Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: roseblood11 on June 22, 2023, 09:44:05 am

Title: Deluxe Reverb without Reverb
Post by: roseblood11 on June 22, 2023, 09:44:05 am

Hi,
I'm planning to build a one channel amp, that has exactly the sound and gain structure as an AB763 Deluxe Reverb - but WITHOUT THE REVERB. How should I modify the circuit? Leave the 3.3M, 10p and  the 150k to gnd ( = 470k and 220k in parallel) in place? What would you recommend?
http://www.brieskorn.de/Guitar___Amps/Verstarkerprojekte/AB763/circuit_mod.pdf

Title: Re: Deluxe Reverb without Reverb
Post by: labb on June 22, 2023, 09:59:36 am

Take a look at this. should give you an idea of how to procede. Princeton Reverb Delete (robrobinette.com) (https://robrobinette.com/AA1164_Princeton_Reverb_With_Reverb_and_Tremolo_Deleted.htm)

Title: Re: Deluxe Reverb without Reverb
Post by: pdf64 on June 22, 2023, 01:01:32 pm

Quote from: roseblood11 on June 22, 2023, 09:44:05 am

Hi,
I'm planning to build a one channel amp, that has exactly the sound and gain structure as an AB763 Deluxe Reverb - but WITHOUT THE REVERB. How should I modify the circuit? Leave the 3.3M, 10p and  the 150k to gnd ( = 470k and 220k in parallel) in place? What would you recommend?
http://www.brieskorn.de/Guitar___Amps/Verstarkerprojekte/AB763/circuit_mod.pdf

That schematic doesn’t have tremolo but has a type 4 master volume and a switched bright cap with much higher value (labelled presence).
It may be a good idea to list all the features you want.

Title: Re: Deluxe Reverb without Reverb
Post by: tdvt on June 22, 2023, 01:28:18 pm

Quote from: pdf64 on June 22, 2023, 01:01:32 pm

It may be a good idea to list all the features you want.

Agreed, as there are many well documented versions of single channel Fender circuits already out there, some with little extras (or not)

RobRob's BLACKVIBE is an an AB763 with no trem & no reverb. To me, this design seems like a nice clean starting point & I believe it has also undergone a few versions-worth of sorting.

BLACKVIBE LINK (https://robrobinette.com/RR763_BLACKVIBE.htm)

Title: Re: Deluxe Reverb without Reverb
Post by: Esquirefreak on June 22, 2023, 01:43:43 pm

Another option is to build a single "normal" channel Bassman AB165 with a AA864 power section. A pot/divider between the 2nd and 3rd stage and a type 2 MV after the PI makes for a very versatile amp. I build one like that for a friend.

/Max

Title: Re: Deluxe Reverb without Reverb
Post by: sluckey on June 22, 2023, 02:10:17 pm

If you may be interested in a single channel (normal channel) Deluxe AB763 look at this...

     http://sluckeyamps.com/misc/AB_Lite_II.pdf