Fender Pro Jr tube noise fix?

lamp · 19th March 2006, 01:39 AM

Can someone give me a link to the thread with the Fender Pro Jr tube noise mod/fix? Searched for hours but can't find it. Thanks.

lamp · 19th March 2006, 10:15 PM

Kiwiburger · 19th March 2006, 10:45 PM

The current administration refuses to accept that Fender amps are noisy. You didn't hear this here ...

Teddy Gee · 20th March 2006, 12:33 AM

LOL!

I have a great tech here who just did complete overhauls and NOS retube of my Pro Jr. and my Trace Elliott Velocette.

One of the things I wanted was to see if he could reduce the ENORMOUS noise level of the Fender (the all Class-A Elliott on the other hand is dead quiet!).

I don't want to tell you what he said in detail, but suffice to say that he told me he would have to totally rebuild the Pro Jr. and would love to do it if I could give hinm a month. I opted to keep it as is and continue to use gates. I am not a Fender detractor and like my Pro Jr, but even at idle with volume off..............it is loud!, and I do not know of a fix.

Stephen

Eric Dahlberg · 20th March 2006, 01:13 AM

A 12AX7EH in the first position helps a tad. The Pro Jr. has an extremely simple layout, though, that wouldn't take much to rebuild.

Eric Dahlberg · 20th March 2006, 01:21 AM

Quote:

Originally Posted by Teddy Gee

One of the things I wanted was to see if he could reduce the ENORMOUS noise level of the Fender (the all Class-A Elliott on the other hand is dead quiet!).

How's the cabinet vibration on that Velocette? How do you compare its sound against the Pro Jr.'s?

vernier · 20th March 2006, 03:50 AM

I had two Pro Jr's, got rid of 'em cuz of the rush at idle.

lamp · 20th March 2006, 04:52 AM

Thanks for the replys. What im talking about is not really the noise and hum. Sorry I should have made that more clear. Its a resonance type sound from one ore more of the tubes. Sometimes steady state, sometimes sympathetic to a certain note being played. Its a known issue with the Pro Jr and the fix has something to do with taking the tubes out and making a gasket or something like that. I think I read it here on Gearslutz awhile back. It was a pretty simple fix. I can stop the sound if I hold something against the tube. ???????

Marjan · 20th March 2006, 07:35 AM

Look in the Fender forum: http://www.fenderforum.com/
You might get what you need... If not in the archives, register and ask those guys. There's plenty of well informed amp freaks over there.

Quote:

Originally Posted by Kiwiburger

The current administration refuses to accept that Fender amps are noisy. You didn't hear this here ...

I'm a big Fender fan, and I think the Vibrolux completelly blows that statement away, to name just one.
Its a really noisy amp... perhaps the noisiest I ever hear.
By the way, I actually own one and sent it to a technichian a while back for him to see what he could do about that...
He said he would only be able to decrease the noise by decreasing the loudness, which is kind of cheating.
I decided to go for it though, and I'm happier now... less noise and still pretty damn loud to my ears

with no loss of the sound's charachter...

Curve Dominant · 20th March 2006, 07:59 AM

I'm bumping this thread because I have new preamp tubes on order for my Fender Pro Junior.

We've recorded some positively bitchin' sounds with this amp, but it is indeed noisy as all hell, with some chaotic ringing in high frequencies which are sometimes cool sounding, but not always desireable.

I suspect the stock Groove Tubes in the preamp stage posess microphonics which may be the culprit here, so I ordered new EH tubes from the Tube Store. Hopefully this will be the fix. If not, there are plate electronics issues at hand which may warrant ... a new amp? Hopefully not, but I'll post an update here as soon as I get the new tubes installed and tested.

Marjan · 20th March 2006, 08:06 AM

Hmm... I doubt it's to do with microphonics...
I think if that was the case 'lamp' wouldn't be able to stop the ringing by holding something against the tube as he mentioned...

Eric Dahlberg · 20th March 2006, 05:50 PM

Quote:

Originally Posted by lamp

What im talking about is not really the noise and hum. Sorry I should have made that more clear. Its a resonance type sound from one ore more of the tubes. Sometimes steady state, sometimes sympathetic to a certain note being played.

That's the stupid tube retainer they use. I took mine off & have never had trouble with the power tubes getting loose, even though I regularly take the amp out to gigs & sessions.

Teddy Gee · 20th March 2006, 06:32 PM

Quote:

Originally Posted by Eric Dahlberg

How's the cabinet vibration on that Velocette? How do you compare its sound against the Pro Jr.'s?

Eric,

I do not get any cabinet vibration from the Velocette. Compared to the Fender it is pretty aggressive in the lower mid range (I rarely if ever engage the "bright" switch) and would not be my choice for clean sounds. It is pretty hard to get anything out of it that is not at least a bit distorted (in a good way). The NOS tubes help mellow it a bit but it is a pretty aggressive little amp.

I think what my guy was saying in regard to rebuilding the Fender had more to do with starting over from scratch than rebuidling the existing. He did not think much of the design and suggested starting over.

Stephen

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19th March 2006, 01:39 AM	#1
lamp Gear nut Join Date: May 2003 Location: usa Posts: 138	Fender Pro Jr tube noise fix? Can someone give me a link to the thread with the Fender Pro Jr tube noise mod/fix? Searched for hours but can't find it. Thanks.

19th March 2006, 10:15 PM	#2
lamp Gear nut Join Date: May 2003 Location: usa Posts: 138	Bump

20th March 2006, 01:13 AM	#5
Eric Dahlberg Gear nut Join Date: Mar 2006 Posts: 92	A 12AX7EH in the first position helps a tad. The Pro Jr. has an extremely simple layout, though, that wouldn't take much to rebuild. __________________ Uncle E JRR Shop PH: 949-553-1022 FX: 949-263-1818 http://www.jrrshop.com http://www.justroots.com http://www.nossound.com

20th March 2006, 07:59 AM	#10
Curve Dominant Lives for gear Join Date: Oct 2002 Location: PHITOWN Posts: 1,921	I'm bumping this thread because I have new preamp tubes on order for my Fender Pro Junior. We've recorded some positively bitchin' sounds with this amp, but it is indeed noisy as all hell, with some chaotic ringing in high frequencies which are sometimes cool sounding, but not always desireable. I suspect the stock Groove Tubes in the preamp stage posess microphonics which may be the culprit here, so I ordered new EH tubes from the Tube Store. Hopefully this will be the fix. If not, there are plate electronics issues at hand which may warrant ... a new amp? Hopefully not, but I'll post an update here as soon as I get the new tubes installed and tested. __________________ http://www.curvedominant.com http://www.myspace.com/studiocurvedominant

19th March 2006, 10:45 PM	#3
Kiwiburger Lives for gear Join Date: Feb 2006 Posts: 3,671	The current administration refuses to accept that Fender amps are noisy. You didn't hear this here ...

20th March 2006, 12:33 AM	#4
Teddy Gee Gear addict Join Date: Aug 2004 Location: Las Vegas Posts: 311	LOL! I have a great tech here who just did complete overhauls and NOS retube of my Pro Jr. and my Trace Elliott Velocette. One of the things I wanted was to see if he could reduce the ENORMOUS noise level of the Fender (the all Class-A Elliott on the other hand is dead quiet!). I don't want to tell you what he said in detail, but suffice to say that he told me he would have to totally rebuild the Pro Jr. and would love to do it if I could give hinm a month. I opted to keep it as is and continue to use gates. I am not a Fender detractor and like my Pro Jr, but even at idle with volume off..............it is loud!, and I do not know of a fix. Stephen

20th March 2006, 03:50 AM	#7
vernier Lives for gear Join Date: Mar 2006 Posts: 3,624	I had two Pro Jr's, got rid of 'em cuz of the rush at idle.

20th March 2006, 04:52 AM	#8
lamp Gear nut Join Date: May 2003 Location: usa Posts: 138	Thanks for the replys. What im talking about is not really the noise and hum. Sorry I should have made that more clear. Its a resonance type sound from one ore more of the tubes. Sometimes steady state, sometimes sympathetic to a certain note being played. Its a known issue with the Pro Jr and the fix has something to do with taking the tubes out and making a gasket or something like that. I think I read it here on Gearslutz awhile back. It was a pretty simple fix. I can stop the sound if I hold something against the tube. ???????

20th March 2006, 08:06 AM	#11
Marjan Gear addict Join Date: Apr 2005 Location: Porto, Portugal Posts: 499	Hmm... I doubt it's to do with microphonics... I think if that was the case 'lamp' wouldn't be able to stop the ringing by holding something against the tube as he mentioned... __________________ Zé Nuno Audio Pleiad http://www.tibet.org/images/door/tibet-olympics.jpg

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