diode replacement

[Stephen C. Finch]

Jim,

There are several circuits in the ARRL handbooks and other sources which show a
diode ring balanced modulator.  Some of them use 1N914s, others use diodes that
are better matched.  I suggest you look at some of those circuits for ideas and
which diodes you want to use.

Steve Finch
AI0W

n7kbj wrote:

> Hi all - I'm still trying to solve the problem of my carrier that won't null
> in my hw-101.  I've now replaced the 200 ohm null pot, and that improved, but
> didn't fix the problem.  So I guess the next step is to replace the 4 diodes
> in the null circuit.  So, here's my question:
> the manual simply lists these diodes as 'crystal diodes', heath part no.
> 56-26-1.  In todays parlence, what am I looking for to replace them with, and
> how much of a voltage/current rating do I need??
> And while I'm looking for advice, does anyone know of a source for the slip-on
> type tube shields that were used in the hw-101?  the tube sockets don't have
> the lugs for the 'twist and lock'  type of shields.
> Thanks in advance!
> Jim - N7KBJ
>
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