JJ Tubes?

[Nighttrain1127]

I would not swap out 6l6's for kt88's there is a voltage situation there if IIRC I would check with someone that knows tube stuff or call peavey directly and ask them it this will cause damage or not.

 

[A9X]

will Kt88 fit inside a Alphabass? im under the impreesion that they have the same base as a 6L6GC

They do, but they're not the same tube by a long way and won't work as well without cct mods as a decent 6L6 will.
Could potentially cause damage to the amp too.

 

[unclejam]

ok i will stick with the 6l6's sounds like to much trouble for the benefits

 

[Psycho Bass Guy]

Quit getting so hung up on replacing the tubes! Peavey shipped that amp with Sylvania 6L6GC's and RCA 12AX7's and12AT7's. IF you get it and IF the tubes need replacement, cross that bridge when you come to it.

 

[jokerjkny]

JJ's are pretty awful IME. in the guitar world, alot of boutique guys tend to shun them for their quick burn out.

a much better alternative these days are TAD's, which can be easily had at most online tube retailers. but honestly, i like to stick w/ sovteks. they do the job and have lasted pretty long for my gigging needs.

 

[jokerjkny]

Y'know, after measuring a huge number of tubes over the years, and conducting a ton of sighted, unsighted and ABX tests, no one has consistently picked which tube is which in comparisons. I build guitar and harp amps using tubes as well as hifi amps, and find similar results with all types. Geetarists tell me about all the tube differences, but again, no one has ever picked the difference between two in-spec tubes of the same type in the same cct. Power tubes are even less likely, once you wrap 20dB+ of negative feedback around them.

FTR, my own personal testing often inolves the use of the highest resolution listening rig I've ever heard; SS, tube and hybrid drivers and STAX electrostatic headphones.

+1

IME, i only bought NOS tubes, cause they tended to last 3-5x longer than any modern chinese made tube. and over time, i actually saved more money going w/ NOS.

 

[One Drop]

JJ's are pretty awful IME. in the guitar world, alot of boutique guys tend to shun them for their quick burn out.

a much better alternative these days are TAD's, which can be easily had at most online tube retailers. but honestly, i like to stick w/ sovteks. they do the job and have lasted pretty long for my gigging needs.

That's the first time I've heard anyone complain about the quality of JJ tubes in bass amps. My tech swears by them, and he's get it in the neck if he put lousy tubes in all the amps he works on.

The TAD tubes are getting a great reputation, shows how much better some Chinese tubes have become recently.

 

[sineas]

my JJ bass preamp

 

[Handyman]

That's the first time I've heard anyone complain about the quality of JJ tubes in bass amps. My tech swears by them, and he's get it in the neck if he put lousy tubes in all the amps he works on.

The TAD tubes are getting a great reputation, shows how much better some Chinese tubes have become recently.

I'll second that. I've never once heard anyone complain about the quality of JJ tubes. Their sound may or may not be someone's cup of tea, but they're well made and pretty well tested. Hell, their new 6V6 is the first new production tube in decades that can survive some of the old Fender amps.

 

[jokerjkny]

they had a nice following a few years ago, but i personally can attest to their current craptastic-ness.

 

[Fealach]

Not nuts about them. Had a new KT88 bad out of the box, though to be fair the ones that survived have lasted OK; the worst problem there is that the retailer blamed me and wouldn't replace or refund. Other than that the 6L6s seem to sound a bit shrill and less deep than other quality brands, and I get better tone from old US tubes and less noise from other modern tubes. Of course all that is just based on my own ears.

I do like them for guitar,though.