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Old 13th April 2011, 02:19 PM   #1
alexg is offline alexg  Philippines
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Default 0d3 for el84 screen regulator

I am planning on building an el84 (pentode) driven 300B amp.

Can I use a single 0D3 regulator for both of the el84 screens?

Thanks.
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Old 13th April 2011, 04:19 PM   #2
DF96 is offline DF96  England
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I don't see why not. You would just have to check that the 0D3 current is not too high while the EL84s are warming up.
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Old 13th April 2011, 05:33 PM   #3
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Quote:
You would just have to check that the 0D3 current is not too high while the EL84s are warming up.
I've seen quite a few posts praising, to the sky, the combination of a constant current source (CCS) and a gas discharge regulator tube. If you set the CCS to just below the max. current the 0D3 allows, things will always be in order, provided the screen grids do not draw so much current that the 0D3 does get its necessary minimum. Naturally, the B+ rail has to be "tall" enough to operate the CCS and cause the 0D3 to "strike".
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Last edited by Eli Duttman; 13th April 2011 at 05:35 PM. Reason: grammar
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Old 15th April 2011, 05:16 AM   #4
alexg is offline alexg  Philippines
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Thanks guys, I will start with an el84 (pentode wired) driving a 2a3 for now and see what happens, then later get the 300B.

Thanks.
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Old 15th April 2011, 10:01 AM   #5
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Default EL84 Operating Point

What operating point will you be using on the EL84? I'm planning on using EL84's as drivers in a project and want to gather more info.

Thanks . . . Charlie
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