HX-20 balanced modulator

[Mark Graalman WB8JKR]

  Hi Greg,

  Ordinary 1N34A's would more than likely work fine, but
the HP 2800 series hot carrier diodes would be a bit better
if you can locate them, Dan's small parts used to carry them.
 Before attacking the diodes, I'd make sure you have USB and
LSB carrier (BFO) signal at the balanced modulator.

73,  Mark  WB8JKR


On Wed, 31 Mar 2004 21:33:02 -0500 Gregory S Poel <gspoel at CMSENERGY.COM>
writes:
> Can anyone recommend suitable replacement diodes for the balanced
> modulator in the HX-20 and where to purchase them? The original
> diodes
> were encapsulated as a matched pair and I believe were the same ones
> that
> were used in the HX-10(Maurader). My transmitter works fine on CW
> but has
> no output on SSB . The speech amplifier stages seem ok, but theres
> no
> signal coming out of the crystal filter, so it would appear it's
> either
> the diodes or the crystal filter itself.  Any other suggestions
> would be
> appreciated. Thanks, Greg  W8GP
>
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