Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: lego4040 on November 13, 2013, 02:39:36 pm

Title: adding dwell to a princeton reverb
Post by: lego4040 on November 13, 2013, 02:39:36 pm

I read the year old thread on adding a dwell to BF Reverb and it mentioned replacing the  1m resistor to driver of the reverb (12at7 pin 2) with a 1MA pot.  from looking at the schematic posted it looks like leg 1 on pot to ground, leg2 to driver(12at7 tube pin2) and leg 3 to 500pf cap. Is this correct, I would like add so I have more control over reverb. I hope to be building the BF Princeton Reverb

Title: Re: adding dwell to a princeton reverb
Post by: HotBluePlates on November 13, 2013, 03:39:00 pm

Yes.

Exactly like replacing that 1MΩ resistor with a 1MΩ volume pot, and wired the same, with the circuit connections you mentioned.

Title: Re: adding dwell to a princeton reverb
Post by: lego4040 on November 13, 2013, 05:40:28 pm

 :happy1: I got it right. I knew pedal building would pay off. Thanks for the feedback

Title: Re: adding dwell to a princeton reverb
Post by: Willabe on November 13, 2013, 06:14:09 pm

 :thumbsup:

Title: Re: adding dwell to a princeton reverb
Post by: lego4040 on November 13, 2013, 08:41:24 pm

There just isn't enough time to read and try to understand all this tube design. I am trying to understand what I need to be able to tackle my next build a Blackface PR. I would love to build a tweed 5F11 but it doesn't have reverb. I just read Hoffman's how to add reverb to a western electric circuit, which is based on a Marshall and didn't Marshall base his circuit on a early Fender Bassman. So with enough research and reverse engineering I'm sure you can add tube reverb to a tremulox with the addition of $$$$$. Man is this fun