[Heath] More SB-200 joys...

Guy Giacopuzzi gggdds at js-net.com
Sat Jan 14 09:02:55 EST 2012


See below...

On 1/13/2012 4:25 PM, Kenneth G. Gordon wrote:
> Today, I replaced the original parasitic chokes with new ones, following a design by Carl
> KM1H.
>
> After all was finished, I now have 100 more watts output than I had with the originals, even
> with well-worn Chinese tubes. 550 watts output on 80 whereas I was just making 450 watts
> output previously. Input plate and grid currents appear to be identical with what they were
> before.
>
> /Measuring the original 47 ohm resistors, I find one is now 78 ohms and the other is 210
> ohms./

How can this be?  Can you explain?
Guy,
WA6OQQ
> Other owners of SB-200s might want to do some investigation...
>
> I will report the results of further testing...
>
> Ken W7EKB
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> Heath at puck.nether.net
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