[Amps] sb-220 on 17 meters

R.Measures r at somis.org
Sun Feb 22 07:21:57 EST 2004



>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
>
>
>
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