Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: clyde on December 13, 2016, 03:18:53 pm

Title: Adding Reverb to Sluckey's AC15
Post by: clyde on December 13, 2016, 03:18:53 pm

Has this been covered before?  Steve?

Title: Re: Adding Reverb to Sluckey's AC15
Post by: sluckey on December 13, 2016, 03:25:01 pm

I don't recall any discussion. IMO the AC-15 is complicated enough. Build a Revibe instead.

Title: Re: Adding Reverb to Sluckey's AC15
Post by: kagliostro on December 14, 2016, 05:48:22 am

Here is the documentation I have about the VOX AC30 Reverb

(http://i.imgur.com/kBoMlFq.jpg)

(http://i.imgur.com/e7K3UfE.jpg)

this layout is a bit customized, but is the only one I've

(http://i.imgur.com/4Pz2iLE.jpg)

But .... there is a problem, VOX didn't used a standard Reverb Tank, they used a special unit build using a pair (one for each side) of turntable heads

(http://i.imgur.com/powoTtD.jpg)

I don't know if the circuit, as is, can be used with a standard Reverb Tank

Franco

Title: Re: Adding Reverb to Sluckey's AC15
Post by: clyde on December 14, 2016, 10:04:13 am

Thanks Franco, that's totally bizarre!  I only have one extra cartridge and it's a little dear to get another.  I may have to dumb it down a bit and just do my own design with 2 x EL84 using the proper transformers.  I sure would like to keep the EF86 but I'm using a Princeton Reverb chassis and control layout so it has to conform to that.  Many thanks guys. 

Title: Re: Adding Reverb to Sluckey's AC15
Post by: pompeiisneaks on December 14, 2016, 10:07:17 am

as far as I recall, the EF86 version and the 12AX7 versions have the same number of tubes, so you don't need to sacrifice that desire, the circuit only loses a couple extra components for the Pentode but then the 12AX7 has two gain stages so it may actually be net lower parts list for the EF86.

~Phil