Home MagneQuest/Peerless Forum

Welcome! Need support, you got it. Or share your ideas and experiences.

Re: ? for MSL about PP "iron" for 12 W. pentodes.

EL821 = 6CH6 is a 12 W. pentode. The EL821 will work with EL84 "iron", but Ra is higher. The EL821 is more sensitive than the EL84 and max. Ua is 275 V.

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.


This post is made possible by the generous support of people like you and our sponsors:
  Parts Connexion  


Follow Ups Full Thread
Follow Ups
  • Re: ? for MSL about PP "iron" for 12 W. pentodes. - Eli Duttman 00:46:35 05/15/04 (0)


You can not post to an archived thread.