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Amp kit for Softrock Ensemble RXTX II

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  • Chuck Wain
    I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does
    Message 1 of 21 , Jun 19, 2013
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      I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does anyone make an amp kit that will work with the Ensemble to boost the output into the 100W range?
      Thanks
      Chuck
      KF7ZQN
    • Chris Wilson
      ... 19/06/2013 23:05 From 4 to 500mW of clean output from the Softrock to 100 Watts is a big jump, you may need 2 stages. For sure it can be done, depends if
      Message 2 of 21 , Jun 19, 2013
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        >
        > I am about half way through building my Ensemble kit. I would like
        > to make real use of it as a transceiver, but at 1W output that will
        > be a challenge. Does anyone make an amp kit that will work with the
        > Ensemble to boost the output into the 100W range?
        > Thanks
        > Chuck
        > KF7ZQN



        19/06/2013 23:05

        From 4 to 500mW of clean output from the Softrock to 100 Watts is a
        big jump, you may need 2 stages. For sure it can be done, depends if
        you want home brew or commercial. Apache Labs are talking of making
        the Anan 100 SDR amp, (100 watts from 400 mW), available as a
        standalone. I have a Russian valved amp that is remote tunable and
        will give full output (MORE than adequate....) from less than 400 mW,
        but it's huge, heavy, complicated and not everyone's cup of tea. Maybe
        the recent (expensive) Elecraft amp would work. I have just acquired a
        20 watt SS amp with switchable filters, that could then drive
        something beefier. But don't underestimate a bare foot Softrock. I
        stayed with digital for ages as I felt SSB voice was a waste of time
        with under a Watt. Then I decided to give it a proper try after
        getting it spot on frequency. I am in England UK, and never cease to
        be amazed at what less than a Watt will do.

        http://www.chriswilson.tv/log.jpg

        --
        Best Regards,
        Chris Wilson. 2E0ILY
      • James
        I get 30 watts out with the HF Packer. http://www.hfprojectsyahoo.com/hf-packeramp.html I m still concerned about in-band spurious emissions from the Ensemble
        Message 3 of 21 , Jun 20, 2013
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          I get 30 watts out with the HF Packer.
          http://www.hfprojectsyahoo.com/hf-packeramp.html


          I'm still concerned about in-band spurious emissions from the Ensemble that get amplified as well. Has anyone put theirs on a spectrum analyzer to check this out?

          Jim/ND6P

          --- In softrock40@yahoogroups.com, Chuck Wain <chuckwain@...> wrote:
          >
          > I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does anyone make an amp kit that will work with the Ensemble to boost the output into the 100W range?
          > Thanks
          > Chuck
          > KF7ZQN
          >
        • Chris Wilson
          ... 20/06/2013 17:44 I have, and posted screen shots here in the last few days. Do a search, I am off out visiting a sick relative, if you can t find them
          Message 4 of 21 , Jun 20, 2013
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            >
            > I get 30 watts out with the HF Packer.
            > http://www.hfprojectsyahoo.com/hf-packeramp.html

            > I'm still concerned about in-band spurious emissions from the
            > Ensemble that get amplified as well. Has anyone put theirs on a
            > spectrum analyzer to check this out?

            > Jim/ND6P

            > --- In softrock40@yahoogroups.com, Chuck Wain <chuckwain@...> wrote:
            >>
            >> I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does anyone make an amp kit that will work with the Ensemble to boost the output into the 100W range?
            >> Thanks
            >> Chuck
            >> KF7ZQN
            >>

            >


            20/06/2013 17:44

            I have, and posted screen shots here in the last few days. Do a
            search, I am off out visiting a sick relative, if you can't find them
            e-mail me chris@...

            --
            Best Regards,
            Chris Wilson. 2E0ILY
          • Chris Wilson
            ... 20/06/2013 17:47 Not as late as I thought, so here you go: This is the message with the link. ~~~~~~~~~~~~~~~~~~~~~~~~~ OK, now I am getting somewhere!
            Message 5 of 21 , Jun 20, 2013
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              >
              > I get 30 watts out with the HF Packer.
              > http://www.hfprojectsyahoo.com/hf-packeramp.html

              > I'm still concerned about in-band spurious emissions from the
              > Ensemble that get amplified as well. Has anyone put theirs on a
              > spectrum analyzer to check this out?

              > Jim/ND6P



              20/06/2013 17:47

              Not as late as I thought, so here you go:

              This is the message with the link.

              ~~~~~~~~~~~~~~~~~~~~~~~~~

              OK, now I am getting somewhere! Using the IQOut software for two tone
              generation, rather than a plain audio two tone file, things seem to be
              working as they should. I took screenshots (must get a GPIB USB whatsit
              one day....) at 100Hz and 30Hz RWB I see the IMD difference from
              running .5 Watt and 1 Watt. The scans look like they should, I
              believe?

              If I am doing this right I'll have a go and see what some
              amplification does, thanks Jack, and all who have assisted in this
              quite long thread. I see where I was going wrong before, I was
              treating it like a "normal" SSB transmitter, not something based on
              quadrature.

              Does anyone know of other IQOut type software that lets you assign a
              particular sound card to its output?

              http://www.gatesgarth.com/IMD-SCANS2/imd2.zip

              --
              Best Regards,
              Chris Wilson. 2E0ILY

              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

              --
              Best Regards,
              Chris Wilson. 2E0ILY
            • Adam Jacobs
              Another (much cheaper) option is the Ramsey monoband QRP linear amplifier kits at $45:
              Message 6 of 21 , Jun 20, 2013
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                Another (much cheaper) option is the Ramsey monoband QRP linear amplifier kits at $45:
                http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP

                Unfortunately, they require about a $20 mouser order to modify them into an actual working amplifier. The amplifier as designed is garbage. But still, $65 for a 20w amplifier including enclosure is not a bad deal.

                -73 Adam W7QI


                On 6/20/2013 7:45 AM, James wrote:
                 

                I get 30 watts out with the HF Packer.
                http://www.hfprojectsyahoo.com/hf-packeramp.html

                I'm still concerned about in-band spurious emissions from the Ensemble that get amplified as well. Has anyone put theirs on a spectrum analyzer to check this out?

                Jim/ND6P

                --- In softrock40@yahoogroups.com, Chuck Wain <chuckwain@...> wrote:
                >
                > I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does anyone make an amp kit that will work with the Ensemble to boost the output into the 100W range?
                > Thanks
                > Chuck
                > KF7ZQN
                >


              • Bob Macklin
                What do you have to do to the Ramey amplifier? Is there documentation? Bob Macklin K5MYJ Seattle, Wa. Real Radios Glow In The Dark ... From: Adam Jacobs To:
                Message 7 of 21 , Jun 20, 2013
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                  What do you have to do to the Ramey amplifier?
                   
                  Is there documentation?
                   
                  Bob Macklin
                  K5MYJ
                  Seattle, Wa.
                  "Real Radios Glow In The Dark"
                  ----- Original Message -----
                  Cc: James
                  Sent: Thursday, June 20, 2013 10:04 AM
                  Subject: Re: [softrock40] Re: Amp kit for Softrock Ensemble RXTX II

                  Another (much cheaper) option is the Ramsey monoband QRP linear amplifier kits at $45:
                  http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP

                  Unfortunately, they require about a $20 mouser order to modify them into an actual working amplifier. The amplifier as designed is garbage. But still, $65 for a 20w amplifier including enclosure is not a bad deal.

                  -73 Adam W7QI


                  On 6/20/2013 7:45 AM, James wrote:
                   

                  I get 30 watts out with the HF Packer.
                  http://www.hfprojectsyahoo.com/hf-packeramp.html

                  I'm still concerned about in-band spurious emissions from the Ensemble that get amplified as well. Has anyone put theirs on a spectrum analyzer to check this out?

                  Jim/ND6P

                  --- In softrock40@yahoogroups.com, Chuck Wain <chuckwain@...> wrote:
                  >
                  > I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does anyone make an amp kit that will work with the Ensemble to boost the output into the 100W range?
                  > Thanks
                  > Chuck
                  > KF7ZQN
                  >


                • Adam Jacobs
                  All of the modifications are documented in the eQSL review comments for the kits. It s a little bit ala-carte, but the biggest modifications are that it needs
                  Message 8 of 21 , Jun 20, 2013
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                    All of the modifications are documented in the eQSL review comments for the kits. It's a little bit ala-carte, but the biggest modifications are that it needs (much) better heatsinks for the finals and it needs to have the bias fixed for the finals. There are some other mods that are good ideas - the TX/RX relay is chattery sometimes, so you can replace the capacitor to make the response slower.. Replacing the cheap finals with IRF510 (pin-compatible) is a great idea as well. Have a look at the eqsl comments and you'll get a feeling for what I'm talking about.

                    -73 Adam W7QI

                    On 6/20/2013 10:15 AM, Bob Macklin wrote:
                     

                    What do you have to do to the Ramey amplifier?
                     
                    Is there documentation?
                     
                    Bob Macklin
                    K5MYJ
                    Seattle, Wa.
                    "Real Radios Glow In The Dark"
                    ----- Original Message -----
                    Cc: James
                    Sent: Thursday, June 20, 2013 10:04 AM
                    Subject: Re: [softrock40] Re: Amp kit for Softrock Ensemble RXTX II

                    Another (much cheaper) option is the Ramsey monoband QRP linear amplifier kits at $45:
                    http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP

                    Unfortunately, they require about a $20 mouser order to modify them into an actual working amplifier. The amplifier as designed is garbage. But still, $65 for a 20w amplifier including enclosure is not a bad deal.

                    -73 Adam W7QI


                    On 6/20/2013 7:45 AM, James wrote:
                     

                    I get 30 watts out with the HF Packer.
                    http://www.hfprojectsyahoo.com/hf-packeramp.html

                    I'm still concerned about in-band spurious emissions from the Ensemble that get amplified as well. Has anyone put theirs on a spectrum analyzer to check this out?

                    Jim/ND6P

                    --- In softrock40@yahoogroups.com, Chuck Wain <chuckwain@...> wrote:
                    >
                    > I am about half way through building my Ensemble kit. I would like to make real use of it as a transceiver, but at 1W output that will be a challenge. Does anyone make an amp kit that will work with the Ensemble to boost the output into the 100W range?
                    > Thanks
                    > Chuck
                    > KF7ZQN
                    >



                  • richard.lawn@ymail.com
                    Can you point me in the direction of these mods. Tnx Rick W2JAZ
                    Message 9 of 21 , Jun 21, 2013
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                      Can you point me in the direction of these mods.
                      Tnx
                      Rick
                      W2JAZ

                      --- In softrock40@yahoogroups.com, Adam Jacobs <jacobs.adam@...> wrote:
                      >
                      > Another (much cheaper) option is the Ramsey monoband QRP linear
                      > amplifier kits at $45:
                      > http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP
                      >
                      > Unfortunately, they require about a $20 mouser order to modify them into
                      > an actual working amplifier. The amplifier as designed is garbage. But
                      > still, $65 for a 20w amplifier including enclosure is not a bad deal.
                      >
                      > -73 Adam W7QI
                      >
                      >
                      > On 6/20/2013 7:45 AM, James wrote:
                      > >
                      > > I get 30 watts out with the HF Packer.
                      > > http://www.hfprojectsyahoo.com/hf-packeramp.html
                      > >
                      > > I'm still concerned about in-band spurious emissions from the Ensemble
                      > > that get amplified as well. Has anyone put theirs on a spectrum
                      > > analyzer to check this out?
                      > >
                      > > Jim/ND6P
                      > >
                      > > --- In softrock40@yahoogroups.com
                      > > <mailto:softrock40%40yahoogroups.com>, Chuck Wain <chuckwain@> wrote:
                      > > >
                      > > > I am about half way through building my Ensemble kit. I would like
                      > > to make real use of it as a transceiver, but at 1W output that will be
                      > > a challenge. Does anyone make an amp kit that will work with the
                      > > Ensemble to boost the output into the 100W range?
                      > > > Thanks
                      > > > Chuck
                      > > > KF7ZQN
                      > > >
                      > >
                      > >
                      >
                    • Sid Boyce
                      A very well designed 20W PA kit see http://www.qsl.net/k5bcq/Kits/Kits.html Kit #15 will take 1W in for 20W out and covers 160m - 6m and includes RX/TX
                      Message 10 of 21 , Jun 21, 2013
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                        A very well designed 20W PA kit see http://www.qsl.net/k5bcq/Kits/Kits.html Kit #15 will take 1W in for 20W out and covers 160m - 6m and includes RX/TX switching either from RF sensing or using S12V from a Softrock.
                        73 ... Sid.

                        On 21/06/13 13:02, richard.lawn@... wrote:
                         

                        Can you point me in the direction of these mods.
                        Tnx
                        Rick
                        W2JAZ

                        --- In softrock40@yahoogroups.com, Adam Jacobs <jacobs.adam@...> wrote:
                        >
                        > Another (much cheaper) option is the Ramsey monoband QRP linear
                        > amplifier kits at $45:
                        > http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP
                        >
                        > Unfortunately, they require about a $20 mouser order to modify them into
                        > an actual working amplifier. The amplifier as designed is garbage. But
                        > still, $65 for a 20w amplifier including enclosure is not a bad deal.
                        >
                        > -73 Adam W7QI
                        >
                        >
                        > On 6/20/2013 7:45 AM, James wrote:
                        > >
                        > > I get 30 watts out with the HF Packer.
                        > > http://www.hfprojectsyahoo.com/hf-packeramp.html
                        > >
                        > > I'm still concerned about in-band spurious emissions from the Ensemble
                        > > that get amplified as well. Has anyone put theirs on a spectrum
                        > > analyzer to check this out?
                        > >
                        > > Jim/ND6P
                        > >
                        > > --- In softrock40@yahoogroups.com
                        > > <mailto:softrock40%40yahoogroups.com>, Chuck Wain <chuckwain@> wrote:
                        > > >
                        > > > I am about half way through building my Ensemble kit. I would like
                        > > to make real use of it as a transceiver, but at 1W output that will be
                        > > a challenge. Does anyone make an amp kit that will work with the
                        > > Ensemble to boost the output into the 100W range?
                        > > > Thanks
                        > > > Chuck
                        > > > KF7ZQN
                        > > >
                        > >
                        > >
                        >



                        -- 
                        Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
                        Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
                        Senior Staff Specialist, Cricket Coach
                        Microsoft Windows Free Zone - Linux used for all Computing Tasks
                        
                      • Jerry Gerken
                        Hi folks:     I ve been using an AN762 / 140 watt kit for about 6 months now.  I get about 50-60 watts with input directly from my 20/40 RXTX.  The AN762
                        Message 11 of 21 , Jun 21, 2013
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                          Hi folks:
                              I've been using an AN762 / 140 watt kit for about 6 months now.  I get about 50-60 watts with input directly from my 20/40 RXTX.  The AN762 was built exactly as in the directions - kit was bought from Communications Concepts in Dayton.  Some photos and discussion here:
                                                   http://sdrbuzz.com/forum/showthread.php?p=944   
                          I also tried putting a 20 watt amp between the RXTX and the AN762-  found that you can raise output to over 100 watts but it makes the adjustment really tricky. 
                          Good luck.
                        • Sid Boyce
                          Interesting, In what way was it tricky? I m hoping to use the K5BCQ 20W amp to drive the AN762. 73 ... Sid. ... -- Sid Boyce ... Hamradio License G3VBV,
                          Message 12 of 21 , Jun 21, 2013
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                            Interesting,
                            In what way was it tricky?
                            I'm hoping to use the K5BCQ 20W amp to drive the AN762.
                            73 ... Sid.

                            On 21/06/13 14:20, Jerry Gerken wrote:
                             
                            Hi folks:
                                I've been using an AN762 / 140 watt kit for about 6 months now.  I get about 50-60 watts with input directly from my 20/40 RXTX.  The AN762 was built exactly as in the directions - kit was bought from Communications Concepts in Dayton.  Some photos and discussion here:
                                                     http://sdrbuzz.com/forum/showthread.php?p=944   
                            I also tried putting a 20 watt amp between the RXTX and the AN762-  found that you can raise output to over 100 watts but it makes the adjustment really tricky. 
                            Good luck.


                            -- 
                            Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
                            Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
                            Senior Staff Specialist, Cricket Coach
                            Microsoft Windows Free Zone - Linux used for all Computing Tasks
                            
                          • jbgerken@ymail.com
                            Hi Sid: I tried 2 different 20 watt amps with the AN762. In both cases I found that I had problems adjusting the output power level. Since I use both SSB
                            Message 13 of 21 , Jun 21, 2013
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                              Hi Sid:

                              I tried 2 different 20 watt amps with the AN762. In both cases I found that I had problems adjusting the output power level. Since I use both SSB (higher power levels) and PSK (lower), readjustment was a problem. Even using the delta44 system (which can store in/out db levels in a file) the power levels required readjustment. Could have been one of several causes- impedance matching or maybe an attenuator could have helped. I sidestepped it by just cutting the 20 watt amp out of the mix- when used alone the AN762 is stable as a rock. Since I'm about to buy a Flex 1500 (5 watt output), I'm not concerned right now. The Flex 5 watt output should drive the AN762 to limit.

                              73 Jerry N5JBG

                              --- In softrock40@yahoogroups.com, Sid Boyce <sboyce@...> wrote:
                              >
                              > Interesting,
                              > In what way was it tricky?
                              > I'm hoping to use the K5BCQ 20W amp to drive the AN762.
                              > 73 ... Sid.
                              >
                              > On 21/06/13 14:20, Jerry Gerken wrote:
                              > > Hi folks:
                              > > I've been using an AN762 / 140 watt kit for about 6 months now. I
                              > > get about 50-60 watts with input directly from my 20/40 RXTX. The
                              > > AN762 was built exactly as in the directions - kit was bought from
                              > > Communications Concepts in Dayton. Some photos and discussion here:
                              > > http://sdrbuzz.com/forum/showthread.php?p=944
                              > > I also tried putting a 20 watt amp between the RXTX and the AN762-
                              > > found that you can raise output to over 100 watts but it makes the
                              > > adjustment really tricky.
                              > > Good luck.
                              > >
                              >
                              >
                              > --
                              > Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
                              > Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
                              > Senior Staff Specialist, Cricket Coach
                              > Microsoft Windows Free Zone - Linux used for all Computing Tasks
                              >
                            • kb9gpm
                              Here are some details I found on it. I m thinking about getting on to experiment with. http://www.eham.net/reviews/detail/1099
                              Message 14 of 21 , Jun 21, 2013
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                                Here are some details I found on it. I'm thinking about getting on to experiment with.

                                http://www.eham.net/reviews/detail/1099

                                --- In softrock40@yahoogroups.com, "richard.lawn@..." <rjlawn@...> wrote:
                                >
                                > Can you point me in the direction of these mods.
                                > Tnx
                                > Rick
                                > W2JAZ
                                >
                                > --- In softrock40@yahoogroups.com, Adam Jacobs <jacobs.adam@> wrote:
                                > >
                                > > Another (much cheaper) option is the Ramsey monoband QRP linear
                                > > amplifier kits at $45:
                                > > http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP
                                > >
                                > > Unfortunately, they require about a $20 mouser order to modify them into
                                > > an actual working amplifier. The amplifier as designed is garbage. But
                                > > still, $65 for a 20w amplifier including enclosure is not a bad deal.
                                > >
                                > > -73 Adam W7QI
                                > >
                                > >
                                > > On 6/20/2013 7:45 AM, James wrote:
                                > > >
                                > > > I get 30 watts out with the HF Packer.
                                > > > http://www.hfprojectsyahoo.com/hf-packeramp.html
                                > > >
                                > > > I'm still concerned about in-band spurious emissions from the Ensemble
                                > > > that get amplified as well. Has anyone put theirs on a spectrum
                                > > > analyzer to check this out?
                                > > >
                                > > > Jim/ND6P
                                > > >
                                > > > --- In softrock40@yahoogroups.com
                                > > > <mailto:softrock40%40yahoogroups.com>, Chuck Wain <chuckwain@> wrote:
                                > > > >
                                > > > > I am about half way through building my Ensemble kit. I would like
                                > > > to make real use of it as a transceiver, but at 1W output that will be
                                > > > a challenge. Does anyone make an amp kit that will work with the
                                > > > Ensemble to boost the output into the 100W range?
                                > > > > Thanks
                                > > > > Chuck
                                > > > > KF7ZQN
                                > > > >
                                > > >
                                > > >
                                > >
                                >
                              • Chris Wilson
                                ... 21/06/2013 21:56 Whilst you are in the mood for trouble and hassle, will you take my wife off my hands? ;) That s a pretty damning review there! -- Best
                                Message 15 of 21 , Jun 21, 2013
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                                  >
                                  > Here are some details I found on it. I'm thinking about getting on to experiment with.

                                  > http://www.eham.net/reviews/detail/1099



                                  21/06/2013 21:56

                                  Whilst you are in the mood for trouble and hassle, will you take my
                                  wife off my hands? ;) That's a pretty damning review there!

                                  --
                                  Best Regards,
                                  Chris Wilson. 2E0ILY
                                • sdrcrazed
                                  There s a detailed buildup article for the Ramsey amp kit with lots of information at http://sdrbuzz.com/forum/showthread.php?t=121. I use this Ramsey
                                  Message 16 of 21 , Jun 21, 2013
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                                    There's a detailed buildup article for the Ramsey amp kit with lots of information at http://sdrbuzz.com/forum/showthread.php?t=121. I use this Ramsey regularly for PSK operation and have used it successfully with SSB and even AM.
                                    There's also some info on the AN762 amp at http://sdrbuzz.com/forum/showthread.php?t=237

                                    The Ramsey amp kits are available a bit cheaper at http://boomerssupply.com/shopexd.asp?id=15689

                                    Ed KT6F


                                    --- In softrock40@yahoogroups.com, Adam Jacobs <jacobs.adam@...> wrote:
                                    >
                                    > All of the modifications are documented in the eQSL review comments for
                                    > the kits. It's a little bit ala-carte, but the biggest modifications are
                                    > that it needs (much) better heatsinks for the finals and it needs to
                                    > have the bias fixed for the finals. There are some other mods that are
                                    > good ideas - the TX/RX relay is chattery sometimes, so you can replace
                                    > the capacitor to make the response slower.. Replacing the cheap finals
                                    > with IRF510 (pin-compatible) is a great idea as well. Have a look at the
                                    > eqsl comments and you'll get a feeling for what I'm talking about.
                                    >
                                    > -73 Adam W7QI
                                    >
                                    > On 6/20/2013 10:15 AM, Bob Macklin wrote:
                                    > >
                                    > > What do you have to do to the Ramey amplifier?
                                    > > Is there documentation?
                                    > > Bob Macklin
                                    > > K5MYJ
                                    > > Seattle, Wa.
                                    > > "Real Radios Glow In The Dark"
                                    > >
                                    > > ----- Original Message -----
                                    > > *From:* Adam Jacobs <mailto:jacobs.adam@...>
                                    > > *To:* softrock40@yahoogroups.com <mailto:softrock40@yahoogroups.com>
                                    > > *Cc:* James <mailto:jpkellyburbank@...>
                                    > > *Sent:* Thursday, June 20, 2013 10:04 AM
                                    > > *Subject:* Re: [softrock40] Re: Amp kit for Softrock Ensemble RXTX II
                                    > >
                                    > > Another (much cheaper) option is the Ramsey monoband QRP linear
                                    > > amplifier kits at $45:
                                    > > http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP
                                    > >
                                    > > Unfortunately, they require about a $20 mouser order to modify
                                    > > them into an actual working amplifier. The amplifier as designed
                                    > > is garbage. But still, $65 for a 20w amplifier including enclosure
                                    > > is not a bad deal.
                                    > >
                                    > > -73 Adam W7QI
                                    > >
                                    > >
                                    > > On 6/20/2013 7:45 AM, James wrote:
                                    > >>
                                    > >> I get 30 watts out with the HF Packer.
                                    > >> http://www.hfprojectsyahoo.com/hf-packeramp.html
                                    > >>
                                    > >> I'm still concerned about in-band spurious emissions from the
                                    > >> Ensemble that get amplified as well. Has anyone put theirs on a
                                    > >> spectrum analyzer to check this out?
                                    > >>
                                    > >> Jim/ND6P
                                    > >>
                                    > >> --- In softrock40@yahoogroups.com
                                    > >> <mailto:softrock40%40yahoogroups.com>, Chuck Wain <chuckwain@>
                                    > >> wrote:
                                    > >> >
                                    > >> > I am about half way through building my Ensemble kit. I would
                                    > >> like to make real use of it as a transceiver, but at 1W output
                                    > >> that will be a challenge. Does anyone make an amp kit that will
                                    > >> work with the Ensemble to boost the output into the 100W range?
                                    > >> > Thanks
                                    > >> > Chuck
                                    > >> > KF7ZQN
                                    > >> >
                                    > >>
                                    > >
                                    > >
                                    >
                                  • Sid Boyce
                                    Thanks Jerry. I wondered if it was a stability issue. I would be using an attenuator between the 1W driver and the 20W PA which has provision for a Pi
                                    Message 17 of 21 , Jun 21, 2013
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                                      Thanks Jerry.
                                      I wondered if it was a stability issue.
                                      I would be using an attenuator between the 1W driver and the 20W PA which has provision for a Pi attenuator at its input.
                                      73 ... Sid.

                                      On 21/06/13 16:49, jbgerken@... wrote:
                                       

                                      Hi Sid:

                                      I tried 2 different 20 watt amps with the AN762. In both cases I found that I had problems adjusting the output power level. Since I use both SSB (higher power levels) and PSK (lower), readjustment was a problem. Even using the delta44 system (which can store in/out db levels in a file) the power levels required readjustment. Could have been one of several causes- impedance matching or maybe an attenuator could have helped. I sidestepped it by just cutting the 20 watt amp out of the mix- when used alone the AN762 is stable as a rock. Since I'm about to buy a Flex 1500 (5 watt output), I'm not concerned right now. The Flex 5 watt output should drive the AN762 to limit.

                                      73 Jerry N5JBG

                                      --- In softrock40@yahoogroups.com, Sid Boyce <sboyce@...> wrote:
                                      >
                                      > Interesting,
                                      > In what way was it tricky?
                                      > I'm hoping to use the K5BCQ 20W amp to drive the AN762.
                                      > 73 ... Sid.
                                      >
                                      > On 21/06/13 14:20, Jerry Gerken wrote:
                                      > > Hi folks:
                                      > > I've been using an AN762 / 140 watt kit for about 6 months now. I
                                      > > get about 50-60 watts with input directly from my 20/40 RXTX. The
                                      > > AN762 was built exactly as in the directions - kit was bought from
                                      > > Communications Concepts in Dayton. Some photos and discussion here:
                                      > > http://sdrbuzz.com/forum/showthread.php?p=944
                                      > > I also tried putting a 20 watt amp between the RXTX and the AN762-
                                      > > found that you can raise output to over 100 watts but it makes the
                                      > > adjustment really tricky.
                                      > > Good luck.
                                      > >
                                      >
                                      >
                                      >



                                      -- 
                                      Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
                                      Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
                                      Senior Staff Specialist, Cricket Coach
                                      Microsoft Windows Free Zone - Linux used for all Computing Tasks
                                      
                                    • Kees & Sandy
                                      Adding a 3dB or 6dB attenuator (no less than 3dB) between the driver and the Amplifier does worlds of good in matching the two so they work efficiently with
                                      Message 18 of 21 , Jun 21, 2013
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                                        Adding a 3dB or 6dB attenuator (no less than 3dB) between the driver and the Amplifier does worlds of good in matching the two so they work efficiently with each other.
                                         
                                        73 Kees K5BCQ


                                        ---------- Original Message ----------
                                        From: Sid Boyce <sboyce@...>
                                        To: softrock40@yahoogroups.com
                                        Subject: Re: [softrock40] Re: Amp kit for Softrock Ensemble RXTX II
                                        Date: Fri, 21 Jun 2013 22:21:16 +0100

                                         

                                        Thanks Jerry.
                                        I wondered if it was a stability issue.
                                        I would be using an attenuator between the 1W driver and the 20W PA which has provision for a Pi attenuator at its input.
                                        73 ... Sid.

                                        On 21/06/13 16:49, jbgerken@... wrote:
                                         

                                        Hi Sid:

                                        I tried 2 different 20 watt amps with the AN762. In both cases I found that I had problems adjusting the output power level. Since I use both SSB (higher power levels) and PSK (lower), readjustment was a problem. Even using the delta44 system (which can store in/out db levels in a file) the power levels required readjustment. Could have been one of several causes- impedance matching or maybe an attenuator could have helped. I sidestepped it by just cutting the 20 watt amp out of the mix- when used alone the AN762 is stable as a rock. Since I'm about to buy a Flex 1500 (5 watt output), I'm not concerned right now. The Flex 5 watt output should drive the AN762 to limit.

                                        73 Jerry N5JBG

                                        --- In softrock40@yahoogroups.com, Sid Boyce <sboyce@...> wrote:
                                        >
                                        > Interesting,
                                        > In what way was it tricky?
                                        > I'm hoping to use the K5BCQ 20W amp to drive the AN762.
                                        > 73 ... Sid.
                                        >
                                        > On 21/06/13 14:20, Jerry Gerken wrote:
                                        > > Hi folks:
                                        > > I've been using an AN762 / 140 watt kit for about 6 months now. I
                                        > > get about 50-60 watts with input directly from my 20/40 RXTX. The
                                        > > AN762 was built exactly as in the directions - kit was bought from
                                        > > Communications Concepts in Dayton. Some photos and discussion here:
                                        > > http://sdrbuzz.com/forum/showthread.php?p=944
                                        > > I also tried putting a 20 watt amp between the RXTX and the AN762-
                                        > > found that you can raise output to over 100 watts but it makes the
                                        > > adjustment really tricky.
                                        > > Good luck.
                                        > >
                                        >
                                        >
                                        >



                                        -- 
                                        Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
                                        Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
                                        Senior Staff Specialist, Cricket Coach
                                        Microsoft Windows Free Zone - Linux used for all Computing Tasks
                                        

                                         

                                         

                                      • jbgerken@ymail.com
                                        Sid & Kees : Thanks guys. As soon as I get a chance I may revisit that situation and add attenuation between the RXTX and the amp. I never like to let the
                                        Message 19 of 21 , Jun 21, 2013
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                                          Sid & Kees :
                                          Thanks guys. As soon as I get a chance I may revisit that situation and add attenuation between the RXTX and the amp. I never like to let the electrons get the upper hand.
                                          73 Jerry N5JBG

                                          --- In softrock40@yahoogroups.com, "Kees & Sandy" <windy10605@...> wrote:
                                          >
                                          > Adding a 3dB or 6dB attenuator (no less than 3dB) between the driver and the Amplifier does worlds of good in matching the two so they work efficiently with each other. 73 Kees K5BCQ
                                          >
                                          > ---------- Original Message ----------
                                          > From: Sid Boyce <sboyce@...>
                                          > To: softrock40@yahoogroups.com
                                          > Subject: Re: [softrock40] Re: Amp kit for Softrock Ensemble RXTX II
                                          > Date: Fri, 21 Jun 2013 22:21:16 +0100
                                          >
                                          >
                                          >
                                          > Thanks Jerry.
                                          > I wondered if it was a stability issue.
                                          > I would be using an attenuator between the 1W driver and the 20W PA which has provision for a Pi attenuator at its input.
                                          > 73 ... Sid.
                                          >
                                          > On 21/06/13 16:49, jbgerken@... wrote: Hi Sid:
                                          >
                                          > I tried 2 different 20 watt amps with the AN762. In both cases I found that I had problems adjusting the output power level. Since I use both SSB (higher power levels) and PSK (lower), readjustment was a problem. Even using the delta44 system (which can store in/out db levels in a file) the power levels required readjustment. Could have been one of several causes- impedance matching or maybe an attenuator could have helped. I sidestepped it by just cutting the 20 watt amp out of the mix- when used alone the AN762 is stable as a rock. Since I'm about to buy a Flex 1500 (5 watt output), I'm not concerned right now. The Flex 5 watt output should drive the AN762 to limit.
                                          >
                                          > 73 Jerry N5JBG
                                          >
                                          > --- In softrock40@yahoogroups.com, Sid Boyce <sboyce@> wrote:
                                          > >
                                          > > Interesting,
                                          > > In what way was it tricky?
                                          > > I'm hoping to use the K5BCQ 20W amp to drive the AN762.
                                          > > 73 ... Sid.
                                          > >
                                          > > On 21/06/13 14:20, Jerry Gerken wrote:
                                          > > > Hi folks:
                                          > > > I've been using an AN762 / 140 watt kit for about 6 months now. I
                                          > > > get about 50-60 watts with input directly from my 20/40 RXTX. The
                                          > > > AN762 was built exactly as in the directions - kit was bought from
                                          > > > Communications Concepts in Dayton. Some photos and discussion here:
                                          > > > http://sdrbuzz.com/forum/showthread.php?p=944
                                          > > > I also tried putting a 20 watt amp between the RXTX and the AN762-
                                          > > > found that you can raise output to over 100 watts but it makes the
                                          > > > adjustment really tricky.
                                          > > > Good luck.
                                          > > >
                                          > >
                                          > >
                                          > >
                                          >
                                          >
                                          >
                                          >
                                          >
                                          > -- Sid Boyce ... Hamradio License G3VBV, Licensed Private PilotEmeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech SupportSenior Staff Specialist, Cricket CoachMicrosoft Windows Free Zone - Linux used for all Computing Tasks
                                          >
                                        • OvaEasy
                                          I HAVE THE SAME KIT WITH ALL THE FILTERS HEAT SINK ETC. THE PTT NEEDS AN RCA PLUG. JUST WENT THRU EYE SURGERY MY DAYS OF BUILDING ARE OVER, HAVE ANOTHER
                                          Message 20 of 21 , Jun 22, 2013
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                                            I HAVE THE SAME KIT WITH ALL THE FILTERS HEAT SINK ETC. THE PTT NEEDS AN RCA PLUG.
                                            JUST WENT THRU EYE SURGERY MY DAYS OF BUILDING ARE OVER, HAVE ANOTHER COMMUNICATIONS CONCEPT AMP FULLY FUNCTIONAL.

                                            MAKE OFFER AND PAY SHIPPING AND YOU WILL BE THE LUCKY WINNER.......
                                            BARRY-WB6LDL
                                            PARDON THE CAPS HARD TO SEE.
                                            CALL FOR FURTHER INFO.
                                            Thank you in advance for your consideration and
                                            reply.

                                            HOME 850-722-0231
                                            CELL 850-814-8339
                                            EMAIL-burro5944@...
                                            THANKS ALL



                                            On 6/21/2013 8:20 AM, Jerry Gerken wrote:
                                             
                                            Hi folks:
                                                I've been using an AN762 / 140 watt kit for about 6 months now.  I get about 50-60 watts with input directly from my 20/40 RXTX.  The AN762 was built exactly as in the directions - kit was bought from Communications Concepts in Dayton.  Some photos and discussion here:
                                                                     http://sdrbuzz.com/forum/showthread.php?p=944   
                                            I also tried putting a 20 watt amp between the RXTX and the AN762-  found that you can raise output to over 100 watts but it makes the adjustment really tricky. 
                                            Good luck.

                                          • softrookie
                                            Hello there, I have four softrock ensembles tx/rx and I use a wa2eby amp. The boards are on eBay for 20$ the rest is in Mouser ele.for 75$.Its a 24 volt
                                            Message 21 of 21 , Jun 22, 2013
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                                              Hello there, I have four softrock ensembles tx/rx and I use a wa2eby amp. The boards are on eBay for 20$ the rest is in Mouser ele.for 75$.Its a 24 volt push/pull config,1=45 I get 55 watts on 40-80 45 watts on 10-20..I then drive an ameritron 811 and get 600 watts of clean rf no problems.....All of my legacy radios are in the box.Good luck
                                              --- In softrock40@yahoogroups.com, "kb9gpm" <goofy_36@...> wrote:
                                              >
                                              > Here are some details I found on it. I'm thinking about getting on to experiment with.
                                              >
                                              > http://www.eham.net/reviews/detail/1099
                                              >
                                              > --- In softrock40@yahoogroups.com, "richard.lawn@" <rjlawn@> wrote:
                                              > >
                                              > > Can you point me in the direction of these mods.
                                              > > Tnx
                                              > > Rick
                                              > > W2JAZ
                                              > >
                                              > > --- In softrock40@yahoogroups.com, Adam Jacobs <jacobs.adam@> wrote:
                                              > > >
                                              > > > Another (much cheaper) option is the Ramsey monoband QRP linear
                                              > > > amplifier kits at $45:
                                              > > > http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=QAMP
                                              > > >
                                              > > > Unfortunately, they require about a $20 mouser order to modify them into
                                              > > > an actual working amplifier. The amplifier as designed is garbage. But
                                              > > > still, $65 for a 20w amplifier including enclosure is not a bad deal.
                                              > > >
                                              > > > -73 Adam W7QI
                                              > > >
                                              > > >
                                              > > > On 6/20/2013 7:45 AM, James wrote:
                                              > > > >
                                              > > > > I get 30 watts out with the HF Packer.
                                              > > > > http://www.hfprojectsyahoo.com/hf-packeramp.html
                                              > > > >
                                              > > > > I'm still concerned about in-band spurious emissions from the Ensemble
                                              > > > > that get amplified as well. Has anyone put theirs on a spectrum
                                              > > > > analyzer to check this out?
                                              > > > >
                                              > > > > Jim/ND6P
                                              > > > >
                                              > > > > --- In softrock40@yahoogroups.com
                                              > > > > <mailto:softrock40%40yahoogroups.com>, Chuck Wain <chuckwain@> wrote:
                                              > > > > >
                                              > > > > > I am about half way through building my Ensemble kit. I would like
                                              > > > > to make real use of it as a transceiver, but at 1W output that will be
                                              > > > > a challenge. Does anyone make an amp kit that will work with the
                                              > > > > Ensemble to boost the output into the 100W range?
                                              > > > > > Thanks
                                              > > > > > Chuck
                                              > > > > > KF7ZQN
                                              > > > > >
                                              > > > >
                                              > > > >
                                              > > >
                                              > >
                                              >
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