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Re: [softrock40] Softrock RXTX no RX

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  • Alan
    ... Subject: Re: [softrock40] Softrock ensemble ii no audio check the coils that are common. ... Matt, Right now I don t get that site. But I should have said
    Message 1 of 1 , Jul 25, 2012
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      ----- Original Message -----
      Subject: Re: [softrock40] Softrock ensemble ii no audio

      check the coils that are common.
      > I got a hump when touching U10 pin 2. But nothing on U11.
      > I added a screenshot to http://files.technoamge.net/softrock

      Matt, Right now I don't get that site.
      But I should have said PSDR is not the best software to use. If you use SDR# or HDSDR you can tune to the middle and hear the
      effects of touching pins.
      When I tried I heard hum when I touched all the pins I listed.

      > I checked that I had continuity on all of the coils when I installed them.
      > Is the 3 turns to the inch a minimum or a maximum? Would more turns to the
      > inch cause a problem?

      This is not important, it will work with no twisting.

      > Is it possible to check anything with an RF probe, that being one of the few
      > diagnostic tools that I do have?

      No, a probe will not normally be sensitive enough. And you need to provide a known signal.

      > Or should I just pull L2, L3, T6, L4 and T5 off the board and rewind them?

      ...... ! I've just realised you are talking RXTX. Do not "hijack" a thread, the subject line needs changing.
      But up to now it makes no difference.
      If the hum tests work then examine T5. Then re-check Robby's RF I/O and Switching page.

      A fault causing no reception on RX/TX Softrocks can be due to faulty BS170s, used as switches in the antenna changeover. Bob's
      drawing of the switching in the PDF. http://groups.yahoo.com/group/softrock40/files/G8VOI/ Ensemble RXTX PTT fault finding. One
      way of testing can be to lift the end of L4 that goes to Q10 Q11. Connect the antenna to the free end.

      73 Alan G4ZFQ
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