It's attached to the first post of the old thread you linked in your other post (attachments are only available when you are logged in).
Did you read that whole thread for pointers on what to check?
https://www.ssguitar.com/index.php?topic=3769.0

Quote from: phatt on April 03, 2026, 08:26:47 AMMy Advice is wait till the pedal comes then plug that into the Power input on the back of the Katana,,,, then make up your mind if the amp build you propose (which is going to be Expen$ive) will actually be worth all the effort.
Phil.

Yes, that's what I thought at first. However, even when connected to the KATANA's POWER AMP IN, the KATANA's CAB RESONANCE is still enabled, and since the enclosure is made of MDF, I'm worried about sound degradation due to passing through unnecessary circuits, so I want to proceed with this project.

I'm curious to know if the, Presence, Resonance, and Dynamics circuit could be added to a tube based power amp I've built. Reproduce the Op Amp filter circuit and add it to the input of the power amp.

Silverfox.

Quote from: phatt on April 03, 2026, 08:37:01 AMHi Silverfox,
              Be aware, Stereo sounds great in a small room or on recorded music it shines.
Reality check; on stage it adds little and can just disappear in the mix.
If you want big spectral sound on stage,,, get a Leslie speaker which delivers a far more realistic stereo sound on stage.
Phil.

Yes. I'm realizing I don't need stereo. Thanks.

Silverfox.

Quote from: aquataur on April 02, 2026, 03:18:06 PMIf the T-Dynamics pot is faulty, then this is the first thing to address if you feel like it has no power.

The T-Dynamics shifts the workload between preamp and power amp. It throttles the preamp back and pumps the power amp up and vice versa. This makes for a loose vs. compressed tone.

Those amps normally are as loud as hell with the control CW.

Unfortuntately, the pot is a specialty. This does not happen for the first time. Look up the Peavey forum for a fix.
Bridging the pots with resistors mid-way does not do the trick.

Thanks for the information. The pots are wired so that one value increases, and the other decreases. I've contacted Peavey regarding parts. They seem to be willing to sell them to me. However, if I can't get that specialty dual pot, why wouldn't bridging those two circuits with say, a 7.4k, and 2.5k resistor work. That would be the half way point between the dynamics setting?

Another question: I presently only use the power amp in, with an amp modeler, so perhaps, due to the signal level of the modeler output, that is why the amp didn't get as loud as expected. I played through a Peavey 1-12 tube amp before and that was loud. I mean shake the winders loud! The neighbor down the street wandered over to ask me to turn it down as his windows were shaking.

Thanks for the information,

Silverfox.

Any update fixing the hum on this amplifier?

Has anyone has a schematic of the Crafter DSP1 amplifier?

Someone in this forum reported 11 years ago that his Crafter DSP1 guitar amplifier is making a constant hum but he was unable to fix it.

https://ssguitar.com/index.php?topic=3769.0

I have recently bought the same amplifier and it's also making the same constant hum even with no input, exactly as he described. I am unable to contact the author, and ask him if he made any progress or if he can sen me a copy of the schematics.

I am an electronics engineer so I am hoping to continue wjhere he left off, or has anyone in the forum found what cause the hum in this amplifier. Any help is greatly appreciated.

Hi Silverfox,
              Be aware, Stereo sounds great in a small room or on recorded music it shines.
Reality check; on stage it adds little and can just disappear in the mix.
If you want big spectral sound on stage,,, get a Leslie speaker which delivers a far more realistic stereo sound on stage.
Phil.

My Advice is wait till the pedal comes then plug that into the Power input on the back of the Katana,,,, then make up your mind if the amp build you propose (which is going to be Expen$ive) will actually be worth all the effort.
Phil.