Fender Delux Reverb AB763

TGRANT · 9th January 2007, 04:55 AM

I am repairing an original Fender Delux Reverb AB763. (I bought it used in 1979 and it worked fine until two years ago). I put it away and forgot about it until a few weeks ago. One of the transformers ( I’m pretty sure it’s the main power transformer) has a tube socket in it that appears to fit the GZ34 rectifier tube. I don’t recall there ever being a tube there when the amp worked. Now that the amp doesn’t work, I am wondering if that tube socket means anything. Is there anyone with experience working on this amp? If so, what is the socket on the transformer for, if anything?

Also, the amp is dead in the water. My best guess is that the GZ34 is dead since nothing at all happens when the amp is plugged in and turned on except the filaments on the other tubes light up, so at least the heater circuit works. I tested the filament of the GZ34 and get continuity, but can’t test the tube more than that. Any easy way to test it? I haven’t found anyone nearby with a tube tester.

Zibi · 9th January 2007, 10:47 AM

http://aga.rru.com/Events/MM-DRRI-rebuild/

9th January 2007, 04:55 AM	#1
TGRANT diyAudio Member Join Date: Sep 2006	Fender Delux Reverb AB763 I am repairing an original Fender Delux Reverb AB763. (I bought it used in 1979 and it worked fine until two years ago). I put it away and forgot about it until a few weeks ago. One of the transformers ( I’m pretty sure it’s the main power transformer) has a tube socket in it that appears to fit the GZ34 rectifier tube. I don’t recall there ever being a tube there when the amp worked. Now that the amp doesn’t work, I am wondering if that tube socket means anything. Is there anyone with experience working on this amp? If so, what is the socket on the transformer for, if anything? Also, the amp is dead in the water. My best guess is that the GZ34 is dead since nothing at all happens when the amp is plugged in and turned on except the filaments on the other tubes light up, so at least the heater circuit works. I tested the filament of the GZ34 and get continuity, but can’t test the tube more than that. Any easy way to test it? I haven’t found anyone nearby with a tube tester.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fender 6G15 Reverb Question	bluezrider	Parts	1	21st February 2009 07:00 AM
Fender twin Reverb	theriffa	Instruments and Amps	1	11th May 2008 02:15 PM
Fender super twin reverb	jazz	Instruments and Amps	1	4th September 2007 08:30 PM
Can you run a Fender Twin Reverb with only two 6L6's?	garrett_92exp	Tubes / Valves	5	3rd February 2006 11:34 AM
Good old Fender Twin Reverb	Netlist	Tubes / Valves	9	14th January 2004 01:55 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

9th January 2007, 10:47 AM	#2
Zibi diyAudio Member Join Date: Jan 2006 Location: Bialystok	http://aga.rru.com/Events/MM-DRRI-rebuild/

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)