I LIKE power!, and I was asking a technical question of Ray.

Posted by Timbo in Oz (A) on February 2, 2007 at 19:03:19

In Reply to: Re: d'ya think RM drives EL84's too hard!? posted by Tre' on February 2, 2007 at 18:41:10:

AFAIK PP CCS'd EL84M's/7189 IE A1, are gonna struggle to dissipate 20 watts in pure A - continuously - as at idle, even in pentode mode*.

And, so long as I have a watt or three of A in AB1 I'll be happy.

Especially if fixed bias, were used, so I could adjust over the power tubes life.

And I might go with a CCS on each input/gain stage, even TWO single triode input tubes (6C45?), with an extra socket!

With fixed (adjustable) bias for each PP tube I think we'd be getting pdclose to SE sound, anyway!

MY spkrs are 91db/w, and an EASY 8 ohm load, I'd just like more reliability, AND a little more headroom!

I would need to upgrade the power trannie anyway - for the 'CCS'd pure diff'l opt stage' route, to be worth doing - as I don't want to LOSE power, either!

*I don't even KNOW what continuous output the OPTxers could cope with.

Warmest

Timbo in Oz
The Skyptical Mensurer and Audio Scrounger

And gladly would he learn and gladly teach - Chaucer. ;-)!

'Still not saluting.'

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

Follow Ups Full Thread

Topic - Where did the term 'tube rollling' come from? - arahl 14:07:05 02/02/07 (13)

Re: Where did the term 'tube rollling' come from? - Steve O 15:39:00 02/02/07 (12)

I thought "rolling" and "scoring" were drugs argot - andy evans 14:56:09 02/05/07 (0)

Re: Where did the term 'tube rollling' come from? - Ray Moth 16:58:53 02/02/07 (10)

Re: Where did the term 'tube rollling' come from? - Steve O 20:02:34 02/02/07 (0)

d'ya think RM drives EL84's too hard!? - Timbo in Oz 17:53:07 02/02/07 (8)

Re: d'ya think RM drives EL84's too hard!? - Ray Moth 14:40:21 02/03/07 (3)

well I currently get 20 watts @ 20 hz (.5%) and through to 20khz @( .1% thd - Timbo in Oz 17:47:50 02/05/07 (2)

Re: well I currently get 20 watts @ 20 hz (.5%) and through to 20khz @( .1% thd - Ray Moth 03:43:34 02/14/07 (1)

The values around the ip and drivers were changed - Timbo in Oz 14:47:49 02/14/07 (0)

Re: d'ya think RM drives EL84's too hard!? - Tre' 18:41:10 02/02/07 (3)

I LIKE power!, and I was asking a technical question of Ray. - Timbo in Oz 19:03:19 02/02/07 (2)

I'm not sure of the question but I have some comments - Russ57 06:14:27 02/03/07 (1)

See above under Ray Moths' post, too - Timbo in Oz 17:50:26 02/05/07 (0)

Follow Ups

I LIKE power!, and I was asking a technical question of Ray. - Timbo in Oz 19:03:19 02/02/07 (2)

I'm not sure of the question but I have some comments - Russ57 06:14:27 02/03/07 (1)

See above under Ray Moths' post, too - Timbo in Oz 17:50:26 02/05/07 (0)

You can not post to an archived thread.