Re: [Amps] sb-220 on 17 meters

[peter <lecutis2@netscape.net>]

Thanks for the help.
So Mr. Measures asked the following question as seen below.  So I tune 
up to find the answers.  Mind you I just installed a vhf parasitic kit 
today.
I now get decent output with no extra heat or filament glow.  Tubes are 
weak so take outputs with this in mind.
Input Swr 1.0:1
Plate amp. 0.6
Grid millamp 210
output swr 1.4:1
exciter watts 84
output  775 watts

Two conclusions.  Its an intermitant problem or the parasitic kit 
altered something.

Maybe human error but I doubt it. I tried tuning it up on two different 
days.  With the same low power out on both days.
 Thanks
Peter
KC0NYG
"R. Measures" <r@somis.org> wrote:

> > I recently aquired a sb-220.  When I try to tune up the amp on 17 meters
> > using the 15 meter band switch I get only 300 watts out and both tubes
> > really are working hard.
>
> **  What is the plate/anode current reading with key-down/AØ emission on
> the CW tap?  What is the input SWR?  Tnx
>
> > I get 1kw out on 15 meters and 20 meters.  Is
> > my plate choke resonating about 18 mhz ?  Any help would be appreciated.
> > Peter
> > KC0NYG
> >
> >
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps

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