Something Like A 6EU7?

Troncones · 28th December 2010, 08:01 PM

I have several low power Tx's (250-0-250, 90mA). I would like to use something like the 6EU7 for the gain stage to keep the load down.

The basic requirements are 6V heater, 1ma to 4ma plate current, twin triode, max plate 100V-300V, economical (maybe Russian). SE 6BQ5 (pentode) output.

Any ideas?

Ty_Bower · 28th December 2010, 08:39 PM

The 12AX7 (ECC83) is essentially the same as the 6EU7, only with a different pinout.

Troncones · 28th December 2010, 09:00 PM

Thanks, but I need a 6V heater. The Tranny's I have don't have 12 V or 6-0-6.

Arnulf · 28th December 2010, 09:10 PM

Quote:

Originally Posted by Troncones

Thanks, but I need a 6V heater. The Tranny's I have don't have 12 V or 6-0-6.

Wire both heaters in parallel (as many/most people do).

nerdorama · 28th December 2010, 09:11 PM

Look carefully at the 12AX7 data sheet for the heater specs and wiring. You can use it with 6.3V, too.
Best,
John

Troncones · 29th December 2010, 01:02 AM

Very good. Thanks.

28th December 2010, 08:01 PM	#1
Troncones diyAudio Member Join Date: Dec 2009 Location: Orange County, California.	Something Like A 6EU7? I have several low power Tx's (250-0-250, 90mA). I would like to use something like the 6EU7 for the gain stage to keep the load down. The basic requirements are 6V heater, 1ma to 4ma plate current, twin triode, max plate 100V-300V, economical (maybe Russian). SE 6BQ5 (pentode) output. Any ideas? __________________ The Myth: A hand full of Tubes, Caps, Resistors and Iron and you have an Amp. The Reality: You have self induced Dementia. Newbie.

28th December 2010, 09:00 PM	#3
Troncones diyAudio Member Join Date: Dec 2009 Location: Orange County, California.	Thanks, but I need a 6V heater. The Tranny's I have don't have 12 V or 6-0-6. __________________ The Myth: A hand full of Tubes, Caps, Resistors and Iron and you have an Amp. The Reality: You have self induced Dementia. Newbie.

29th December 2010, 01:02 AM	#6
Troncones diyAudio Member Join Date: Dec 2009 Location: Orange County, California.	Very good. Thanks. __________________ The Myth: A hand full of Tubes, Caps, Resistors and Iron and you have an Amp. The Reality: You have self induced Dementia. Newbie.

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28th December 2010, 08:39 PM	#2
Ty_Bower diyAudio Member Join Date: Mar 2007 Location: Newark, DE	The 12AX7 (ECC83) is essentially the same as the 6EU7, only with a different pinout.

28th December 2010, 09:11 PM	#5
nerdorama diyAudio Member Join Date: Aug 2005	Look carefully at the 12AX7 data sheet for the heater specs and wiring. You can use it with 6.3V, too. Best, John