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In the Forum: Melquiades Amplifier
In the Thread: To drive the 6C33C...

Post Subject: Real worldPosted by N-set on: 11/10/2010

Paul, 100% agreed on the real world test vs all other mental exercises!!!
Not sure on what do you mean by the "follower"?
Yes, I need only 2 stages, perhaps TVC at the input. I'll even have a bit too much gain, if I'm correct.
Romy style bias on 6E5P and PS: LCRC with 10000uF, decoupled somehow (Arcotronics caps, Obligatto...)
The design is actually elastic: if DC sounds crap, one can insert an
interstage tranny and decouple the supplies, moving to fix bias on the output.
If it all sound crap, will throw it out of the window and forget.
The heart is the loading choke for EL34. I don't know actually how to much voltage swing
in reality the headphones will need, so I assumed the worst case scenario (perhaps stupidly):
amp max=700V @20Hz. I also want to open a gap to linearize the core and accomodate the eventual imbalance.
This results in a mastodont choke, but I do have left huge amo cores after my 304tl wet dreams.
Now, how to make it pass HF is another story. I think of 4 sections (2 per coil), layered. The sections
will be quite compact, but communicate through the big core---electrostatic shield at the core pehaps? I did have +/- ok
results with big, sectioned and layered chokes---one of a size of newborn's head gave me 200kHz with 801A.
Choke is not a tranny, it's easier to make.

Cheers,
n-set

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