[Amps] cathode to ground in tetrode amp

[R.Measures]

On Jan 30, 2006, at 9:44 AM, Gary Schafer wrote:

> Don't believe everything you see on the internet.
>

Amen, Gary.
  Tim McVeigh bombed the Murrow Bldg. because of false info he read on a 
Web site.

> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: amps-bounces at contesting.com 
>> [mailto:amps-bounces at contesting.com] On
>> Behalf Of Partain, Chuck
>> Sent: Monday, January 30, 2006 11:14 AM
>> To: Bill Turner; amps at contesting.com
>> Subject: Re: [Amps] cathode to ground in tetrode amp
>>
>> ya
>>
>>
>>
>>  <http://www.angelfire.com/nb/ni4l/gu84b.html>
>> http://www.angelfire.com/nb/ni4l/gu84b.html
>>
>> Look down at the ONE tube schematic.
>>
>> This is the only one I have seen for HF so far that's not too 
>> convoluted.
>>
>>
>>
>>
>>
>>  -----Original Message-----
>> From: Bill Turner [mailto:dezrat1242 at ispwest.com]
>> Sent: Monday, January 30, 2006 11:11 AM
>> To: Partain, Chuck; amps at contesting.com
>> Subject: Re: [Amps] cathode to ground in tetrode amp
>>
>>
>> ORIGINAL MESSAGE:
>>
>> At 07:14 AM 1/30/2006, Partain, Chuck wrote:
>>
>>
>>
>> OK, getting into this more and more every day and learning. Looking at
>> some designs on this GU-84b
>> amp, I see a lot if not most of the cathodes have resistance, some a
>> lot(30k) some little (.7) to ground.
>> The screen grid and control grids are not grounded and have 
>> respectively
>> ~350 and -150v on them.
>>
>> Why wouldn't it just essentially go to ground? what does the R do in
>> series?
>>
>> thanks as always.
>>
>> KA1MWP
>>
>>
>>
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> Is there a schematic we could look at?
>>
>> 73, Bill W6WRT
>>
>>
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>
>
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>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org