Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: rzenc on February 25, 2026, 09:12:18 am

Title: Amp for testing pedals
Post by: rzenc on February 25, 2026, 09:12:18 am

Hello, guys.


I want to build an amp for testing pedals. What you recommend?

PWR ~30W

Best regards

Title: Re: Amp for testing pedals
Post by: sluckey on February 25, 2026, 09:25:04 am

I would use my Fender AB763 Deluxe Lite II.

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

If you want more than 20W, just use bigger transformers and 6L6s.

Title: Re: Amp for testing pedals
Post by: JPK on February 26, 2026, 07:48:39 am

That's a nice build doc. A clean Fender style amp is great pedal tester.

Title: Re: Amp for testing pedals
Post by: pdf64 on February 26, 2026, 09:28:25 am

Just to note that the AB763 Deluxe tonestack used a 47nF mid cap; a very swift revision from the 33nF mid cap of the AA763 :)
It wasn't until the Deluxe of 1990s (Hot Rod  :laugh: ) that it was changed to 22nF.

I get the impression for amps intended for use with 12" speakers, Fender preferred a 47nF mid cap, but preferred 22nF in amps intended for use with 10" speakers.

Title: Re: Amp for testing pedals
Post by: stratomaster on February 26, 2026, 09:55:23 am

By all means build something, but for maximum flexibility I like the older solid state Peaveys for pedal testing.  Many have a power amp in for preamps, and the sweepable mids makes the preamp capable of being similar to many other topologies.  An old Renown lives in shop for testing all kinds of things for this reason.