ALC considerations with SB-200 and TS-430S

[Sir Robin]

KE3OK wrote:

> I just received my spiffy _new_ SB-200 amplifier today.  I'm using a
> TS-430S as an exciter.  The 430 requires -8 to-10 VDC for ALC.  After
> searching through the Heathkit manual I can't find anywhere that states the
> ALC voltage of the SB-200.  Does anyone know?  Do I dare fire up the amp
> and try to take a voltage reading from the ALC jack?

Al,

There is a mod the is in the Heath archives that suggests placing an
8volt zener across the ALC out of the amp to limit the voltage excursion
when driving the amp woith a Kenwood xciter.  I measured my SB-200 that
I recently acquired, as I was interested in whether it would interface
to the Drake C-line.  Voltage measured was about 4.5 volts tops no
matter how hard I drove it.  I do think that there is a problem with my
internals and I intend to take a look at it when I tear it apart to put
in some mods.

That's all I have....GL....Rick...W5RH

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