Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Rlaak on October 15, 2020, 02:45:08 am

Title: 1 tube reverb in cj11
Post by: Rlaak on October 15, 2020, 02:45:08 am

Guys,

I just build a cj11 according to the much shared schematic on this forum. BF tone stack and tweed dlx power amp. I biased tubes marginally warmer (2.7k iso 3.3k) and i just love the amp.

To make it even more verstatile i'm now thinking of adding a  1 tube reverb (also the much shared version on this forum).

The question i have is where i can best insert the reverb ?
My current thinking would be to insert it after V1b.

CJ11 - https://el34world.com/Forum/index.php?action=dlattach;topic=22094.0;attach=65726
OneTubeReverb - https://el34world.com/Forum/index.php?action=dlattach;topic=7957.0;attach=11276

Anyone experience with this ?

Thanks a lot Ron

Title: Re: 1 tube reverb in cj11
Post by: tubenit on October 15, 2020, 05:30:46 am

I would try this but be prepared to experiment and tweak.  This is what I have in one of my current amps.  You can also try a 12DW7 with this.

While nothing to do with the reverb, I'd be tempted to change the post phase invertor caps that are .1 to .047.

With respect, Tubenit

Title: Re: 1 tube reverb in cj11
Post by: HotBluePlates on October 15, 2020, 05:00:05 pm

I've heard quite a few of Tubenit's amps with the 1-tube reverb he showed, and they all sounded excellent!