dx-60 one down, one to go

[Stephen C. Finch]

Greg,

I would beg, borrow, or steal an oscilloscope and trace the audio from the mic
input all the way through the circuitry involved in the modulation.  This should
isolate where the audio signal is lost.  From there it is making sure all of the
components, including the tube are functioning, i.e. all voltages on the tubes
are correct, audio signals appear where they are supposed to be.  Since audio
signals are passed through capacitors, I would look very carefully at all
capacitors used to block dc and pass the audio.  Also, a biasing resistor may be
open or too low in resistance and passing too much audio to ground.

Good luck,

Steve Finch
AI0W

GREGORY HEATH wrote:

>     The only problem I now face, is that I have a carrier, but no
> modulation.  I can transmit a clean cw note, but when I hook up the  D-104,
> there is no voice on the carrier.  Back to the drawing board.  The rig loads
> up fine.  Maybe it is one of the tubes.   Although I just replaced them.
> Any ideas?  Greg.
>
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