Loading ...
Sorry, an error occurred while loading the content.
 

20W Amplfiers ....what, another one

Expand Messages
  • Kees & Sandy
    Speaking of 20W Amplifiers and kits here is my entry into the foray.......It s kit #15 on my website http://www.qsl.net/k5bcq/Kits/Kits.html 73 Kees K5BCQ
    Message 1 of 14 , Mar 18, 2012

      Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

      73 Kees K5BCQ

    • Sid Boyce
      Hi Kees, Got mine built some days ago, just need to make up coax ends and test. A job for tomorrow. 73 ... Sid. ... -- Sid Boyce ... Hamradio License G3VBV,
      Message 2 of 14 , Mar 18, 2012
        Hi Kees,
        Got mine built some days ago, just need to make up coax ends and test.
        A job for tomorrow.
        73 ... Sid.

        On 18/03/12 21:44, Kees & Sandy wrote:  

        Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

        73 Kees K5BCQ



        -- 
        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
        Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors. 73 Kees K5BCQ ... From: Sid Boyce To:
        Message 3 of 14 , Mar 18, 2012

          Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

          73 Kees K5BCQ

          ---------- Original Message ----------
          From: Sid Boyce <sboyce@...>
          To: softrock40@yahoogroups.com
          Subject: Re: [softrock40] 20W Amplfiers ....what, another one
          Date: Mon, 19 Mar 2012 00:08:01 +0000

           

          Hi Kees,
          Got mine built some days ago, just need to make up coax ends and test.
          A job for tomorrow.
          73 ... Sid.

          On 18/03/12 21:44, Kees & Sandy wrote:
           

          Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

          73 Kees K5BCQ



          -- 
          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
          

        • Jeff Blaine
          Lot of cool stuff on your list Kees... 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie From: Kees & Sandy Sent: Sunday, March 18, 2012 9:04 PM To:
          Message 4 of 14 , Mar 18, 2012
            Lot of cool stuff on your list Kees...
             
            73/jeff/ac0c
            www.ac0c.com
            alpha-charlie-zero-charlie

             
            Sent: Sunday, March 18, 2012 9:04 PM
            Subject: Re: [softrock40] 20W Amplfiers ....what, another one
             
             

            Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

            73 Kees K5BCQ

            ---------- Original Message ----------
            From: Sid Boyce <sboyce@...>
            To: softrock40@yahoogroups.com
            Subject: Re: [softrock40] 20W Amplfiers ....what, another one
            Date: Mon, 19 Mar 2012 00:08:01 +0000

             

            Hi Kees,
            Got mine built some days ago, just need to make up coax ends and test.
            A job for tomorrow.
            73 ... Sid.

            On 18/03/12 21:44, Kees & Sandy wrote:

             

            Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

            73 Kees K5BCQ



            -- 
            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
            
          • Sid Boyce
            I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors. I also made up a fan speed controller to quieten the
            Message 5 of 14 , Mar 19, 2012
              I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

              I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
              Close up PC fans at full pelt are incredibly noisy.
              73 ... Sid.

              On 19/03/12 02:04, Kees & Sandy wrote:  

              Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

              73 Kees K5BCQ

              ---------- Original Message ----------
              From: Sid Boyce <sboyce@...>
              To: softrock40@yahoogroups.com
              Subject: Re: [softrock40] 20W Amplfiers ....what, another one
              Date: Mon, 19 Mar 2012 00:08:01 +0000

               

              Hi Kees,
              Got mine built some days ago, just need to make up coax ends and test.
              A job for tomorrow.
              73 ... Sid.

              On 18/03/12 21:44, Kees & Sandy wrote:

               

              Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

              73 Kees K5BCQ



              -- 
              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
              


              -- 
              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
              
          • MIKE DURKIN
            Care to share the design of the fan control?.... ( I have lots of LM317T s) ... From: Sid Boyce Sent: 19 Mar 2012 12:12:30 GMT To: softrock40@yahoogroups.com
            Message 6 of 14 , Mar 19, 2012
              Care to share the design of the fan control?.... ( I have lots of LM317T's)

              -----Original Message-----

              From: Sid Boyce
              Sent: 19 Mar 2012 12:12:30 GMT
              To: softrock40@yahoogroups.com
              Subject: Re: [softrock40] 20W Amplfiers ....what, another one

               

              I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

              I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
              Close up PC fans at full pelt are incredibly noisy.
              73 ... Sid.

              On 19/03/12 02:04, Kees & Sandy wrote:

               

              Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

              73 Kees K5BCQ

              ---------- Original Message ----------
              From: Sid Boyce <sboyce@...>
              To: softrock40@yahoogroups.com
              Subject: Re: [softrock40] 20W Amplfiers ....what, another one
              Date: Mon, 19 Mar 2012 00:08:01 +0000

               

              Hi Kees,
              Got mine built some days ago, just need to make up coax ends and test.
              A job for tomorrow.
              73 ... Sid.

              On 18/03/12 21:44, Kees & Sandy wrote:

               

              Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

              73 Kees K5BCQ



              -- 
              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
              


              -- 
              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
              One advantage? of the whimpy Chinese AM-2 computer heatsink fans is that they don t make much noise and when you stick your finger in the fan, it just stops
              Message 7 of 14 , Mar 19, 2012

                One advantage? of the whimpy Chinese AM-2 computer heatsink fans is that they don't make much noise and when you stick your finger in the fan, it just stops (vs taking off a small slice of finger or a piece of a blade).

                73 Kees K5BCQ

                 

                ---------- Original Message ----------
                From: MIKE DURKIN <Patriot121@...>
                To: <softrock40@yahoogroups.com>
                Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                Date: Mon, 19 Mar 2012 07:41:35 -0700

                 

                Care to share the design of the fan control?.... ( I have lots of LM317T's)

                -----Original Message-----

                From: Sid Boyce
                Sent: 19 Mar 2012 12:12:30 GMT
                To: softrock40@yahoogroups.com
                Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                 

                I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                Close up PC fans at full pelt are incredibly noisy.
                73 ... Sid.

                On 19/03/12 02:04, Kees & Sandy wrote:

                 

                Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

                73 Kees K5BCQ

                ---------- Original Message ----------
                From: Sid Boyce <sboyce@...>
                To: softrock40@yahoogroups.com
                Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                Date: Mon, 19 Mar 2012 00:08:01 +0000

                 

                Hi Kees,
                Got mine built some days ago, just need to make up coax ends and test.
                A job for tomorrow.
                73 ... Sid.

                On 18/03/12 21:44, Kees & Sandy wrote:

                 

                Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

                73 Kees K5BCQ



                -- 
                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
                


                -- 
                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
                

              • Sid Boyce
                Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html . Some years ago I bought a 13.8V PS that got exceedingly hot to touch, now even running
                Message 8 of 14 , Mar 19, 2012
                Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html .
                Some years ago I bought a 13.8V PS that got exceedingly hot to touch, now even running silently 24/7 it's very cool. I mount the LM317 on a piece of aluminium to act as a heatsink or a small TO220 heatsink but it doesn't need to be for small fans.

                I use this circuit anywhere where I need quiet cooling.
                The 220 ohm resistor and the LED can be left out.

                I used components to hand for the used with the 20W PA.
                I had a 330 ohm and a 5K variable after a quick rummage through a parts box so I used them. The .JPG is similar, showing component values are not critical.
                73 ... Sid.

                On 19/03/12 14:41, MIKE DURKIN wrote:
                 

                Care to share the design of the fan control?.... ( I have lots of LM317T's)

                -----Original Message-----

                From: Sid Boyce
                Sent: 19 Mar 2012 12:12:30 GMT
                To: softrock40@yahoogroups.com
                Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                 

                I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                Close up PC fans at full pelt are incredibly noisy.
                73 ... Sid.

                On 19/03/12 02:04, Kees & Sandy wrote:

                 

                Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

                73 Kees K5BCQ

                ---------- Original Message ----------
                From: Sid Boyce <sboyce@...>
                To: softrock40@yahoogroups.com
                Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                Date: Mon, 19 Mar 2012 00:08:01 +0000

                 

                Hi Kees,
                Got mine built some days ago, just need to make up coax ends and test.
                A job for tomorrow.
                73 ... Sid.

                On 18/03/12 21:44, Kees & Sandy wrote:

                 

                Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

                73 Kees K5BCQ



                -- 
                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
                


                -- 
                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
                


                -- 
                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
                
              • Sid Boyce
                The impeller on the one shipped came apart. I used epoxy to fix it on again but it failed to operate so I got one from an old CPU heatsink and that baby makes
                Message 9 of 14 , Mar 19, 2012
                  The impeller on the one shipped came apart. I used epoxy to fix it on again but it failed to operate so I got one from an old CPU heatsink and that baby makes quite a noise off 13.8V.
                  73 ... Sid.
                   
                  On 19/03/12 17:00, Kees & Sandy wrote:  

                  One advantage? of the whimpy Chinese AM-2 computer heatsink fans is that they don't make much noise and when you stick your finger in the fan, it just stops (vs taking off a small slice of finger or a piece of a blade).

                  73 Kees K5BCQ

                   

                  ---------- Original Message ----------
                  From: MIKE DURKIN <Patriot121@...>
                  To: <softrock40@yahoogroups.com>
                  Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                  Date: Mon, 19 Mar 2012 07:41:35 -0700

                   

                  Care to share the design of the fan control?.... ( I have lots of LM317T's)

                  -----Original Message-----

                  From: Sid Boyce
                  Sent: 19 Mar 2012 12:12:30 GMT
                  To: softrock40@yahoogroups.com
                  Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                   

                  I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                  I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                  Close up PC fans at full pelt are incredibly noisy.
                  73 ... Sid.

                  On 19/03/12 02:04, Kees & Sandy wrote:

                   

                  Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.

                  73 Kees K5BCQ

                  ---------- Original Message ----------
                  From: Sid Boyce <sboyce@...>
                  To: softrock40@yahoogroups.com
                  Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                  Date: Mon, 19 Mar 2012 00:08:01 +0000

                   

                  Hi Kees,
                  Got mine built some days ago, just need to make up coax ends and test.
                  A job for tomorrow.
                  73 ... Sid.

                  On 18/03/12 21:44, Kees & Sandy wrote:

                   

                  Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html

                  73 Kees K5BCQ



                  -- 
                  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
                  


                  -- 
                  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
                  


                  -- 
                  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
                  
                • MIKE DURKIN
                  AHHHhhh ... thought you might have some temp sencing going on .. nope, its just a speed controll ... Ok thanks for posting it. Mike KC7NOA To:
                  Message 10 of 14 , Mar 19, 2012
                    AHHHhhh ... thought you might have some temp sencing going on .. nope, its just a speed controll ...
                     
                    Ok thanks for posting it.
                     
                    Mike KC7NOA
                     

                    To: softrock40@yahoogroups.com
                    From: sboyce@...
                    Date: Mon, 19 Mar 2012 19:10:58 +0000
                    Subject: Re: [softrock40] 20W Amplfiers ....what, another one [2 Attachments]

                     
                    [Attachment(s) from Sid Boyce included below] Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html .
                    Some years ago I bought a 13.8V PS that got exceedingly hot to touch, now even running silently 24/7 it's very cool. I mount the LM317 on a piece of aluminium to act as a heatsink or a small TO220 heatsink but it doesn't need to be for small fans.

                    I use this circuit anywhere where I need quiet cooling.
                    The 220 ohm resistor and the LED can be left out.

                    I used components to hand for the used with the 20W PA.
                    I had a 330 ohm and a 5K variable after a quick rummage through a parts box so I used them. The .JPG is similar, showing component values are not critical.
                    73 ... Sid.

                    On 19/03/12 14:41, MIKE DURKIN wrote:
                     


                    Care to share the design of the fan control?.... ( I have lots of LM317T's)

                    -----Original Message-----

                    From: Sid Boyce
                    Sent: 19 Mar 2012 12:12:30 GMT
                    To: softrock40@yahoogroups.com
                    Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                     
                    I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                    I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                    Close up PC fans at full pelt are incredibly noisy.
                    73 ... Sid.

                    On 19/03/12 02:04, Kees & Sandy wrote:
                     
                    Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.
                    73 Kees K5BCQ

                    ---------- Original Message ----------
                    From: Sid Boyce <sboyce@...>
                    To: softrock40@yahoogroups.com
                    Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                    Date: Mon, 19 Mar 2012 00:08:01 +0000

                     
                    Hi Kees,
                    Got mine built some days ago, just need to make up coax ends and test.
                    A job for tomorrow.
                    73 ... Sid.

                    On 18/03/12 21:44, Kees & Sandy wrote:
                     
                    Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html
                    73 Kees K5BCQ


                    -- 
                    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
                    


                    -- 
                    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
                    


                    -- 
                    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
                    

                  • Sid Boyce
                    I didn t go for temperature sensing, preferring quiet continuous running. 73 ... Sid. ... -- Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot,
                    Message 11 of 14 , Mar 19, 2012
                      I didn't go for temperature sensing, preferring quiet continuous running.
                      73 ... Sid.

                      On 19/03/12 20:16, MIKE DURKIN wrote:
                       

                      AHHHhhh ... thought you might have some temp sencing going on .. nope, its just a speed controll ...
                       
                      Ok thanks for posting it.
                       
                      Mike KC7NOA
                       

                      To: softrock40@yahoogroups.com
                      From: sboyce@...
                      Date: Mon, 19 Mar 2012 19:10:58 +0000
                      Subject: Re: [softrock40] 20W Amplfiers ....what, another one [2 Attachments]

                       
                      [Attachment(s) from Sid Boyce included below] Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html .
                      Some years ago I bought a 13.8V PS that got exceedingly hot to touch, now even running silently 24/7 it's very cool. I mount the LM317 on a piece of aluminium to act as a heatsink or a small TO220 heatsink but it doesn't need to be for small fans.

                      I use this circuit anywhere where I need quiet cooling.
                      The 220 ohm resistor and the LED can be left out.

                      I used components to hand for the used with the 20W PA.
                      I had a 330 ohm and a 5K variable after a quick rummage through a parts box so I used them. The .JPG is similar, showing component values are not critical.
                      73 ... Sid.

                      On 19/03/12 14:41, MIKE DURKIN wrote:
                       


                      Care to share the design of the fan control?.... ( I have lots of LM317T's)

                      -----Original Message-----

                      From: Sid Boyce
                      Sent: 19 Mar 2012 12:12:30 GMT
                      To: softrock40@yahoogroups.com
                      Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                       
                      I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                      I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                      Close up PC fans at full pelt are incredibly noisy.
                      73 ... Sid.

                      On 19/03/12 02:04, Kees & Sandy wrote:
                       
                      Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.
                      73 Kees K5BCQ

                      ---------- Original Message ----------
                      From: Sid Boyce <sboyce@...>
                      To: softrock40@yahoogroups.com
                      Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                      Date: Mon, 19 Mar 2012 00:08:01 +0000

                       
                      Hi Kees,
                      Got mine built some days ago, just need to make up coax ends and test.
                      A job for tomorrow.
                      73 ... Sid.

                      On 18/03/12 21:44, Kees & Sandy wrote:
                       
                      Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html
                      73 Kees K5BCQ



                      .



                      -- 
                      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
                      
                    • S.Sanath Kumar
                      Rolling stone gathers no moss, but a running fan definitely gathers dust. I link up the PA fan to the PPT  and this way the fan is operational when its
                      Message 12 of 14 , Mar 19, 2012
                        Rolling stone gathers no moss, but a running fan definitely gathers dust. I link up the PA fan to the PPT  and this way the fan is operational when its transmitting.  Don't care much about the noise when i am Talking  hi hi !!!.  ;-). This arrangement worked for me with a IRF510 based 10 W RF amp with a similar heat sink and fan . A better albeit a bit more complex but simpler than a temp control would be to have a delayed cutoff to the fan after transmission.
                        Sanath



                        From: Sid Boyce <sboyce@...>
                        To: softrock40@yahoogroups.com
                        Sent: Monday, March 19, 2012 3:28 PM
                        Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                         
                        I didn't go for temperature sensing, preferring quiet continuous running.
                        73 ... Sid.

                        On 19/03/12 20:16, MIKE DURKIN wrote:
                         
                        AHHHhhh ... thought you might have some temp sencing going on .. nope, its just a speed controll ...
                         
                        Ok thanks for posting it.
                         
                        Mike KC7NOA
                         

                        To: softrock40@yahoogroups.com
                        From: sboyce@...
                        Date: Mon, 19 Mar 2012 19:10:58 +0000
                        Subject: Re: [softrock40] 20W Amplfiers ....what, another one [2 Attachments]

                         
                        [Attachment(s) from Sid Boyce included below] Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html .
                        Some years ago I bought a 13.8V PS that got exceedingly hot to touch, now even running silently 24/7 it's very cool. I mount the LM317 on a piece of aluminium to act as a heatsink or a small TO220 heatsink but it doesn't need to be for small fans.

                        I use this circuit anywhere where I need quiet cooling.
                        The 220 ohm resistor and the LED can be left out.

                        I used components to hand for the used with the 20W PA.
                        I had a 330 ohm and a 5K variable after a quick rummage through a parts box so I used them. The .JPG is similar, showing component values are not critical.
                        73 ... Sid.

                        On 19/03/12 14:41, MIKE DURKIN wrote:
                         

                        Care to share the design of the fan control?.... ( I have lots of LM317T's)

                        -----Original Message-----

                        From: Sid Boyce
                        Sent: 19 Mar 2012 12:12:30 GMT
                        To: softrock40@yahoogroups.com
                        Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                         
                        I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                        I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                        Close up PC fans at full pelt are incredibly noisy.
                        73 ... Sid.

                        On 19/03/12 02:04, Kees & Sandy wrote:
                         
                        Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.
                        73 Kees K5BCQ

                        ---------- Original Message ----------
                        From: Sid Boyce <sboyce@...>
                        To: softrock40@yahoogroups.com
                        Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                        Date: Mon, 19 Mar 2012 00:08:01 +0000

                         
                        Hi Kees,
                        Got mine built some days ago, just need to make up coax ends and test.
                        A job for tomorrow.
                        73 ... Sid.

                        On 18/03/12 21:44, Kees & Sandy wrote:
                         
                        Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html
                        73 Kees K5BCQ



                        .



                        -- 
                        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
                        


                      • cbayona.cb
                        Simple Electronics is a NE555 time directly driving the fan, the PTT connects to the trigger input, When PTT is pressed the fan comes on, when it s release
                        Message 13 of 14 , Mar 19, 2012
                          Simple Electronics is a NE555 time directly
                          driving the fan, the PTT connects to the trigger
                          input, When PTT is pressed the fan comes on, when
                          it's release then it stop the fan after the
                          timing period, you determine that with a RC circuit in the Timer chip.

                          At 04:58 PM 3/19/2012, you wrote:


                          >Rolling stone gathers no moss, but a running fan
                          >definitely gathers dust. I link up the PA fan to
                          >the PPT and this way the fan is operational
                          >when its transmitting. Don't care much about
                          >the noise when i am Talking hi hi !!!. ;-).
                          >This arrangement worked for me with a IRF510
                          >based 10 W RF amp with a similar heat sink and
                          >fan . A better albeit a bit more complex but
                          >simpler than a temp control would be to have a
                          >delayed cutoff to the fan after transmission.
                          >Sanath
                          >
                          >
                          >
                          >From: Sid Boyce <sboyce@...>
                          >To: softrock40@yahoogroups.com
                          >Sent: Monday, March 19, 2012 3:28 PM
                          >Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                          >
                          >
                          >I didn't go for temperature sensing, preferring quiet continuous running.
                          >73 ... Sid.
                          >
                          >On 19/03/12 20:16, MIKE DURKIN wrote:
                          >>
                          >>AHHHhhh ... thought you might have some temp
                          >>sencing going on .. nope, its just a speed controll ...
                          >>
                          >>Ok thanks for posting it.
                          >>
                          >>Mike KC7NOA
                          >>
                          >>
                          >>----------
                          >>To: <mailto:softrock40@yahoogroups.com>softrock40@yahoogroups.com
                          >>From: <mailto:sboyce@...>sboyce@...
                          >>Date: Mon, 19 Mar 2012 19:10:58 +0000
                          >>Subject: Re: [softrock40] 20W Amplfiers ....what, another one [2 Attachments]
                          >>
                          >>
                          >>[Attachment(s) from Sid Boyce included below]
                          >>Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html .
                          >>Some years ago I bought a 13.8V PS that got
                          >>exceedingly hot to touch, now even running
                          >>silently 24/7 it's very cool. I mount the LM317
                          >>on a piece of aluminium to act as a heatsink or
                          >>a small TO220 heatsink but it doesn't need to be for small fans.
                          >>
                          >>I use this circuit anywhere where I need quiet cooling.
                          >>The 220 ohm resistor and the LED can be left out.
                          >>
                          >>I used components to hand for the used with the 20W PA.
                          >>I had a 330 ohm and a 5K variable after a quick
                          >>rummage through a parts box so I used them. The
                          >>.JPG is similar, showing component values are not critical.
                          >>73 ... Sid.
                          >>
                          >>On 19/03/12 14:41, MIKE DURKIN wrote:
                          >>
                          >>
                          >>Care to share the design of the fan control?.... ( I have lots of LM317T's)
                          >>
                          >>-----Original Message-----
                          >>
                          >>From: Sid Boyce
                          >>Sent: 19 Mar 2012 12:12:30 GMT
                          >>To: <mailto:softrock40@yahoogroups.com>softrock40@yahoogroups.com
                          >>Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                          >>
                          >>
                          >>I installed some headers on the board where I
                          >>can apply jumpers or quick solder the attenuator resistors.
                          >>
                          >>I also made up a fan speed controller to
                          >>quieten the fan noise - using a LM317T and a few components.
                          >>Close up PC fans at full pelt are incredibly noisy.
                          >>73 ... Sid.
                          >>
                          >>On 19/03/12 02:04, Kees & Sandy wrote:
                          >>
                          >>Sounds good ! Be sure and put the jumper in if
                          >>you are not using the attenuator resistors.
                          >>73 Kees K5BCQ
                          >>
                          >>---------- Original Message ----------
                          >>From: Sid Boyce <mailto:sboyce@...><sboyce@...>
                          >>To: <mailto:softrock40@yahoogroups.com>softrock40@yahoogroups.com
                          >>Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                          >>Date: Mon, 19 Mar 2012 00:08:01 +0000
                          >>
                          >>
                          >>Hi Kees,
                          >>Got mine built some days ago, just need to make up coax ends and test.
                          >>A job for tomorrow.
                          >>73 ... Sid.
                          >>
                          >>On 18/03/12 21:44, Kees & Sandy wrote:
                          >>
                          >>Speaking of 20W Amplifiers and kits here is my
                          >>entry into the foray.......It's kit #15 on my
                          >>website http://www.qsl.net/k5bcq/Kits/Kits.html
                          >>73 Kees K5BCQ
                          >>
                          >>
                          >>
                          >>
                          >>Switch to:
                          >><mailto:softrock40-traditional@yahoogroups.com?subject=Change%20Delivery%20Format:%20Traditional>Text-Only,
                          >><mailto:softrock40-digest@yahoogroups.com?subject=Email%20Delivery:%20Digest>Daily
                          >>Digest •
                          >><mailto:softrock40-unsubscribe@yahoogroups.com?subject=Unsubscribe>Unsubscribe
                          >>•
                          >
                          >Cecil
                          >k5nwa
                          ><
                          ><http://www.softrockradio.org/>http://www.softrockradio.org/
                          > > < http://thepartsplace.k5nwa.com/ >
                          >< http://parts.softrockradio.org/ >
                          >
                          >Never take life seriously. Nobody gets out alive anyway.
                        • Sid Boyce
                          That s why I have to do a clean out of laptops and PC s occasionally, but the PA is a much simpler job. I know there are alternatives but I needed to put
                          Message 14 of 14 , Mar 19, 2012
                            That's why I have to do a clean out of laptops and PC's occasionally, but the PA is a much simpler job.
                            I know there are alternatives but I needed to put together something quickly.
                            73 ... Sid.

                            On 19/03/12 21:58, S.Sanath Kumar wrote:  
                            Rolling stone gathers no moss, but a running fan definitely gathers dust. I link up the PA fan to the PPT  and this way the fan is operational when its transmitting.  Don't care much about the noise when i am Talking  hi hi !!!.  ;-). This arrangement worked for me with a IRF510 based 10 W RF amp with a similar heat sink and fan . A better albeit a bit more complex but simpler than a temp control would be to have a delayed cutoff to the fan after transmission.
                            Sanath



                            From: Sid Boyce <sboyce@...>
                            To: softrock40@yahoogroups.com
                            Sent: Monday, March 19, 2012 3:28 PM
                            Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                             
                            I didn't go for temperature sensing, preferring quiet continuous running.
                            73 ... Sid.

                            On 19/03/12 20:16, MIKE DURKIN wrote:
                             
                            AHHHhhh ... thought you might have some temp sencing going on .. nope, its just a speed controll ...
                             
                            Ok thanks for posting it.
                             
                            Mike KC7NOA
                             

                            To: softrock40@yahoogroups.com
                            From: sboyce@...
                            Date: Mon, 19 Mar 2012 19:10:58 +0000
                            Subject: Re: [softrock40] 20W Amplfiers ....what, another one [2 Attachments]

                             
                            [Attachment(s) from Sid Boyce included below] Not my original circuit -http://www.e-dan.co.uk/pc/fancontrol.html .
                            Some years ago I bought a 13.8V PS that got exceedingly hot to touch, now even running silently 24/7 it's very cool. I mount the LM317 on a piece of aluminium to act as a heatsink or a small TO220 heatsink but it doesn't need to be for small fans.

                            I use this circuit anywhere where I need quiet cooling.
                            The 220 ohm resistor and the LED can be left out.

                            I used components to hand for the used with the 20W PA.
                            I had a 330 ohm and a 5K variable after a quick rummage through a parts box so I used them. The .JPG is similar, showing component values are not critical.
                            73 ... Sid.

                            On 19/03/12 14:41, MIKE DURKIN wrote:
                             

                            Care to share the design of the fan control?.... ( I have lots of LM317T's)

                            -----Original Message-----

                            From: Sid Boyce
                            Sent: 19 Mar 2012 12:12:30 GMT
                            To: softrock40@yahoogroups.com
                            Subject: Re: [softrock40] 20W Amplfiers ....what, another one

                             
                            I installed some headers on the board where I can apply jumpers or quick solder the attenuator resistors.

                            I also made up a fan speed controller to quieten the fan noise - using a LM317T and a few components.
                            Close up PC fans at full pelt are incredibly noisy.
                            73 ... Sid.

                            On 19/03/12 02:04, Kees & Sandy wrote:
                             
                            Sounds good ! Be sure and put the jumper in if you are not using the attenuator resistors.
                            73 Kees K5BCQ

                            ---------- Original Message ----------
                            From: Sid Boyce <sboyce@...>
                            To: softrock40@yahoogroups.com
                            Subject: Re: [softrock40] 20W Amplfiers ....what, another one
                            Date: Mon, 19 Mar 2012 00:08:01 +0000

                             
                            Hi Kees,
                            Got mine built some days ago, just need to make up coax ends and test.
                            A job for tomorrow.
                            73 ... Sid.

                            On 18/03/12 21:44, Kees & Sandy wrote:
                             
                            Speaking of 20W Amplifiers and kits here is my entry into the foray.......It's kit #15 on my website  http://www.qsl.net/k5bcq/Kits/Kits.html
                            73 Kees K5BCQ



                            Switch to: Text-Only, Daily Digest • Unsubscribe • Terms of Use
                            .


                            Replyto sender | Reply to group | Replyvia web post | Start a New Topic
                            .



                            -- 
                            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
                            
                          • Your message has been successfully submitted and would be delivered to recipients shortly.