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Re: Ensemble RXTX Local Oscillator Stage

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  • N2BHA
    Disregard my last transmission hi hi. Stupid error in hookup to scope and frequency counter. I am seeing what I should see from the secondary. Apologies and
    Message 1 of 2 , Nov 25, 2012
      Disregard my last transmission hi hi.
      Stupid error in hookup to scope and frequency counter. I am seeing
      what I should see from the secondary.

      Apologies and Many Thanks,
      Vaughn N2BHA

      --- In softrock40@yahoogroups.com, "N2BHA" <n2bha@...> wrote:
      >
      >
      > Yesterday I had some time so I began work on this kit and assembled and tested through the Local Oscillator stage. Everything checked out as far as the tests are concerned. I also tested pin 1 of the OptoIsolator and noted that it was about 20mv and with PTT activated I was getting around 1.2V.
      >
      > My question is, shouldn't I be able to see something of the oscillator output across the secondary of T1 at this point? I was looking at the full schematic and I can see the clock of the Si570 coupled to the primary via coupling cap C76. Looks to me that I should be able to see something of the oscillator at the hairpin of R12. I am seeing nothing. Am I missing something?
      >
      > Many Thanks in Advance,
      > Vaughn N2BHA
      >
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