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Re: Ensemble RXTX audio levels

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  • serracin7388
    Warren, Thanks. I will be checking both the dc and rf voltages at the driver as well. Alan has also some interesting reference voltages. Paul
    Message 1 of 27 , Mar 28, 2013
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      Warren,
      Thanks.

      I will be checking both the dc and rf voltages at the driver as well. Alan has also some interesting reference voltages.

      Paul

      --- In softrock40@yahoogroups.com, "warrenallgyer" <allgyer@...> wrote:
      >
      > I am happy to do that Paul but I am not sure it is very helpful.
      >
      > Q6 receives S12V so there is not voltage on the device on Receive.
      >
      > On Transmit, with no drive applied, I measure 1.96 VDC at the base and 1.26 at the emitter.
      >
      > Note: This is with a 13.8 VDC supply (which is another strong recommendation). With 12 VDC the voltages would be correspondingly lower.
      >
      > Warren Allgyer - W8TOD
      >
      > --- In softrock40@yahoogroups.com, "serracin7388" <pawlud@> wrote:
      > >
      > > I have checked the existing fets and they are matched up to two decimal points.
      > >
      > > What is worth mentioning is that there is no mention in the notes ( or I have not seen it ) of the voltages at the base & emitter of Q6, the 2N222 driver. Would it be possible to check it out for me please, on your rig, on both rx &tx ?
      > >
      > > However, it does mention that the audio input should be 2.4 pp, meaning 0.8 volts rms for full RF out !
      > >
      > > Paul
      > >
      > >
      > >
      > > --- In softrock40@yahoogroups.com, "warrenallgyer" <allgyer@> wrote:
      > > >
      > > > Paul
      > > >
      >
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