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-   -   screen supply for Simple PP Pentode mode? (http://www.diyaudio.com/forums/tubelab/176834-screen-supply-simple-pp-pentode-mode.html)

chrisb 8th November 2010 01:38 AM

screen supply for Simple PP Pentode mode?
 
Clearly the question will demonstrates my ignorance of the subject, but here goes:

I'm down to the short strokes on a Simple P/P ( EL84) amp, on which I'm recycling an old pair of Scott LK48 OPT. The last DIY project these were used in was in triode mode - which sounded fine, but I'd like more power this time around. They don't have a U/L tap for screens - what would be a simple way to derive this supply? (at least I knew better than to ask "the best"? :o )

thanks

tubelab.com 8th November 2010 01:48 AM

With your 272HX the screens can be operated at full B+ provided decent tubes are used. This can be accomplished by installing jumpers in the green terminal blocks along the back of the board from the screen terminals to the B+ terminals.

chrisb 8th November 2010 06:24 AM

Quote:

Originally Posted by tubelab.com (Post 2357824)
With your 272HX the screens can be operated at full B+ provided decent tubes are used. This can be accomplished by installing jumpers in the green terminal blocks along the back of the board from the screen terminals to the B+ terminals.

thanks


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