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[Amps] WTB 572B Cetron

To: <amps@contesting.com>
Subject: [Amps] WTB 572B Cetron
From: 2 at vc.net (2)
Date: Mon May 5 08:16:33 2003

>
>
>Hi again Rich!
>
>IK7WPG has made the FL2100Z a  FL2100GI
>
>It's all in Italian, but if you don't understand that - you can understand
>the circuit diagram and the pictures, the correct way to go is:
>
>www.qsl.net/ik7wpg/home.htm
>
>Next:  click on  ''Homebrew''   at the left
>
**  I found it.  Thanks.

>Next:  Come ottenere pi? potenza da un vecchio YAESU FL-2100Z
>
>Below that is another construction with a Russian tube, but the idea
>of converting the FL2100Z out of 572B's seems good, however there
>is no input tuning, he says the tubes are 100 Ohms, which means
>two tubes = 50 ohms.  I don't think my old TenTec Corsair II will have
>anything against that... 
>
**  50-ohms is the approximate average input R.  This means that the 
input R varies from c. 18-ohms to well over 100k-ohms during the driving 
cycle.  Thus, a tuned input with a Q of 2 - 3 is needed as a flywheel.

>Sorry if I mislead you Rich, hope this will help you, that means me, hi -
>to find the article and give me an opinion.
>
have phun,  Osten
>> >
>> >Hello Rich!
>> >
>> >I have used Taylor, not better than Svetlana. The only good ones are
>> >original Cetron 572B's, but I will change to GI7B's instead. I once
>> >used your VHF-parasistics modification in a SB-200 and it was just
>> >great, I do believe in the idea!!  So did also my old friend SM6CST,
>> >Urb, now a silent key since Christmas 2001. He got his SB-220
>> >absolutely stable with your modification.
>> >
>> >But it's more difficult in the Yaesu amplifier, no space in the small
>> >tube compartement...
>> >
>> **  True, but it is still do-able.
>> 
>> >Please have a look at this and tell me what you think, thanks in
>> >advance!    www.qsl.net/ik7wpg
>> >
>> **  I think I saw some antennas, some radios and an operator.  The word 
>> 'homebuilt' was not found.
>> 
>> >You have to click to ''homebuilt'' and on.
>> ...  .... ....
>> 
>> -  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
>> www.vcnet.com/measures.  
>> end
>> 
>> 
>


-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
end


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