[TenTec] Centurion 422

[pfizenmayer]

Nope - the meters drop 2.38 volts at 1 ma - 2380 ohms and are fed from 
fairly large series resistors so the 3.3 volt zeners are fine - in addition 
the forward diode tends to damp the meters some as they are pretty undamped.

Hank K7HP

> Most meter coils drop less than 0.1 volt so 3.3 volt zener's aren't much
> protection. Better to use 1N4001 single junction silicon diodes, two in
> parallel opposite polarity. They won't leak any current until the drop
> gets up to about .55 volt.
>
> 73, Jerry, K0CQ
>>
>> 73 de hank K7HP
>>
>>
>>
>>
>>
>>
>> ----- Original Message -----
>> From:<w7ju at cox.net>
>> To:<tentec at contesting.com>
>> Sent: Wednesday, December 15, 2010 3:45 PM
>> Subject: [TenTec] Centurion 422
>>
>>
>>> I had a 3 500Z  Gas and blow a line fuse.  Replaced the one tube.  On 
>>> turn
>>> on in standby plate voltage is 3100 but show .2 ma plate current.
>>> Suggestions?
>>> Thanks
>>> Ralph   W7JU
>>> _______________________________________________
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>>
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