Modding DRRI's tremolo to Princeton specs - is this possible?

Super Locrian

Member
Messages
1,507
I have a '65 DRRI, and was wondering if it is complicated to change the tremolo circuit into Princeton specs? And will doing this change the base sound of the DRRI?
 

Tubenit

Member
Messages
65
The Deluxe Reverb uses two 12AX7 triodes and tremo opto-isolator

http://el34world.com/charts/Schematics/files/fender/Fender_65_deluxe_reverb_reissue_sm.pdf

The Princeton uses one 12AX7 triode and is bias vary.

http://el34world.com/charts/Schematics/files/fender/Fender_princeton_aa964_schem.pdf

IF you are simply wanting to change the DRRI to bias vary, then yes that is possible. Look at the 6G16

http://el34world.com/charts/Schematics/files/fender/Fender_vibroverb_6g16_schem.pdf

With respect, Tubenit
 

tmac

Goldmember
Gold Supporting Member
Messages
2,235
yes, it's complicated. unless you want to do a handwired rebuild of DRRI I wouldn't attempt it.
 

Axis29

Silver Supporting Member
Messages
3,489
An easier solution would be trying an Alexander Equilibrium pedal.

I have a '63 Vibroverb Reissue... the 6g16 Reissue. It has bias vary trem like the Princeton has. I miss the bias vary trem when I
m playing my Silverface Bassman or my 5e3 or '59 Bassman. I went on a hunt for a relatively easy solution and checked all kinds of pedals and trem units out. The Swamp Thing is mighty nice and was on my short list. But, I found the Equilibrium and couldn't be happier. it's a bit more flexible... The Mix knob is the secret sauce. Add a little dry signal in and you get the attack of the note, and as it decays, the trem takes over. Just like the tube tremolo in my Vibroverb and a Princeton.
 




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