EL34LS Tube bias current

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xcpointx
Junior tube assistant
Posts: 1
(2/4/04 6:17 am)
  EL34LS Tube bias current
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 Hi

Ive got a matched quad of EL34LS's tubes from Groovetubes who state that these are rated at 30W and not the standard 25W that typically power Marshall amps.

What should I bias these too?

Any help or advice would be appreicated!

Thanks
Brandon

Edited by: xcpointx at: 2/4/04 6:17 am
 
GroundhogKen
Forum Moderator
Posts: 2239
(2/4/04 8:01 am)
  Re: EL34LS Tube bias current
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 Those are JJ E34L. You can try biasing then to 21 watts (70% of 30 watts).

That would be 46mA if your plate voltage is 450v. Watch for orange plates.

If they sound good at a cooler setting, leave them there and the they will last longer.

Ken
 
 
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