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Topic: Adding reverb/trem to both channels of a Twin Reissue |
Howard Montgomery
From:
Topeka, KS US
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Posted 6 Apr 2013 11:55 am |
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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/misc_mod/both_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/index.html?recid=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_reverb_@20manual.pdf
New layout with changes.
Last edited by Howard Montgomery on 22 Sep 2013 5:45 pm; edited 1 time in total |
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Don Griffiths
From:
Steelville, MO
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Posted 22 Sep 2013 2:52 pm
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Thanks Howard, it has always seemed illogical to me that one channel rarely if ever gets used on the Twin. I've been thinking of messing with it a little. I saw where you can run a patch cable from the clean channel to the vibrato channel routing the signal through both channels but don't know why I need it any louder?
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Shobud Pro1,BMI U12, Santa Cruz F, PRS Standard, Fender Twin Reverb, ‘53 000-28 |
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Matt Henschel
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Posted 22 Sep 2013 6:04 pm channel 1/twin
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| A fun thing to do, if you have two outputs on your volume pedal, is to hook one up to each channel. The two channels are out of phase, and you can get some neat sounds, especially when one is tremelo/reverb'd and the other isn't. I wouldn't modify it myself. The added 'subtraction' you get from running two channels out of phase, especially with one running 1.5 12ax7's with reverb and tremelo added is just too cool-- especially with a steel and a 15" speaker. |
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Tim Marcus
From:
San Francisco, CA
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Posted 22 Sep 2013 6:53 pm
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I usually move the two mix resistors so that the two channels are in phase and so they both hit that third gain stage (where the reverb mixes back in)
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Milkmansound.com |
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Ken Fox
From:
Nashville GA USA
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Posted 23 Sep 2013 5:50 am
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Some old notes I had on hand:
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