a tube question

teletard · December 25th, 2007, 11:50 PM

i have some nice old 6sj7 tubes in an old amp. are these swapable 12 a preamp tubes?

skeksis · December 26th, 2007, 12:06 AM

I'm 99% certain the answer is NO, not at least without some major remodeling of the amp...

6sj7 is a pentode and I think octal socket

12ax7 etc are dual - triodes with 9 pin miniature sockets

teletard · December 26th, 2007, 12:11 AM

thanks skeksis i was hopiing that i had some nice amazing 50 year old tubes that would give me a different type of preamp sound in another amp. i guess i should have pulled them and given them a visual inspection as well.

December 25th, 2007, 11:50 PM	#1 (permalink)
teletard Tele-Meister Join Date: May 2007 Location: hollywood california Age: 34 Posts: 244 11 Photos	a tube question i have some nice old 6sj7 tubes in an old amp. are these swapable 12 a preamp tubes?

December 26th, 2007, 12:06 AM	#2 (permalink)
skeksis Tele-Meister Join Date: Dec 2007 Location: phoenix Age: 30 Posts: 205	I'm 99% certain the answer is NO, not at least without some major remodeling of the amp... 6sj7 is a pentode and I think octal socket 12ax7 etc are dual - triodes with 9 pin miniature sockets __________________ '86 mij '62 Custom Tele ----> '08 Marsh 5F4 Super kit or 60's Silvertone guitars (Harmony-made) ----> '66 Princeton Reverb http://www.myspace.com/jswattsmusic

December 26th, 2007, 12:11 AM	#3 (permalink)
teletard Tele-Meister Join Date: May 2007 Location: hollywood california Age: 34 Posts: 244 11 Photos	thanks skeksis i was hopiing that i had some nice amazing 50 year old tubes that would give me a different type of preamp sound in another amp. i guess i should have pulled them and given them a visual inspection as well.