Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Toxophilite on February 26, 2014, 09:44:45 pm

Title: Effects loop in single channel AB763 deluxe style amp
Post by: Toxophilite on February 26, 2014, 09:44:45 pm

Hello
I'm wondering where I would insert an effects loop in a single channel AB763 style deluxe amp
I'm thinking right before the PI. Is that right?
And what would be the best way to go about it?

THanks!

Title: Re: Effects loop in single channel AB763 deluxe style amp
Post by: sluckey on February 26, 2014, 10:02:41 pm

Look at the schematic on the bottom of this page for a simple passive loop.

http://home.comcast.net/~seluckey/amps/november/november.htm (http://home.comcast.net/~seluckey/amps/november/november.htm)

Title: Re: Effects loop in single channel AB763 deluxe style amp
Post by: kagliostro on February 27, 2014, 02:24:59 am

The passive FXLoop is the easiest solution and has a low impact on the existing amp

if you need an active FXLoop you can consider also a stand alone unit like the Dubleator

for a layout you can use the Ceriatone C-Lator version

(http://www.ceriatone.com/images/layoutPic/OvertoneLayout/C-Lator.jpg)

and if you prefer SS the Klein-ulator

(http://i.imgur.com/QMO1Viy.jpg)

K

Title: Re: Effects loop in single channel AB763 deluxe style amp
Post by: tubenit on February 27, 2014, 05:01:55 am

Simple passive effects is very easy to do and works well.

IF you want an active effects loop that is on board, then you can consider this from ARCHIVES:

http://www.el34world.com/Forum/index.php?topic=10208.0 (http://www.el34world.com/Forum/index.php?topic=10208.0)

With respect, Tubenit

Title: Re: Effects loop in single channel AB763 deluxe style amp
Post by: Toxophilite on February 27, 2014, 04:33:00 pm

Most Excellent and thank you all!
I have a Keil spring reverb unit pulled from an early 60s organ
I alligator clipped it in just before the PI and it sounds lovely..Huzzah Reverb!
Now I'll have a S.lucky Ab763lite frankentremedeluxeSSreverb!
I believe an acronym might be in order
Now I'm kicking myself for selling a tube organ mate last year!

Still this SS keil unit is very nice sounding

A few female RCA jacks installed and some tweaking of the control pot and it should do the trick nicely