Fw: Model HX-10 MARAUDER Balanced Modulator diode question

[Mark Graalman WB8JKR]

  I'm not at all familiar with that transmitter, but I
see no reason why a pair of 1N34's or 1N270's
wouldn't work. How is CW generated? Do they
unbalance the balanced modulator for CW? If
they do, then I would think the problem may be
no audio getting to the balanced modulator.

Mark  WB8JKR


On Tue, 9 Nov 2004 15:28:18 -0500 Ralph Daniels <rbdaniels at MSN.COM>
writes:
> Greetings All,
>
> Putting an HX-10 back in service - it operates correctly on CW but
> on AM and SSB
> there is no drive i.e., no grid current for the 6146's regardless of
> the audio input level.
> Have replaced the Speech Amp, Mixer and all Osc tubes but no change
> and the next step
> is to put it on the bench  - at a weight of 85 lbs I dread it.
>
> Anway, I was wondering if anyone knew of a source or replacement
> part number for
> the two silicon diodes used in the Balanced Modulator stage  - they
> are a matched pair of
> OA95's. This is just in case that these are the culprits!
>
> Or does anyone have some fresh ideas on this problem.
>
> Thanks in advance.
>
> Ralph Daniels
>
> N1SK - Clearwater FL, Land of the Hurricanes!
> 73's
>
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