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FDP Forum / Amp Mods, Repairs, and Projects / Removing a CVR chassis?

Deacon Blues

wax on...

wax off...
May 17th, 2017 09:17 AM   Edit   Profile   Print Topic   Search Topic

I've run into an unusual problem. Removing a chassis from a Fender Custom Vibrolux Reverb amp. I've worked on Vibroverbs (basically the same amp) and never experienced a problem removing the chassis. I've ran into some that were difficult, but never one that I've not been able to figure out how to remove in some way. However this particular amp has me banging my head against the wall.
Chassis straps removed, screws along the rear lip of chassis removed and there appears to be no other attachments to the cabinet. The chassis will move maybe an 1/8" either forward or backward, but that's it. I even removed the baffle, but no joy.

The only thing I can think of is that the chassis may possibly be binding on some tolex glued to the inside of the cabinet.Though, I can't see anything that would indicate such binding. I've ran into this before with vintage Fenders and some of the newer amps. But, I've always managed to remove the chassis with some creative wiggling, juggling of the chassis.

Any help for removing the CVR chassis would be appreciated.

(This message was last edited by Deacon Blues at 08:44 PM, May 17th, 2017)

twangdoodles

michigan usa

May 18th, 2017 04:22 AM   Edit   Profile   Print Topic   Search Topic

Do those have sheet metal attached to the top of the cab like older amps? Maybe it's catching on that if so...

Deacon Blues

wax on...

wax off...
May 18th, 2017 07:12 AM   Edit   Profile   Print Topic   Search Topic

Could be, twangdoodles. I can't move it enough to tell, though. I've ran into to some difficult to remove chassis, but nothing like this one.

Stratmanx
Contributing Member
**********
*******

Memphis, TN

May 18th, 2017 07:29 AM   Edit   Profile   Print Topic   Search Topic

A putty knife between the cab and the chassis is the way to go.

The older Fender amps were notorious for this, the chassis would hang up on the metal shield plate in the cab would bind when removing the chassis.

A putty knife slipped into the crack and worked around when removing the chassis makes it smooth work.


Deacon Blues

wax on...

wax off...
May 18th, 2017 08:36 AM   Edit   Profile   Print Topic   Search Topic

Don't know why I hadn't already thought of that,Stratmanx. Thanks! I'll give it a try.

rfrakes331K
Contributing Member
*******

IL USA

RonHalen Jokingly He Says
May 18th, 2017 09:24 AM   Edit   Profile   Print Topic   Search Topic

I'm with twangdoodles. Try a wall mudding knife. It is wide and should cover some of the screen or Tolex.. How about the wood sticks that hold the back on? Are they too high?

Is a Vibrolux, Vibroverb, Super Reverb really the same? What makes the VR sound different? The 2X10's? Hard to get that sound and tone at less than ear splitting decibels.....

(This message was last edited by rfrakes331K at 11:26 AM, May 18th, 2017)

Deacon Blues

wax on...

wax off...
May 18th, 2017 01:55 PM   Edit   Profile   Print Topic   Search Topic

"How about the wood sticks that hold the back on? Are they too high?"

They (the wooden pads) do appear to be part of the problem, actually.

The original amps(Vibrolux, Vibroverb, Super Reverb) were really not all that similar.
The amp I'm working on is from the 1990's. During that time frame they built a Vibroverb in brown tolex in a 2x10 configuration that was basically the same as the Custom Vibrolux Reverb of that era. There were internal tweaks that made the amps behave differently.

(This message was last edited by Deacon Blues at 03:58 PM, May 18th, 2017)

Liquid Smoke

USA

Jun 3rd, 2017 10:22 PM   Edit   Profile   Print Topic   Search Topic

I think Twangdoodle is right....I have a '95 CVR that I've had apart a few times. The first time I took out the chassis I had the same problem. The shielding is a thin foil that is just stuck to the cabinet with adhesive and it was peeling up. In my case the chassis was hung up on the shielding until I worked it loose. I don't remember exactly what I did but a thin blade and persistence will probably get it out. Good Luck!

FDP Forum / Amp Mods, Repairs, and Projects / Removing a CVR chassis?




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