sb200

[Kenneth G. Gordon]

On 3 Jun 2010 at 20:41, Jack Schrader wrote:

> I have finally gotten my sb200 to work after installing the Harbach
> soft start

Neither the SB-200 nor the SB-220 need soft-start modules. There is 
a form of "soft-start" built into Heathkit's choice of power transformers. 
Installing any soft-start module in either amp is a waste of time and 
money.

> and power modules. Everything is working ok except on 40m
> and its output is low, but that is another story.

Fill us in.

> Meter reading are ok except  for plate current and it does not move on
> any of the bands. Any ideas what I should look at that might cause
> this problem? I can't figure out what is connected in the plate
> position.

Well, as someone else says here, if your amp is working at all, then 
obviously there is plate current.

Check to see that the "hot" (ungrounded) end of R-12 is (also) 
connected to R-14, that R-14 is connected to pin 7 of the meter 
switch, that pin 8 of the meter switch is connected to ground.

If all those are correct, then perhaps there is something wrong at the 
switch itself, like a burned or bent contact.

Keep us informed.

Ken Gordon W7EKB

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