Adding reverb/trem to both channels of a Twin Reissue
Posted: 6 Apr 2013 11:55 am
I love Fender amps, but want the reverb/trem on both channels. I have fixed this with a couple of hand wired Fenders using the method here:
Reverb on both channels: http://www.blueguitar.org/new/schem/mis ... th_rev.gif
But, I now have a Twin Reverb Custom 15, and again, I want reverb on both channels to play both guitar and steel through each channel. There is lots of info on the Fritz mod for the DRRI, but the board layout is different on the Twin. Here is the link to the Fritz mod if you want to do this to a Deluxe Reverb Reissue.
Fritz mod: http://www.fenderforum.com/userphotos/i ... ecid=48201
So after looking at these two documents, I determined it should be pretty easy to do this to the Twin Reissue. It invloved removing all of the screws holding the main board down to remove a capacitor and solder one leg of a new cap in. Only had to lift the board, not remove it. Took only about 30 minutes or so.
While I was in there I made one more change (while I was in the neighborhood). On my amp, there is a 10A fuse on the board for the heater circuit that does not show on the schematic. Don't know if it is a new addition and schematic is old or what. I relocated it to the back panel next to the main fuse so if it needs replaced, I don't have to remove the chassis. There is already a hole drilled in the chassis, probably for the dummy polarity switch they used to put in the early reissues.
Results- great Fender reverb on both channels and better yet, I didn't electocute myself!
Link to schematic: (Also on Fender website) http://ampwares.com/schematics/65_twin_ ... manual.pdf
New layout with changes.
Reverb on both channels: http://www.blueguitar.org/new/schem/mis ... th_rev.gif
But, I now have a Twin Reverb Custom 15, and again, I want reverb on both channels to play both guitar and steel through each channel. There is lots of info on the Fritz mod for the DRRI, but the board layout is different on the Twin. Here is the link to the Fritz mod if you want to do this to a Deluxe Reverb Reissue.
Fritz mod: http://www.fenderforum.com/userphotos/i ... ecid=48201
So after looking at these two documents, I determined it should be pretty easy to do this to the Twin Reissue. It invloved removing all of the screws holding the main board down to remove a capacitor and solder one leg of a new cap in. Only had to lift the board, not remove it. Took only about 30 minutes or so.
While I was in there I made one more change (while I was in the neighborhood). On my amp, there is a 10A fuse on the board for the heater circuit that does not show on the schematic. Don't know if it is a new addition and schematic is old or what. I relocated it to the back panel next to the main fuse so if it needs replaced, I don't have to remove the chassis. There is already a hole drilled in the chassis, probably for the dummy polarity switch they used to put in the early reissues.
Results- great Fender reverb on both channels and better yet, I didn't electocute myself!
Link to schematic: (Also on Fender website) http://ampwares.com/schematics/65_twin_ ... manual.pdf
New layout with changes.
