Hi Carl:
I remember the problem, but I can't find the "Heath App Notes" I had saved on
one my old machines.
Maybe you could give a little more info for the "NEWBIES" on the list.
I have 10 old HD's I would go thru to find my old "Heath App Notes" directory
!!!
Maybe you can do a better retrieval job than me :-) !!!!
73 Bob, K1VU
FDN42ma
At 08:22 PM 4/23/2013, Carl wrote:
>Early 220's had a problem with shorting the filament/bias transformer if it
>was wired for 115V and the zener shorted. There is a change notice on the web.
>
>Carl
>KM1H
>
>
>----- Original Message ----- From: "mike stokes" <mike9v@gmail.com>
>To: "Amps" <amps@contesting.com>
>Sent: Tuesday, April 23, 2013 6:28 PM
>Subject: [Amps] SB-220 help
>
>
>>I just picked up a used non working SB-220. Suppoesdly the filament
>>transformer smoked. Still have to pull it apart and see what is going
>>on inside. Tubes are supposedly still good.
>>
>>The question I have is it possible/likely that a tube failure caused
>>the filament transformer to smoke ? What is the best way to check the
>>tubes to insure they don't cause more problems ?
>>
>>Thanks in advance.
>>
>>--
>>Mike Stokes
>>KK9V
>>_______________________________________________
>>Amps mailing list
>>Amps@contesting.com
>>http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>>-----
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>
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