gm70 driver tube tests - Page 11

enzoastro · 30th January 2013, 09:39 PM

I meant 6j11p, had a look around and they seem to be the same thing. They are listed as an ef180 type and to me look very like a higher dissipation (4.9w) 6j9p, with higher heater current. The anodes look just like 6j9p-e's ie tanks! If thats the case they should be well worth looking at!

Enzo

Bas Horneman · 30th January 2013, 09:53 PM

Indeed they are built like a tank. I've seen them listed as E280F equivalent also.

Verstuurd van mijn GT-N7000 met Tapatalk

Unison845 · 9th May 2013, 05:54 AM

I did try C3G triode as input/driver tube (gain about 42) to the interstage xformer but I did not like the sound, compressed, loss of dynamic, still not bad sounding for SE amp. With C3G (triode) as input and 6B4G as driver/interstage the sound is more powerful, more dynamic, the sound is satisfying.

30th January 2013, 09:53 PM	#102
Bas Horneman diyAudio Moderator Emeritus Join Date: Apr 2002 Location: The Netherlands Blog Entries: 18	Indeed they are built like a tank. I've seen them listed as E280F equivalent also. Verstuurd van mijn GT-N7000 met Tapatalk __________________ Boatanchor amps forum My "adventures" in audio

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30th January 2013, 09:39 PM	#101
enzoastro diyAudio Member Join Date: Oct 2010 Location: se england	I meant 6j11p, had a look around and they seem to be the same thing. They are listed as an ef180 type and to me look very like a higher dissipation (4.9w) 6j9p, with higher heater current. The anodes look just like 6j9p-e's ie tanks! If thats the case they should be well worth looking at! Enzo