Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: plexi50 on November 08, 2012, 02:29:10 pm

Title: Princeton Reverb Output Transformer
Post by: plexi50 on November 08, 2012, 02:29:10 pm

I have seen three websites advertising the Princeton Reverb output transformer with 3 different specs.
One site says 6K impedance and the others says 8K and 8.5K impedance. What is the original spec?

Title: Re: Princeton Reverb Output Transformer
Post by: jjasilli on November 08, 2012, 03:19:11 pm

One of my "bibles" -- Dave Funk's Tube Amp Workbook -- shows all Princetons from 6G2 through PR's AA1164 & B1270 used the same OT #125A10B @ 8 ohms.

Title: Re: Princeton Reverb Output Transformer
Post by: echuta13 on November 08, 2012, 04:29:59 pm

I'm "was" pretty sure the originals were 8K, but the Mojo's and Classictone tranny's are 8.5k, so I'm not sure sure now..  :dontknow:.

Title: Re: Princeton Reverb Output Transformer
Post by: plexi50 on November 08, 2012, 07:06:05 pm

I wish i could find an original one and let the vintage mojo do it's thing without so much research
If i could find an original i would buy it. 

Title: Re: Princeton Reverb Output Transformer
Post by: phsyconoodler on November 08, 2012, 09:50:07 pm

PR's were 8k. Deluxe Reverbs were 6.6k.  I've used Deluxe OT's in PR builds and they sound great.

Title: Re: Princeton Reverb Output Transformer
Post by: stratele52 on November 09, 2012, 03:59:15 am

I don't know what is the original but you can use any transformer from 6k to 8.5

Hammond Transformer sugest a 8K for this amp.. IMO hammond built transformer since Leo Fender made amps , so the specs could be same.

http://www.hammondmfg.com/guitarLineOT.htm (http://www.hammondmfg.com/guitarLineOT.htm)