[Amps] 6 mtrs:

[jeremy-ca]

The useful answer is that the 572B works very well at 6M and a SB-200 works 
very well there also if you understand amplifiers. No rocket science 
required.

Carl
KM1H


----- Original Message ----- 
From: "c.s." <carlseye at verizon.net>
To: <amps at contesting.com>
Sent: Monday, September 24, 2007 5:27 PM
Subject: [Amps] 6 mtrs:


>     I have been seeing several messages here lately relating to 6 mtr.
> conversions of SB200 type amps to 6 mtrs . using (purportedly) 572B type
> tubes.!!! This may very well be as advertised, BUT, I am Very curious as
> to HOW the tubes that are advertised as being good only to 30 mcs.
> (oop-s) 30 mhz. are being "coerced" into working at 6 mtrs.!!!!
>         I'm not the world's greatest at this stuff ( any more) , But it
> is indeed very interesting to know how all this is happening.!!! I'm
> sure there are those among us who wonder how this is being 
> accomplished.!!!!
>        If those who know are afraid to tell us ( meatheads?) it doesn't
> seem to me  that they are indeed "Hams" in the purest sense of the
> word.!!!!!  If they are NOT hams , they seemining don't belong on this
> list.!!!!!
>        I for one have many problems with the SB200's ( 572B's) even at
> 30 mcs(oops) 30 mhz!!!  The stability of an SB 200 is in my mind, at
> least questionable at 30 MHZ.!!!!!!!
>        At least that is what I've run into , and I have never (that I
> can recall) had any useful answers, Though I've asked before.!!!
>         Anybody involved got any useful answers????????????
>                  carl / kz5ca
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