[TenTec] Care and Feeding of Centurions
Bob McGraw - K4TAX
RMcGraw at Blomand.net
Sun Feb 2 21:53:37 EST 2014
Just go to his website. For every amp I've updated or restored I've
included his design and materials for parasitic suppressors. I also include
a "glitch" resistor if not in the original design.
----- Original Message -----
From: "Bry Carling" <bcarling at cfl.rr.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, February 02, 2014 8:37 PM
Subject: Re: [TenTec] Care and Feeding of Centurions
> Good to know. I would like to see the Measures mod.
> Best regards - Bry Carling
>> On Feb 2, 2014, at 9:39 PM, "Bob McGraw - K4TAX" <RMcGraw at Blomand.net>
>> I've had two of the 422 Centurions. Always tuned them and operated them
>> to "full tilt boogie" power out. The older one purchased new by me in
>> 1991 still has the original tubes, original filter caps, original fan and
>> produces between 1200 and 1400 watts output depending on band.
>> The newer one has had a tube replacement as the fellow that had it before
>> me abused the amp. I put in a new matched pair of 3-500's and changed
>> the parasitic suppressors to the Rich Measures design. I find the amp
>> tunes much smoother, no flash-over events noted and makes more than 1200
>> watts out on all bands including 10M.
>> Bob, K4TAX
>> ----- Original Message ----- From: "Richards" <jrichards at k8jhr.com>
>> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>> Sent: Sunday, February 02, 2014 5:53 PM
>> Subject: Re: [TenTec] Care and Feeding of Centurions
>>> Whoa... THANKS FOR ALL THE PROMPT ANSWERS !!
>>> 1) I will follow the recommended internal check. I will enlist the
>>> oversight of a local Elmer who retired from designing radio gear for
>>> Lear Jets, NASA, and the Air Force. He looks over my shoulder ans asks
>>> a lot of questions, like the Professor in a college physics lab. He
>>> won't do it, but he watches and quizzes me as I go along, so I learn a
>>> 2) I will locate the referenced QST article, and be careful it applies
>>> to this type of amp.
>>> 3) I get the point that proper handling is the key to longevity. I
>>> never run it over 600 watts and watch the meters carefully. I received
>>> good advice on proper tuning from this group when I purchased it, so I
>>> got off to a good start. I never push it, as I am serious about being a
>>> courteous and good operator, with a good clean signal. Similarly, I
>>> buy big cars with big engines, and then run them easy, usually owning a
>>> car for up to fifteen years. ... Well... OK... that is, most of the
>>> time... occasionally, I take the sports cars out for a "spirited ride"
>>> because, like a good racing or hunting hound, they need the exercise...
>>> 4) As for a spare transformer... sheesh... while I take the point
>>> seriously... I don't expect to last another 20 years! My wife says, we
>>> agreed "... until death do us part..." which she says could come
>>> sooner or later... so all bets are off!
>>> Thanks, again.
>>> ------------------------------ JHR -------------------------
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