Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: phsyconoodler on December 19, 2011, 12:27:13 pm

Title: champ ot for reverb?
Post by: phsyconoodler on December 19, 2011, 12:27:13 pm

Can you use a champ OT for reverb on a Vibrolux Reverb?The reason i ask is I have one laying around and was wondering if it would work in this application or will the impedance difference be too much?

Title: Re: champ ot for reverb?
Post by: HotBluePlates on December 19, 2011, 04:49:53 pm

No, it doesn't make sense.

The primary impedance is very different. What you may be recalling is Gerald Weber's suggestion to use a Champ OT for the reverb driver in a Fender standalone reverb unit. The primary impedance to make 6V6/6K6/EL84 work in that situation is very similar across all those tubes. Not really so for paralleled 12AT7.

Retail prices on a replacement reverb driver OT are almost half the price of a Champ OT.

Title: Re: champ ot for reverb?
Post by: stratele52 on December 19, 2011, 06:09:22 pm

+1 HotBluesPlate,

At tubesandmore reverb driver transformer are $13 and $16 , primary impedance are 25 k . Champ output transformer have 7 k , Not the same.