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