Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: 72Blazer on August 30, 2021, 08:34:15 am

Title: Looking for suggestions for this transformer specs
Post by: 72Blazer on August 30, 2021, 08:34:15 am

Any thoughts on using this for a Hoffman amp build using 2 6v6 or 2 el84s?

Vr
J.

Title: Re: Looking for suggestions for this transformer specs
Post by: sluckey on August 30, 2021, 09:00:38 am

That'll work but you will have to slightly modify Hoffman's amp circuits to use a FWB rectifier.

Title: Re: Looking for suggestions for this transformer specs
Post by: 72Blazer on August 30, 2021, 09:59:59 am

After doing a quick read on Robs site, I cam eacross this.  So if I were to build say, a Deluxe Reverb Clone using this PT (no CT), I would need to implement something like this?  Top right quadrant

Title: Re: Looking for suggestions for this transformer specs
Post by: pdf64 on August 30, 2021, 10:11:10 am

It could be made to work, yes, but it would be nonsense to describe such as creation as a DR ‘clone’.

Title: Re: Looking for suggestions for this transformer specs
Post by: 72Blazer on August 30, 2021, 10:29:37 am

Yes, just looking for a worthwhile project for this transformer.  I found it for sale for $25.00.

Title: Re: Looking for suggestions for this transformer specs
Post by: sluckey on August 30, 2021, 10:43:53 am

A DR needs a fixed bias supply. Still doable with that PT but requires a slightly different bias supply. Do some homework.

It would be simpler to do a 5E3, or stout, or some other cathode biased amp. Heck, you could even do a cathode biased DR.