The Amp Garage

Tried to use Grok to assist my son with a school project and Grok made impressive drawings and videos, but they were rubbish. I persisted with it for about two weeks and I had to abandon it. I tried Gemini and it doesn’t do drawing which was helpful as I didn’t waste time. I didn’t have Claude at t...

Tried to use Grok to assist my son with a school project and Grok made impressive drawings and videos, but they were rubbish. I persisted with it for about two weeks and I had to abandon it. I tried Gemini and it doesn’t do drawing which was helpful as I didn’t waste time. I didn’t have Claude at t...

I've never heard about low ESR being an issue in linear power supplies. Low ESR is a good thing, runs cooler.

Where did you hear that?

pdf64 wrote: ↑Wed Sep 16, 2026 2:04 pm

desertmouth90 wrote: ↑Wed Sep 16, 2026 12:56 pm ... all fuses are fine, I dont get it... HT and Mains (and I know what the burnt ones look like as I kept them haha!)

A failed fuse can appear fine.
Please check them with a meter.

This. I've been tricked before. Check continuity before assuming.

Do you make the pot/jack and chassis models yourself? Pot and jacks 3D models come from internet. I built the chassis in OnShape myself. Hi there hello. Did you do the labels in Onshape too? So far I have been successful in designing my own chassis in there, and even did the labels... But I can't s...

It is correct that on the original SLO, the Normal (Clean/Crunch) channel is still active and unmuted when the Overdrive channel is active. It is also out of phase so it actually cancels out some stuff I believe the newer versions that use relays instead of optocouplers no longer do this, but I coul...

Fun fact: if you flip the wires around, it sounds exactly the same (unless you do it to only one speaker in a multiple speaker cab)

Wanted to add, in the context of NFB, we typically reference the negative side to ground. Therefore the - becomes the 0V GND reference, so on negative swings the "+" side simply swings negative. Like I said, we call it positive by convention. It can carry a negative signal as well, seeing that we're...

The + terminal is not referenced to ground or 0V (that would require a 3rd wire), it's referenced to the - terminal. These are conventions we use to make sure the speakers are wired in phase. It works like any other AC signal. The signal is not split between positive and negative swings (e.g. the ph...

Would this work for you? It's just a 3PDT and a DPDT footsw w/ leds and led current resistors. Basic Footswitch Rev1.pdf The point is really to use an off the shelf Apex ASFS2 dual button footswitch, because a touring guitarist can pick one up literally anywhere in Canada at any Long & McQuade. Sho...

Snippet from a funny recent discussion (note this is the "Pro" version of Gemini). I asked a question to the Gemini iteration within Google search, then asked the same thing to the standalone Gemini Pro on my phone and the two answers were contradictory (had to do with voltage handling of a specific...

Yeah it can be a double edged sword... I like it for brainstorming ideas and doing quick math I can't be bothered with when just ideating stuff. But then I start running the numbers myself and realize a crucial element was missed. But it sure "feels" good to have a willing assistant you can talk wit...

That's roughly what a Mesa Badlander is, except the pre tone stack has hardwired value, and the post gain tone stack is driven by a cathode follower in traditional Marshall style (has the 33k slope and 470pF treble cap too)

For fun, this is what I'm planning for the "12V" supply (that will only be used for switching and panel LEDs) Basically, a delon voltage doubler from the unused 5VAC tap. I used to do this then regulate down to 5VDC for relays, but realized I was getting 12V+ before the regulator and said regulator ...

This is easier if we start from the beginning and define the desired behavior and map it out logically. You've got two switches, which equal 2-bits of logic. From 2 bits of data, you can get four conditions: 0 + 0 = A 0 + 1 = B 1 + 0 = C 1 + 1 = D What this tells us is that with two switches, we ca...