[Amps] SB-1000 - 3-500Z restoration

[Gudguyham at aol.com]

In a message dated 2/11/04 12:33:57 AM Eastern Standard Time, kb1gfv at arrl.net 
writes:


> I am getting old, but before I replace the switch I thouht I check the 
> idilling plate current (80 as specified) by shorting the keying line to 
> ground.  Now that I have replaced the switch I get an idling plate 
> current of 150.  I am wondering what this might fortell or what I might 
> check if all is not well???
> 
> Thanks for any help.
> Tim
> W1WCI
> 
> 

Tim, if you are getting more idle current than is specified then your zener 
diode has gone.  I don't recall if they use that electronic baising on that 
amp, but if they do, whatever sets the bias voltage is gone.  I would look at 
that component first of all.  Good Luck 73 Louie