[Amps] Sb-220 grid Chokes

[R.Measures]

**  More grid-gnd bypass C is needed with a fusing resistor in order to 
protect it from RF on 10m - due to the 5pF anode-grid C.  Thus, the 
original 3 x 200pF or so caps need to be padded with an additional 1000 
or so pF to bring the grand total to over 1500pF.  

>All,
>
>What is the recommended grid-gnd circuit?? The original sb-220 had an LC 
>network; it seems to be a common recommendation to replace the coil with 
>a 33 OHM resister. Are the caps changed as well??
>
>Thanks,
>Dan
>
>R.Measures wrote:
>
>>**  Disc ceramics have less less L than silver-micas.  Also, the grid-gnd 
>>circuit is not part of the tuned input circuit, so the stability of a 
>>silver mica is not needed.
>>
>>  
>>
>>>Need some Elmering.
>>>
>>>Can anyone explain why the Harbach Suppressor kits use Ceramic Disc instead 
>>>of Dipped silver micas  for Rf choke replacements?
>>>
>>>
>>>Thanks in Advanced
>>>Chris
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>>>    
>>>
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>>  
>>
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