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Re: how to buy si570.

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  • Christos Nikolaou
    Luis, You can also have Si570 from www.box73.de they can provide not only the plain grade-C but also grade-B with the extended frequency range. 73, Christos
    Message 1 of 20 , Dec 31, 2008
      Luis,

      You can also have Si570 from www.box73.de they can provide not only
      the plain grade-C but also grade-B with the extended frequency range.

      73,
      Christos SV1EIA



      --- In powersdr-iq@yahoogroups.com, Luis Cupido <cupido@...> wrote:
      >
      > tks,
      > lc
      >
      >
      > Alan wrote:
      > > ----- Original Message -----
      > > From: "Luis Cupido"
      > >
      > >> Is there an easy way to buy si570's ?
      > >> tks.
      > >
      > > http://www.softrockradio.org/si570 and
      > > http://www.sdr-kits.net/
      > >
      > > 73 Alan G4ZFQ
      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      >
    • Luis Cupido
      Mny.Tks. Indeed I m willing to get the B Geeeeeee, wish it was cheaper :-( 73 s Luis Cupido. ct1dmk.
      Message 2 of 20 , Jan 1, 2009
        Mny.Tks.
        Indeed I'm willing to get the B
        Geeeeeee, wish it was cheaper :-(

        73's

        Luis Cupido.
        ct1dmk.


        Christos Nikolaou wrote:
        > Luis,
        >
        > You can also have Si570 from www.box73.de they can provide not only
        > the plain grade-C but also grade-B with the extended frequency range.
        >
        > 73,
        > Christos SV1EIA
        >
        >
        >
        > --- In powersdr-iq@yahoogroups.com, Luis Cupido <cupido@...> wrote:
        >> tks,
        >> lc
        >>
        >>
        >> Alan wrote:
        >>> ----- Original Message -----
        >>> From: "Luis Cupido"
        >>>
        >>>> Is there an easy way to buy si570's ?
        >>>> tks.
        >>> http://www.softrockradio.org/si570 and
        >>> http://www.sdr-kits.net/
        >>>
        >>> 73 Alan G4ZFQ
        >>>
        >>> ------------------------------------
        >>>
        >>> Yahoo! Groups Links
        >>>
        >>>
        >>>
        >>>
        >
        >
        >
        > ------------------------------------
        >
        > Yahoo! Groups Links
        >
        >
        >
        >
      • Luis Cupido
        Hi, Anyone out there knows anything similar to the silabs osc but using an external quartz. The possibility of locking the radio to a 10MHz external reference
        Message 3 of 20 , Jan 1, 2009
          Hi,

          Anyone out there knows anything similar to the
          silabs osc but using an external quartz.
          The possibility of locking the radio to a 10MHz
          external reference is something I would like.

          (I say some cypress chips but they did not convincved
          me)

          Any thoughts ?

          Luis Cupido.
          ct1dmk.


          Luis Cupido wrote:
          > Mny.Tks.
          > Indeed I'm willing to get the B
          > Geeeeeee, wish it was cheaper :-(
          >
          > 73's
          >
          > Luis Cupido.
          > ct1dmk.
          >
          >
          > Christos Nikolaou wrote:
          >> Luis,
          >>
          >> You can also have Si570 from www.box73.de they can provide not only
          >> the plain grade-C but also grade-B with the extended frequency range.
          >>
          >> 73,
          >> Christos SV1EIA
          >>
          >>
          >>
          >> --- In powersdr-iq@yahoogroups.com, Luis Cupido <cupido@...> wrote:
          >>> tks,
          >>> lc
          >>>
          >>>
          >>> Alan wrote:
          >>>> ----- Original Message -----
          >>>> From: "Luis Cupido"
          >>>>
          >>>>> Is there an easy way to buy si570's ?
          >>>>> tks.
          >>>> http://www.softrockradio.org/si570 and
          >>>> http://www.sdr-kits.net/
          >>>>
          >>>> 73 Alan G4ZFQ
          >>>>
          >>>> ------------------------------------
          >>>>
          >>>> Yahoo! Groups Links
          >>>>
          >>>>
          >>>>
          >>>>
          >>
          >>
          >> ------------------------------------
          >>
          >> Yahoo! Groups Links
          >>
          >>
          >>
          >>
          >
          > ------------------------------------
          >
          > Yahoo! Groups Links
          >
          >
          >
          >
        • Luis Cupido
          I saw some cypress chips but they did not convinced me. (typos)
          Message 4 of 20 , Jan 1, 2009
            I saw some cypress chips but they did not convinced
            me. (typos)

            Luis Cupido wrote:
            > Hi,
            >
            > Anyone out there knows anything similar to the
            > silabs osc but using an external quartz.
            > The possibility of locking the radio to a 10MHz
            > external reference is something I would like.
            >
            > (I say some cypress chips but they did not convincved
            > me)
            >
            > Any thoughts ?
            >
            > Luis Cupido.
            > ct1dmk.
            >
            >
            > Luis Cupido wrote:
            >> Mny.Tks.
            >> Indeed I'm willing to get the B
            >> Geeeeeee, wish it was cheaper :-(
            >>
            >> 73's
            >>
            >> Luis Cupido.
            >> ct1dmk.
            >>
            >>
            >> Christos Nikolaou wrote:
            >>> Luis,
            >>>
            >>> You can also have Si570 from www.box73.de they can provide not only
            >>> the plain grade-C but also grade-B with the extended frequency range.
            >>>
            >>> 73,
            >>> Christos SV1EIA
            >>>
            >>>
            >>>
            >>> --- In powersdr-iq@yahoogroups.com, Luis Cupido <cupido@...> wrote:
            >>>> tks,
            >>>> lc
            >>>>
            >>>>
            >>>> Alan wrote:
            >>>>> ----- Original Message -----
            >>>>> From: "Luis Cupido"
            >>>>>
            >>>>>> Is there an easy way to buy si570's ?
            >>>>>> tks.
            >>>>> http://www.softrockradio.org/si570 and
            >>>>> http://www.sdr-kits.net/
            >>>>>
            >>>>> 73 Alan G4ZFQ
            >>>>>
            >>>>> ------------------------------------
            >>>>>
            >>>>> Yahoo! Groups Links
            >>>>>
            >>>>>
            >>>>>
            >>>>>
            >>>
            >>> ------------------------------------
            >>>
            >>> Yahoo! Groups Links
            >>>
            >>>
            >>>
            >>>
            >> ------------------------------------
            >>
            >> Yahoo! Groups Links
            >>
            >>
            >>
            >>
            >
            > ------------------------------------
            >
            > Yahoo! Groups Links
            >
            >
            >
            >
          • Dave - WB6DHW
            How about the Si571. It is an Si570 with an FM input to the VCO. Dave - WB6DHW
            Message 5 of 20 , Jan 1, 2009
              How about the Si571. It is an Si570 with an FM input to the VCO.

              Dave - WB6DHW
              <http://wb6dhw.com>

              Luis Cupido wrote:
              > I saw some cypress chips but they did not convinced
              > me. (typos)
              >
              > Luis Cupido wrote:
              >
              >> Hi,
              >>
              >> Anyone out there knows anything similar to the
              >> silabs osc but using an external quartz.
              >> The possibility of locking the radio to a 10MHz
              >> external reference is something I would like.
              >>
              >> (I say some cypress chips but they did not convincved
              >> me)
              >>
              >>
            • Graham Haddock
              Luis: What range of output frequencies do you want? A DDS like a 9951 can directly use a 10 MHz input and put out frequencies up to 200 MHz or so. ... ==
              Message 6 of 20 , Jan 1, 2009
                Luis:
                What range of output frequencies do you want?
                A DDS like a 9951 can directly use a 10 MHz
                input and put out frequencies up to 200 MHz or so.
                --- Graham / KE9H

                ==

                Luis Cupido wrote:
                >
                > Hi,
                >
                > Anyone out there knows anything similar to the
                > silabs osc but using an external quartz.
                > The possibility of locking the radio to a 10MHz
                > external reference is something I would like.
                >
                > (I say some cypress chips but they did not convincved
                > me)
                >
                > Any thoughts ?
                >
                > Luis Cupido.
                > ct1dmk.
                >
                > Luis Cupido wrote:
                > > Mny.Tks.
                > > Indeed I'm willing to get the B
                > > Geeeeeee, wish it was cheaper :-(
                > >
                > > 73's
                > >
                > > Luis Cupido.
                > > ct1dmk.
                > >
                > >
                > > Christos Nikolaou wrote:
                > >> Luis,
                > >>
                > >> You can also have Si570 from www.box73.de they can provide not only
                > >> the plain grade-C but also grade-B with the extended frequency range.
                > >>
                > >> 73,
                > >> Christos SV1EIA
                > >>
                > >>
                > >>
                > >> --- In powersdr-iq@yahoogroups.com
                > <mailto:powersdr-iq%40yahoogroups.com>, Luis Cupido <cupido@...> wrote:
                > >>> tks,
                > >>> lc
                > >>>
                > >>>
                > >>> Alan wrote:
                > >>>> ----- Original Message -----
                > >>>> From: "Luis Cupido"
                > >>>>
                > >>>>> Is there an easy way to buy si570's ?
                > >>>>> tks.
                > >>>> http://www.softrockradio.org/si570
                > <http://www.softrockradio.org/si570> and
                > >>>> http://www.sdr-kits.net/ <http://www.sdr-kits.net/>
                > >>>>
                > >>>> 73 Alan G4ZFQ
                > >>>>
                > >>>> ------------------------------------
                > >>>>
                > >>>> Yahoo! Groups Links
                > >>>>
                > >>>>
                > >>>>
                > >>>>
                > >>
                > >>
                > >> ------------------------------------
                > >>
                > >> Yahoo! Groups Links
                > >>
                > >>
                > >>
                > >>
                > >
                > > ------------------------------------
                > >
                > > Yahoo! Groups Links
                > >
                > >
                > >
                > >
                >
                >
              • Luis Cupido
                Graham, It is the simplicity of the part that I love about the si570. Yes I can use a DDS, actually that was may initial design until I steped into this si570
                Message 7 of 20 , Jan 1, 2009
                  Graham,

                  It is the simplicity of the part that I love about
                  the si570. Yes I can use a DDS, actually that was may
                  initial design until I steped into this si570
                  now I'm all but indecisions :-(
                  I'm looking to make an I and Q LO from 28 to 146MHz.

                  Luis Cupido.
                  ct1dmk.

                  Graham Haddock wrote:
                  > Luis:
                  > What range of output frequencies do you want?
                  > A DDS like a 9951 can directly use a 10 MHz
                  > input and put out frequencies up to 200 MHz or so.
                  > --- Graham / KE9H
                  >
                  > ==
                  >
                  > Luis Cupido wrote:
                  >> Hi,
                  >>
                  >> Anyone out there knows anything similar to the
                  >> silabs osc but using an external quartz.
                  >> The possibility of locking the radio to a 10MHz
                  >> external reference is something I would like.
                  >>
                  >> (I say some cypress chips but they did not convincved
                  >> me)
                  >>
                  >> Any thoughts ?
                  >>
                  >> Luis Cupido.
                  >> ct1dmk.
                  >>
                  >> Luis Cupido wrote:
                  >>> Mny.Tks.
                  >>> Indeed I'm willing to get the B
                  >>> Geeeeeee, wish it was cheaper :-(
                  >>>
                  >>> 73's
                  >>>
                  >>> Luis Cupido.
                  >>> ct1dmk.
                  >>>
                  >>>
                  >>> Christos Nikolaou wrote:
                  >>>> Luis,
                  >>>>
                  >>>> You can also have Si570 from www.box73.de they can provide not only
                  >>>> the plain grade-C but also grade-B with the extended frequency range.
                  >>>>
                  >>>> 73,
                  >>>> Christos SV1EIA
                  >>>>
                  >>>>
                  >>>>
                  >>>> --- In powersdr-iq@yahoogroups.com
                  >> <mailto:powersdr-iq%40yahoogroups.com>, Luis Cupido <cupido@...> wrote:
                  >>>>> tks,
                  >>>>> lc
                  >>>>>
                  >>>>>
                  >>>>> Alan wrote:
                  >>>>>> ----- Original Message -----
                  >>>>>> From: "Luis Cupido"
                  >>>>>>
                  >>>>>>> Is there an easy way to buy si570's ?
                  >>>>>>> tks.
                  >>>>>> http://www.softrockradio.org/si570
                  >> <http://www.softrockradio.org/si570> and
                  >>>>>> http://www.sdr-kits.net/ <http://www.sdr-kits.net/>
                  >>>>>>
                  >>>>>> 73 Alan G4ZFQ
                  >>>>>>
                  >>>>>> ------------------------------------
                  >>>>>>
                  >>>>>> Yahoo! Groups Links
                  >>>>>>
                  >>>>>>
                  >>>>>>
                  >>>>>>
                  >>>>
                  >>>> ------------------------------------
                  >>>>
                  >>>> Yahoo! Groups Links
                  >>>>
                  >>>>
                  >>>>
                  >>>>
                  >>> ------------------------------------
                  >>>
                  >>> Yahoo! Groups Links
                  >>>
                  >>>
                  >>>
                  >>>
                  >>
                  >
                  >
                  >
                  > ------------------------------------
                  >
                  > Yahoo! Groups Links
                  >
                  >
                  >
                  >
                • Luis Cupido
                  Hi Dave, Since I want to be anywhere in frequency can t really lock it to 10MHz easily. Wish silabs made a version with external xtal also ;-). Luis Cupido.
                  Message 8 of 20 , Jan 1, 2009
                    Hi Dave,
                    Since I want to be anywhere in frequency
                    can't really lock it to 10MHz easily.
                    Wish silabs made a version with external xtal also ;-).

                    Luis Cupido.
                    ct1dmk.


                    P.S. nice design your UHFSDR congrats.



                    Dave - WB6DHW wrote:
                    > How about the Si571. It is an Si570 with an FM input to the VCO.
                    >
                    > Dave - WB6DHW
                    > <http://wb6dhw.com>
                    >
                    > Luis Cupido wrote:
                    >> I saw some cypress chips but they did not convinced
                    >> me. (typos)
                    >>
                    >> Luis Cupido wrote:
                    >>
                    >>> Hi,
                    >>>
                    >>> Anyone out there knows anything similar to the
                    >>> silabs osc but using an external quartz.
                    >>> The possibility of locking the radio to a 10MHz
                    >>> external reference is something I would like.
                    >>>
                    >>> (I say some cypress chips but they did not convincved
                    >>> me)
                    >>>
                    >>>
                    >
                    >
                    > ------------------------------------
                    >
                    > Yahoo! Groups Links
                    >
                    >
                    >
                    >
                  • Luis Cupido
                    Graham, It is the simplicity of the part that I love about the si570. Yes I can use a DDS, actually that was may initial design until I steped into this si570
                    Message 9 of 20 , Jan 1, 2009
                      Graham,

                      It is the simplicity of the part that I love about
                      the si570. Yes I can use a DDS, actually that was may
                      initial design until I steped into this si570
                      now I'm all but indecisions :-(
                      I'm looking to make an I and Q LO from 28 to 146MHz.

                      Luis Cupido.
                      ct1dmk.

                      Graham Haddock wrote:
                      > Luis:
                      > What range of output frequencies do you want?
                      > A DDS like a 9951 can directly use a 10 MHz
                      > input and put out frequencies up to 200 MHz or so.
                      > --- Graham / KE9H
                      >
                      > ==
                      >
                      > Luis Cupido wrote:
                      >> Hi,
                      >>
                      >> Anyone out there knows anything similar to the
                      >> silabs osc but using an external quartz.
                      >> The possibility of locking the radio to a 10MHz
                      >> external reference is something I would like.
                      >>
                      >> (I say some cypress chips but they did not convincved
                      >> me)
                      >>
                      >> Any thoughts ?
                      >>
                      >> Luis Cupido.
                      >> ct1dmk.
                      >>
                      >> Luis Cupido wrote:
                      >>> Mny.Tks.
                      >>> Indeed I'm willing to get the B
                      >>> Geeeeeee, wish it was cheaper :-(
                      >>>
                      >>> 73's
                      >>>
                      >>> Luis Cupido.
                      >>> ct1dmk.
                      >>>
                      >>>
                      >>> Christos Nikolaou wrote:
                      >>>> Luis,
                      >>>>
                      >>>> You can also have Si570 from www.box73.de they can provide not only
                      >>>> the plain grade-C but also grade-B with the extended frequency range.
                      >>>>
                      >>>> 73,
                      >>>> Christos SV1EIA
                      >>>>
                      >>>>
                      >>>>
                      >>>> --- In powersdr-iq@yahoogroups.com
                      >> <mailto:powersdr-iq%40yahoogroups.com>, Luis Cupido <cupido@...> wrote:
                      >>>>> tks,
                      >>>>> lc
                      >>>>>
                      >>>>>
                      >>>>> Alan wrote:
                      >>>>>> ----- Original Message -----
                      >>>>>> From: "Luis Cupido"
                      >>>>>>
                      >>>>>>> Is there an easy way to buy si570's ?
                      >>>>>>> tks.
                      >>>>>> http://www.softrockradio.org/si570
                      >> <http://www.softrockradio.org/si570> and
                      >>>>>> http://www.sdr-kits.net/ <http://www.sdr-kits.net/>
                      >>>>>>
                      >>>>>> 73 Alan G4ZFQ
                      >>>>>>
                      >>>>>> ------------------------------------
                      >>>>>>
                      >>>>>> Yahoo! Groups Links
                      >>>>>>
                      >>>>>>
                      >>>>>>
                      >>>>>>
                      >>>>
                      >>>> ------------------------------------
                      >>>>
                      >>>> Yahoo! Groups Links
                      >>>>
                      >>>>
                      >>>>
                      >>>>
                      >>> ------------------------------------
                      >>>
                      >>> Yahoo! Groups Links
                      >>>
                      >>>
                      >>>
                      >>>
                      >>
                      >
                      >
                      >
                      > ------------------------------------
                      >
                      > Yahoo! Groups Links
                      >
                      >
                      >
                      >
                    • Luis Cupido
                      Graham, It is the simplicity of the part that I love about the si570. Yes I can use a DDS, actually that was may initial design until I steped into this si570
                      Message 10 of 20 , Jan 1, 2009
                        Graham,

                        It is the simplicity of the part that I love about
                        the si570. Yes I can use a DDS, actually that was may
                        initial design until I steped into this si570
                        now I'm all but indecisions :-(
                        I'm looking to make an I and Q LO from 28 to 146MHz.

                        Luis Cupido.
                        ct1dmk.
                      • netnovel2005
                        Hello slightly off topic may be. ... My DDS-BASE can become IQ generator with two board. http://zao.jp/radio/dds-base/index_e.php This board is designed for
                        Message 11 of 20 , Jan 1, 2009
                          Hello

                          slightly off topic may be.

                          --- In powersdr-iq@yahoogroups.com, Luis Cupido <cupido@...> wrote:
                          >
                          > Graham,
                          >
                          > It is the simplicity of the part that I love about
                          > the si570. Yes I can use a DDS, actually that was may
                          > initial design until I steped into this si570
                          > now I'm all but indecisions :-(
                          > I'm looking to make an I and Q LO from 28 to 146MHz.

                          My DDS-BASE can become IQ generator with two board.

                          http://zao.jp/radio/dds-base/index_e.php

                          This board is designed for Synchronization with two AD9859.
                          Daughter board is compatible with AD9951 and AD9954.

                          But I did not write control soft yet.
                          There is source code for single chip by VB.NET.
                          I think it is easy to write control soft for syncronization.

                          I already build IQ generator with AD9834.

                          http://www.eleki-jack.com/lab/9834x2.html

                          control soft is here.

                          http://zao.jp/radio/dds34en/DDS_34x2.zip

                          I am making sdr unit with this circuit now.

                          best regards,

                          JA7TDO
                          Miura

                          >
                          > Luis Cupido.
                          > ct1dmk.
                          >
                          > Graham Haddock wrote:
                          > > Luis:
                          > > What range of output frequencies do you want?
                          > > A DDS like a 9951 can directly use a 10 MHz
                          > > input and put out frequencies up to 200 MHz or so.
                          > > --- Graham / KE9H
                          > >
                          > > ==
                          > >
                          > > Luis Cupido wrote:
                          > >> Hi,
                          > >>
                          > >> Anyone out there knows anything similar to the
                          > >> silabs osc but using an external quartz.
                          > >> The possibility of locking the radio to a 10MHz
                          > >> external reference is something I would like.
                          > >>
                          > >> (I say some cypress chips but they did not convincved
                          > >> me)
                          > >>
                          > >> Any thoughts ?
                          > >>
                          > >> Luis Cupido.
                          > >> ct1dmk.
                          > >>
                          > >> Luis Cupido wrote:
                          > >>> Mny.Tks.
                          > >>> Indeed I'm willing to get the B
                          > >>> Geeeeeee, wish it was cheaper :-(
                          > >>>
                          > >>> 73's
                          > >>>
                          > >>> Luis Cupido.
                          > >>> ct1dmk.
                          > >>>
                          > >>>
                          > >>> Christos Nikolaou wrote:
                          > >>>> Luis,
                          > >>>>
                          > >>>> You can also have Si570 from www.box73.de they can provide not only
                          > >>>> the plain grade-C but also grade-B with the extended frequency
                          range.
                          > >>>>
                          > >>>> 73,
                          > >>>> Christos SV1EIA
                          > >>>>
                          > >>>>
                          > >>>>
                          > >>>> --- In powersdr-iq@yahoogroups.com
                          > >> <mailto:powersdr-iq%40yahoogroups.com>, Luis Cupido <cupido@> wrote:
                          > >>>>> tks,
                          > >>>>> lc
                          > >>>>>
                          > >>>>>
                          > >>>>> Alan wrote:
                          > >>>>>> ----- Original Message -----
                          > >>>>>> From: "Luis Cupido"
                          > >>>>>>
                          > >>>>>>> Is there an easy way to buy si570's ?
                          > >>>>>>> tks.
                          > >>>>>> http://www.softrockradio.org/si570
                          > >> <http://www.softrockradio.org/si570> and
                          > >>>>>> http://www.sdr-kits.net/ <http://www.sdr-kits.net/>
                          > >>>>>>
                          > >>>>>> 73 Alan G4ZFQ
                          > >>>>>>
                          > >>>>>> ------------------------------------
                          > >>>>>>
                          > >>>>>> Yahoo! Groups Links
                          > >>>>>>
                          > >>>>>>
                          > >>>>>>
                          > >>>>>>
                          > >>>>
                          > >>>> ------------------------------------
                          > >>>>
                          > >>>> Yahoo! Groups Links
                          > >>>>
                          > >>>>
                          > >>>>
                          > >>>>
                          > >>> ------------------------------------
                          > >>>
                          > >>> Yahoo! Groups Links
                          > >>>
                          > >>>
                          > >>>
                          > >>>
                          > >>
                          > >
                          > >
                          > >
                          > > ------------------------------------
                          > >
                          > > Yahoo! Groups Links
                          > >
                          > >
                          > >
                          > >
                          >
                        • joe price
                          Christos, I have had some success with Dave s WB6DHW s UHFSDR project on two meters. would you please consider the following changes to your next revision.
                          Message 12 of 20 , Apr 17 9:05 AM
                            Christos,

                            I have had some success with Dave's WB6DHW's UHFSDR project on two meters. would you please consider the following changes to your next revision.

                            Add the 2 meter band selection box in the Band-HF under the S meter.

                            Keep the extended frequency box checked under General Si570 (to allow TX on 2).

                            Store TX/RX I/Q image data for 2 meters.

                            Enable the TX Sequencing time so that it's used in both directions not
                            just RX to TX. The UHFSDR board has a small transient switching from TX to RX
                            which activates the RX AGC when TIME is set to slow (SSB) Fast AGC is OK.

                            Joe wa9cgz
                            .
                          • Christos Nikolaou
                            Hi Joe, The UHFSDR kit is still sitting there in pieces in my lab pipeline... I envy that you already got the feeling of it and how the H-Mode mixer works in
                            Message 13 of 20 , Apr 17 10:00 AM
                              Hi Joe,

                              The UHFSDR kit is still sitting there in pieces in my lab pipeline...
                              I envy that you already got the feeling of it and how the H-Mode mixer works in comparisson to the QSD/QSE we were familiar with.
                              I didnt go into the trouble of building it on the beta board and patiently waiting Dave to anounce the new rectified boards.

                              Appart from the first touches on PowerSDR-IQ for UHFSDR usage I didnt had the time to incorporate the requests done so far yet. But I will, since I also want to have the H-Mode mixer experience and SDR up to UHF.

                              Although you had your Easter last week, its the Orthodox Easter here so you have my Season Greetings.

                              73,
                              Christos SV1EIA




                              --- In powersdr-iq@yahoogroups.com, "joe price" <joeprice@...> wrote:
                              >
                              > Christos,
                              >
                              > I have had some success with Dave's WB6DHW's UHFSDR project on two meters. would you please consider the following changes to your next revision.
                              >
                              > Add the 2 meter band selection box in the Band-HF under the S meter.
                              >
                              > Keep the extended frequency box checked under General Si570 (to allow TX on 2).
                              >
                              > Store TX/RX I/Q image data for 2 meters.
                              >
                              > Enable the TX Sequencing time so that it's used in both directions not
                              > just RX to TX. The UHFSDR board has a small transient switching from TX to RX
                              > which activates the RX AGC when TIME is set to slow (SSB) Fast AGC is OK.
                              >
                              > Joe wa9cgz
                              > .
                              >
                            • Dave - WB6DHW
                              Christos: The UHFSDR does not use an H mode mixer(at least if I understand what an H mode mixer is). The UHFSDR uses 2 standard double balanced mixers. The
                              Message 14 of 20 , Apr 17 10:51 AM
                                Christos:

                                The UHFSDR does not use an H mode mixer(at least if I understand what
                                an H mode mixer is). The UHFSDR uses 2 standard double balanced mixers.
                                The DBM's have about 6 dB of loss verses 1dB or less for the QSD.
                                But, DBM's are available for frequencies well into the tens of GHz. It
                                uses a quadrature LO as do all the other SDR's.

                                Dave - WB6DHW
                                <http://wb6dhw.com>

                                Christos Nikolaou wrote:
                                > Hi Joe,
                                >
                                > The UHFSDR kit is still sitting there in pieces in my lab pipeline...
                                > I envy that you already got the feeling of it and how the H-Mode mixer works in comparisson to the QSD/QSE we were familiar with.
                                > I didnt go into the trouble of building it on the beta board and patiently waiting Dave to anounce the new rectified boards.
                                >
                                > Appart from the first touches on PowerSDR-IQ for UHFSDR usage I didnt had the time to incorporate the requests done so far yet. But I will, since I also want to have the H-Mode mixer experience and SDR up to UHF.
                                >
                                > Although you had your Easter last week, its the Orthodox Easter here so you have my Season Greetings.
                                >
                                > 73,
                                > Christos SV1EIA
                                >
                                >
                                >
                                >
                                > --- In powersdr-iq@yahoogroups.com, "joe price" <joeprice@...> wrote:
                                >> Christos,
                                >>
                                >> I have had some success with Dave's WB6DHW's UHFSDR project on two meters. would you please consider the following changes to your next revision.
                                >>
                                >> Add the 2 meter band selection box in the Band-HF under the S meter.
                                >>
                                >> Keep the extended frequency box checked under General Si570 (to allow TX on 2).
                                >>
                                >> Store TX/RX I/Q image data for 2 meters.
                                >>
                                >> Enable the TX Sequencing time so that it's used in both directions not
                                >> just RX to TX. The UHFSDR board has a small transient switching from TX to RX
                                >> which activates the RX AGC when TIME is set to slow (SSB) Fast AGC is OK.
                                >>
                                >> Joe wa9cgz
                                >> .
                                >>
                              • Christos Nikolaou
                                Dave, Thanks for the intervention! Honestly I had the impression that it was an H-thing but never got the curiosity (until now) to see PA3AKE s site and have a
                                Message 15 of 20 , Apr 17 12:16 PM
                                  Dave,

                                  Thanks for the intervention!
                                  Honestly I had the impression that it was an H-thing but never got the curiosity (until now) to see PA3AKE's site and have a good read on this.
                                  You sure made me start reading the H-Mode mixer documents and try to find the differences with your design.
                                  Next time I have to be more careful. :-)

                                  73,
                                  Christos SV1EIA



                                  PS.
                                  By the way are the production boards ready to order?




                                  --- In powersdr-iq@yahoogroups.com, Dave - WB6DHW <brainerd@...> wrote:
                                  >
                                  > Christos:
                                  >
                                  > The UHFSDR does not use an H mode mixer(at least if I understand what
                                  > an H mode mixer is). The UHFSDR uses 2 standard double balanced mixers.
                                  > The DBM's have about 6 dB of loss verses 1dB or less for the QSD.
                                  > But, DBM's are available for frequencies well into the tens of GHz. It
                                  > uses a quadrature LO as do all the other SDR's.
                                  >
                                  > Dave - WB6DHW
                                  > <http://wb6dhw.com>
                                  >
                                  > Christos Nikolaou wrote:
                                  > > Hi Joe,
                                  > >
                                  > > The UHFSDR kit is still sitting there in pieces in my lab pipeline...
                                  > > I envy that you already got the feeling of it and how the H-Mode mixer works in comparisson to the QSD/QSE we were familiar with.
                                  > > I didnt go into the trouble of building it on the beta board and patiently waiting Dave to anounce the new rectified boards.
                                  > >
                                  > > Appart from the first touches on PowerSDR-IQ for UHFSDR usage I didnt had the time to incorporate the requests done so far yet. But I will, since I also want to have the H-Mode mixer experience and SDR up to UHF.
                                  > >
                                  > > Although you had your Easter last week, its the Orthodox Easter here so you have my Season Greetings.
                                  > >
                                  > > 73,
                                  > > Christos SV1EIA
                                  > >
                                  > >
                                  > >
                                  > >
                                  > > --- In powersdr-iq@yahoogroups.com, "joe price" <joeprice@> wrote:
                                  > >> Christos,
                                  > >>
                                  > >> I have had some success with Dave's WB6DHW's UHFSDR project on two meters. would you please consider the following changes to your next revision.
                                  > >>
                                  > >> Add the 2 meter band selection box in the Band-HF under the S meter.
                                  > >>
                                  > >> Keep the extended frequency box checked under General Si570 (to allow TX on 2).
                                  > >>
                                  > >> Store TX/RX I/Q image data for 2 meters.
                                  > >>
                                  > >> Enable the TX Sequencing time so that it's used in both directions not
                                  > >> just RX to TX. The UHFSDR board has a small transient switching from TX to RX
                                  > >> which activates the RX AGC when TIME is set to slow (SSB) Fast AGC is OK.
                                  > >>
                                  > >> Joe wa9cgz
                                  > >> .
                                  > >>
                                  >
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