[Amps] grounding grids

Herzog herzog at frontiernet.net
Wed Jul 29 15:07:37 PDT 2009


Yes, that is what I did in a circuit to protect 8122's from drive
without any plate voltage.  We came up with a circuit fast enough to
protect the grid from burning up; which removed the drive.  It also
worked to protect against overdrive.

Bill Fuqua wrote:
> Maybe to measure individual grid currents?
> That would be the only reason I can think of.
> 73
> Bill wa4lav
> 
> At 08:35 PM 7/27/2009 -0400, Herzog wrote:
>> RE: > >Hi.
>>  > >This has probable been asked before on this group,but... Is it good
>>  > >practice to physically tie the grids to ground via one 
>> connection,or via
>>  > >low value resistors and decoupling capacitors. I was going to go 
>> for VHF
>>  > >practice and go for direct grounding,but would like some comments 
>> before
>>  > >progressing this project.
>>  > >               73`s Jon
>>
>> REPLY:
>>
>> I'm curious - what would be the reason for using resistors and
>> decoupling caps?
>>
>> 73, Bill W6WRT
>> ===========================
>> Herzog proffers a reason, to be able to measure the grid current.
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
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