I bought a brand new 6505 last year and after two weeks it started making a low static like sound when the amp was turned on but you werent playing. After an hour on the phone with sweetwater techs i went and bought 3 sovteks and replaced the 3 jj's my 6505 had in it from the factory,problem solved. The amp techs said sometimes that just "happens"
So now in my 5150ii i bought all jjecc83's for the preamp and what do you know couple weeks later this amp starts doing the same thing. So i take some old stock rubys i have laying around and a couple russian sovteks and viola! problem solved.
Is quality control THIS bad at JJ? Of course tubes are never returnable even though the techs say sometimes you just get a "bad" tube. I am so pissed i just blew almost 80 bucks on tubes and they are garbage,NEVER AGAIN JJ!!
And i also posted a thread a little while back saying my 5150ii sounded very odd,and i thought it was the speakers,well now with the ruby/sovteks it sounds fine. Now that i have those garbage jj's out.