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previous: Matt Thanks Greg. In his example, the p... -- 1136580663 View Thread

Re: EF86 - Reloaded

1/6/2006 5:29 PM
John MartinRe: EF86 - Reloaded
I use 100v as a starting point. The audiophile "ideals" don't always exactly fit guitar amp design, but I found most of the common small signal pentodes work well at lower plate voltages. I think I miss stated the screen voltage thing. I meant that they should be 30% - 40% less than the plate voltage. So with 100v on the plate it would be 60v - 70v on the screen. Its a lot more difficult to hit ideal values right on the nose like it is with triodes. Some tweaking from the "book" values is always in order for pentodes.  
 
 
 
I hadn't heard that production on the EF86 had ceased. I think that the 6AU6 and 6SJ7 are still made in Russia as I have bought them in recent years.

 
Replies:
BK I tried an EF86 boosted plexi style... -- 1/6/2006 6:09 PM
Matt Thanks for clarifying John. That m... -- 1/6/2006 6:14 PM