[TenTec] TT Centurion AMP failure

[Phil Chambley Sr.]

Well, if the keying line is shorted, it should draw the standard quiescent 
current.

Must be something on the QSK/cathode board.

Phil C. Sr.
k4dpk


----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at weather.net>
To: <tentec at contesting.com>
Sent: Wednesday, February 17, 2010 8:32 PM
Subject: Re: [TenTec] TT Centurion AMP failure


> On Wed, 2010-02-17 at 23:29 +0000, Mike Schatzberg wrote:
>> The triodes are a zero bias tube, and 200 mils sounds close for no bias 
>> voltage. The amp should still make power, although in the wrong class of 
>> service. If it does make power, you have lost your cut off bias voltage 
>> and will have to trouble shoot that circuit. If both tubes are glowing 
>> about the same color, good chance the bias supply is your problem or your 
>> bias voltage switching. 73 and Happy DXing, Mike W2AJI Tryon NC
>>
>>
> Or the keying line is stuck keyed to transmit. Might be a cable or the
> driver, not the PA.
>
> 73, Jerry, K0CQ
>
>
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