Would you be able to source "iron" on the lam stack used for Dyna A-410s with a 10 K CT primary, no UL taps, and 20% CFB tertiary windings?

Eli D.

 Re: ? for MSL about PP "iron" for 12 W. pentodes. - mqracing 18:32:12 05/14/04 (1)
 Re: ? for MSL about PP "iron" for 12 W. pentodes. - Eli Duttman 00:46:35 05/15/04 (0)

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 Re: ? for MSL about PP "iron" for 12 W. pentodes. - mqracing 18:32:12 05/14/04 (1)
 Re: ? for MSL about PP "iron" for 12 W. pentodes. - Eli Duttman 00:46:35 05/15/04 (0)

wow... I never even heard of a EL821...boards only been up a few days and I think this is the second tube type I mentioned that I have never seen....

re: custom output transformer... with our own in-house R&D and new product development I'm not accepting any custom output transformer design work or development at this time...

the only "custom" work I am doing at this time is for plate chokes and filter chokes.

sorry I could not offer more assistance,

Mike

What I've got in mind is PP "finals" employing Dennis Boyle's combination bias. The smallish unbypassed cathode resistor raises the O/P impedance. That's why I'm thinking in terms of a 10 KOhm CT primary.

BTW, a KEY virtue of the EL821 is price. A matched quad of NOS Mullard EL821s is about $100.

Eli D.