[Heathkit] SB-201 AMP

Mon, 6 Jan 2003 13:17:04 -0500

There could be a relation between leaky caps and a transformer ready to let
go if you keep at it.
Dont turn on again until it is fixed.
The key up voltage is 2500V;  key down; around 2100 on a stiff 240VAC line,
a bit less on 120V.
The voltage metering resistors also change value over time as they are run
way over ratings.
If you dont want to get into it drop me an EMail, I do those amps in my
sleep.

Carl

----- Original Message -----
From: "Ronald A Pfeiffer" <[email protected]>
To: <[email protected]>
Sent: Monday, January 06, 2003 10:30 AM
Subject: [Heathkit] SB-201 AMP

>
>
>
>
> Acquired an SB-201 in great conition but the 572's are really weak and  2
> of the
> caps in the bank are blistered!  Is there a relationship between the weak
> tubes
> and the caps?  Still get 1900 volts from power supply, do the caps need
> replacing?
> The front panel meter reads lower voltage than is really there.  Is this
> normal?
> I've been involved in QRP so this is my first venture into NOT QRP!
> Also where to replace the 572's ?
>
> Thanks in advance for info.
>
> Ron - N1ZSW
>
>
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