[Amps] sb-220 on 17 meters

[R.Measures]

>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

**  Is the SB-220's 20m tuned input modified?  Normally, the 17m input 
SWR is over 2 to 1 using the 20m switch position.

>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 at 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
>>>
>>>
>>>
>>>_______________________________________________
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>>>http://lists.contesting.com/mailman/listinfo/amps
>>>
>>
>
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