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Hoffman Amps Forum image Author Topic: 56K resistors on the two Screen     &nbs  (Read 3006 times)

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56K resistors on the two Screen     &nbs
« on: June 17, 2005, 09:52:54 pm »

  Hoffman Amplifiers
    > Tube Amp Building - Tweaks - Repairs
        > 56K resistors on the two Screen Caps ?      
 
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aerojazz
Senior tube assistant
Posts: 157
(3/5/04 12:34 pm)
  56K resistors on the two Screen Caps ?
--------------------------------------------------------------------------------
 The 56K resistors on the two Screen Caps (100 watt SuperLead) are the necessary?
Can I sub some other val?
I dont have any on hand.

Edited by: aerojazz at: 3/5/04 12:52 pm
 
GroundhogKen
Forum Moderator
Posts: 2307
(3/5/04 1:35 pm)
  Re: 56K resistors on the two Screen Caps ?
--------------------------------------------------------------------------------
 They are necessary to insure that both series cap share the total voltage--rather than one cap taking the full B+ while the other remains uncharged.

I'm sure you could get away with some plain old 1/2 watt 220K resistors while you wait for the correct parts.


Ken
 
aerojazz
Senior tube assistant
Posts: 158
(3/5/04 2:16 pm)
  Re: 56K resistors on the two Screen Caps ?
--------------------------------------------------------------------------------
 whew, relief, thanks again...

How bout two 5 watt 100K in parallel (each)?

Edited by: aerojazz at: 3/6/04 10:46 am
 
GroundhogKen
Forum Moderator
Posts: 2309
(3/6/04 10:55 am)
  Re: 56K resistors on the two Screen Caps ?
--------------------------------------------------------------------------------
 That works.

I don't think the value is critical. You could just use two 100K 5 watters -- no real need to parallel them to 50K.


Ken
 
 
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