"tinkling" sound in 12AX7 (I think)

SinnerBoy61 · May 10th, 2005, 08:37 PM

What's this mean?? It might be coming from a 6L6, but hard to tell...

emisilly · May 11th, 2005, 12:44 PM

The tinckling is the filaments in the tube rattling a bit. The tube is shot. The easiest way to tell is to tap the tube gently with the end of a pencil or pen....if it rattles you need to swap out the tube.

SinnerBoy61 · May 16th, 2005, 04:17 AM

Ok..so I turned the amp on, let it heat up, and tapped each of the pre-amp and also the power tubes..the culprit is the third 12AX7...all other tubes were quiet, but when I hit that one it came straight through the speaker..

what would cause somethin like this?

Stan Martin · May 16th, 2005, 07:33 AM

preamp tubes get microphonic or in your case,mechanical noise has reared it's head.
just replace the tube.
By the way what amp are you using?

SinnerBoy61 · May 16th, 2005, 10:36 AM

The 12AX7 that's rattling is in a (new) Fender '57 Tweed Twin-amp.

emisilly · May 16th, 2005, 03:47 PM

The tube should be covered under the Fender warranty. Bring the situation up to the shop you got it from. If they are an authorized Fender dealer they should replace the tube no problem.

SinnerBoy61 · May 17th, 2005, 05:32 PM

The amp was ordered through a catalogue..

May 10th, 2005, 08:37 PM	#1 (permalink)
SinnerBoy61 Tele-Holic Join Date: Feb 2005 Location: Johnson City, TN - Morgantown, WV Age: 21 Posts: 629 77 Photos	"tinkling" sound in 12AX7 (I think) What's this mean?? It might be coming from a 6L6, but hard to tell...

May 11th, 2005, 12:44 PM	#2 (permalink)
emisilly Tele-Meister Join Date: Jun 2004 Location: Virginia Beach Age: 40 Posts: 485	Easy fix...replace the tube The tinckling is the filaments in the tube rattling a bit. The tube is shot. The easiest way to tell is to tap the tube gently with the end of a pencil or pen....if it rattles you need to swap out the tube.

May 16th, 2005, 07:33 AM	#4 (permalink)
Stan Martin Tele-Holic Join Date: Mar 2003 Location: Pepperell Posts: 818	no big deal preamp tubes get microphonic or in your case,mechanical noise has reared it's head. just replace the tube. By the way what amp are you using?

May 16th, 2005, 04:17 AM	#3 (permalink)
SinnerBoy61 Tele-Holic Join Date: Feb 2005 Location: Johnson City, TN - Morgantown, WV Age: 21 Posts: 629 77 Photos	Ok..so I turned the amp on, let it heat up, and tapped each of the pre-amp and also the power tubes..the culprit is the third 12AX7...all other tubes were quiet, but when I hit that one it came straight through the speaker.. what would cause somethin like this?

May 16th, 2005, 10:36 AM	#5 (permalink)
SinnerBoy61 Tele-Holic Join Date: Feb 2005 Location: Johnson City, TN - Morgantown, WV Age: 21 Posts: 629 77 Photos	The 12AX7 that's rattling is in a (new) Fender '57 Tweed Twin-amp.

May 16th, 2005, 03:47 PM	#6 (permalink)
emisilly Tele-Meister Join Date: Jun 2004 Location: Virginia Beach Age: 40 Posts: 485	The tube should be covered under the Fender warranty. Bring the situation up to the shop you got it from. If they are an authorized Fender dealer they should replace the tube no problem.

May 17th, 2005, 05:32 PM	#7 (permalink)
SinnerBoy61 Tele-Holic Join Date: Feb 2005 Location: Johnson City, TN - Morgantown, WV Age: 21 Posts: 629 77 Photos	The amp was ordered through a catalogue..