tubes ?

gator19482005 · June 29th, 2008, 08:44 PM

i bought a fender concert amp. it has russian tube in it , along with a groove tube and a fender tube. i have brand new JJ's here. I took it to a guitar store and they tested the old tube and said they were fine. but when should i change the old tubes out for my new ones?

Wardpike · June 29th, 2008, 10:57 PM

When they start pinging and ringing, indications of their going microphonic...
That's one good indicator.

gator19482005 · June 30th, 2008, 03:07 AM

Quote:

Originally Posted by Wardpike

When they start pinging and ringing, indications of their going microphonic...
That's one good indicator.

What do you mean by
pinging and ringing

Wardpike · June 30th, 2008, 07:05 AM

Oh, YOU'LL know! Trust me!!

teleamp · June 30th, 2008, 07:12 AM

When the new tubes sound better than the old ones.

JimiBryant · June 30th, 2008, 07:25 AM

or just put the new tubes in there and keep the old ones as spares.

you should have your shop RE-BIAS the amp if you change tubes, it's
a minor but important detail that will help to keep your amp running
well for many years as long as you take care of it.

June 29th, 2008, 08:44 PM	#1 (permalink)
gator19482005 TDPRI Member Join Date: Jan 2005 Location: Pa Age: 60 Posts: 94	tubes ? i bought a fender concert amp. it has russian tube in it , along with a groove tube and a fender tube. i have brand new JJ's here. I took it to a guitar store and they tested the old tube and said they were fine. but when should i change the old tubes out for my new ones?

June 29th, 2008, 10:57 PM	#2 (permalink)
Wardpike Tele-Holic Join Date: Feb 2008 Location: St. John's, Newfoundland Age: 43 Posts: 587	When they start pinging and ringing, indications of their going microphonic... That's one good indicator. __________________ Proverbs 3:6 Matthew 5:44

June 30th, 2008, 07:05 AM	#4 (permalink)
Wardpike Tele-Holic Join Date: Feb 2008 Location: St. John's, Newfoundland Age: 43 Posts: 587	Oh, YOU'LL know! Trust me!! __________________ Proverbs 3:6 Matthew 5:44

June 30th, 2008, 07:25 AM	#6 (permalink)
JimiBryant Tele-Afflicted Join Date: Sep 2007 Location: Chicago Chicago that toddlin' town Age: 46 Posts: 1,543	or just put the new tubes in there and keep the old ones as spares. you should have your shop RE-BIAS the amp if you change tubes, it's a minor but important detail that will help to keep your amp running well for many years as long as you take care of it. __________________ I'm sick and tired of following my dreams, so I'm just gonna ask 'em where they're going and hook up with them later!

June 30th, 2008, 07:12 AM	#5 (permalink)
teleamp Tele-Holic Join Date: Oct 2006 Location: Central TX Age: 49 Posts: 552	When the new tubes sound better than the old ones.