Monday, 12 October 2015

[Amateur-repairs] Re: Test and diagnose a couple of Heathkit signal generators?

 

Make sure that you turn on the audio modulation when trying to receive
the signal generator on a radio.
If you have audio modulation off all you'll hear is a "Dead" spot on the
frequency of the generator. With
the audio modulation on you should hear a 400-600Hz tone.

Most of these signal generators are pretty solid simple circuits. I was
just looking into my old HK SG
yesterday and there are 3 Electrolytic capacitors. While these are
probably good I'll probably go ahead and
replace them soon since they are the most likely failure items in these
units.

The SG8 does have a selenium rectifier that is an accident waiting to
happen. It can be replaced with a
1N4001 type diode and a ~50 Ohm, 5 watt resistor in series to match the
loss of the selenium unit.

Search for a web site called Boat Anchor Manual Archive on the web and
you can download the manual
from them for free.

Will
WI5LL

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Posted by: Will Wasson <will.wasson@yahoo.com>
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