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Old 2nd July 2004, 04:33 PM   #1
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Default my EL84 pre-amp with schematic

pleas comment on my schematic...

any problems????

should I increase the 150v?? maybe to 200v?

I want to use a regulated power supply (VR tubes) so thats why 150 was picked.

recommendations for power supply???

dunno about SS, hybrid or tube rectified..
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Old 3rd July 2004, 12:37 AM   #2
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Hi,

Quote:
pleas comment on my schematic...
Hmmmm....why so complicated?

Am I correct in assuming you're trying to make some sort of mu-follower combining a choke and FET?

Why not just use a choke as a plate load, take the signal off the plate and use a VR tube to clamp the B+?

You can use the loadlines from the 12B4A if you like, a trioded EL84 is very similar...Maybe wire it for ETM as well?
Zout would be in the 1K zone if that's what you want.


Cheers,
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Old 3rd July 2004, 01:54 AM   #3
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Default ETM?

What is ETM? and what is its advantages??


Do you think a choke loaded triode EL84 would "sound" better than a triode EL84 with a MOSFET source follower in a mu configuration??

Do I get any advantages of the mu over just a choke load??

Any PSU recommendations???
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Old 3rd July 2004, 09:59 AM   #4
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ETM?

Quote:
Do you think a choke loaded triode EL84 would "sound" better
Yes


Quote:
Do I get any advantages of the mu over just a choke load??
Not really.
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