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Finished drilling tonight. Not my best work but it should function. Next is tin, then swaging eyelets

Where are you seeing ~100V on the phase inverter plate? Should be around 300V. Mark III schematic I’ve seen shows 285 or thereabouts

I've felt comfortable using a 250V for the "common grid" 100n in the LTPI. I've always suspected R. Smith was inspired by the Fender Bassman 70 / 135 amps, those schematics call for a 200V cap there. DC is important, but I also look at the extremes seen with signal applied. Looking at some...

IIB were my favorite, the most Fender-ish. Bummed when I saw they included the lead mode of the IIB instead of the clean mode in the VII.

Looks like Magnetic Components is the MFG, I can’t tell you the date code though

Usually amps are rated for average power at a chosen THD based on a sine wave input. As distortion and clipping increase, so does power output. The rule of thumb is make sure your speakers can handle 2-3x the nameplate power if you’re going to push it hard

I've had honk that I couldn't dial out, but it was always cabinet related. EV 12Ls were the worst offender. Now I have Boogie V30s in a Marshall slant, with some pillow stuffing in there and I'm pretty happy. The Boogie V30s sound way different to me vs normal Celestions

Got the preamp board etched, let the fun begin

What cab / speaker are you using

Not intentionally. There is one capacitor different, I believe it’s outlined in the Mark V owners manual

I print my artwork onto transparencies via a laser printer and use presensitized double sided boards. Then I expose to UV and develop the image and etch the board in ferric chloride, so both sides are etched at once. I’ve never seen the underside of an RP11, and never have I seen the top side...

Thanks for the condescending feedback!

You had asked a question about whether there was a resistor underneath a capacitor on the EQ board. It will be thru hole, but not plated. I’m going to use eyelets and vias

The socket holes will be drilled so I only mark the centers in the artwork. No board factory, I’ll make the PCB at home as I’ve made the other boards

Nope, nothing underneath

3D rendering of the preamp board from KiCad. The design is wrapping up, time to start building soon

Thank you! Not sure what you mean by extra 1M, I used a 1M instead of the 470k shown for R33 in the schematic below that I got from the sloclone site. The one between the caps on the right is R34 and the one in the top right corner is R33 as shown. If you're referring to R34 as extra, it was...

I’d be wary of what you hear from amp techs on YouTube, I haven’t been very impressed by any I’ve seen. There may be some folks that repair electronics for a living lurking around, they would have better insight than me. I’ve never had one fail but from what I’ve read, tantalums are sensitive to...

That’s an image of the card I’m designing for the IIC+ circuit. It’s based off of RP11s

Holy crap, yeah it did! And yes, those resistors drop voltage in the power supply, although not very much since their value is relatively low and there isn't much current. Their primary purpose is to decouple the different power supply nodes and increase filtering. It was common practice to...