The Amp Garage

Amp no longer oscillates when gain and volume on full and activating boost switch. But it still oscillates when V1 (the boost tube) is pulled out. This may indicate you have your wires reversed, and you're getting positive feedback instead of negative. Swap your OT primaries (typically blue and bro...

Hi, and welcome to the board! First thing you need to do is disconnect the NFB loop (from output jack to NFB pad on your PCB) and see how this affects the noise and oscillation.

Welcome! All parts for ODS builds are readily available, if you're ok with modern components (like me; I have no attachment to "legendary" components--new stuff is perfectly good). I think Mercury iron is overpriced. I can recommend the PCBs from aaelectronics, a member here. https://www.aaelectroni...

Guy77 wrote: ↑Sun Oct 04, 2026 2:41 pmIs this the $20usd/mnth plan that gives you this feature?

Yes.

I recently used ChatGPT in live chat mode, using the desktop app, which can see your screen when you ask it to (automatically shoots a screenshot--you just say, "look at my screen"), in order to get up to speed quickly with Blender 3D. It was an amazing experience, like having an expert human on the...

Rock/Jazz switch is important to me. Think Marshall/Fender. Makes the amps really flexible.

Hi! Pots and switches are good to harvest, lamps, LEDs, neon bulbs, hardware. I don't bother pulling resistors. Certain caps can be worth it, but not many. Looking forward to your build.

Stevem wrote: ↑Fri Sep 04, 2026 9:54 pm What type of cover gigs are you playing that a 18 watt Deluxe is too loud?

Oh! Basically all of them! I can't turn my DR build up loud enough to get to edge of distortion on stage, so I added a crossline MV. Works pretty well. (Sorry to answer for OP. Carry on.)

Welcome! Why are there two layouts, side by side?

Snicksound wrote: ↑Sun Aug 30, 2026 1:53 pmHi there hello. Did you do the labels in Onshape too?

Artwork designed in Illustrator, exported as DXF after carefully editing to convert text to vectors and remove duplicate paths.

Even though your pot is sealed, Deoxit D5 is good at penetrating. You can drip some on the shaft where it meets the body, and set the amp so the knobs point upward.

Yes, I've used TukiCovers.com. Great stuff, reasonably priced. Tell them the dimensions, and they create a custom cover to your spec. They keep the data around for a few years. Look, it's custom Monkeymatic amp covers!: https://www.tukicovers.com/amp-speaker- ... onkeymatic

I use Zoho Billing to track my time/customers/invoices. But creating an invoice requires a lot of clicks, repetitive steps that are the same each time, and Zoho won't save my settings. I asked ChatGPT to help me automate the drudge work. It looked up the API, and we spent a couple hours working thro...

Instead of finding a use for the spare triode, I reduce the number of preamp tubes to two, and use a LND150 for the first gain stage. It's cheap, nice and quiet, and isn't ever required to create any distortion, so the fact that it's solid state doesn't matter in V1a.

I see your heater feed wires are twisted much tighter then they need be and this can be a problem, but not in regards to distortion. Learning something new every day! What issues can it cause? Insulation abrasion and shorting? Or something magnetic? How tight is too tight vs too loose? 2P After nea...