The Amp Garage

Thanks, Ryan! Let's hope it sounds as good as it looks

Curiosity got the better of me, so I powered the unit up yesterday without any tubes plugged in. No blown fuses so far! Yay!

markusw wrote: ↑Mon Jun 16, 2025 8:40 pm Incredible work!

Thanks, Markus!

ThePanda wrote: ↑Mon Jun 16, 2025 9:34 pm Head looks great!!
You built it yourself?

Thank you! Yes, the head was built by me.

Thanks, Martin! You're a gem! Alright, I checked the wiring of the whole amp again - looking good, no flaws found yet! I installed the preamp board yesterday and will check wiring again when I'm a little less tired. I think, I'll be ready to fire this thing up next weekend. https://i.imgur.com/IYr7a...

Yes, or use the MV to dial it in. You will need something like 2.5V rms. The reason for injecting the signal at the power amp input is that you want an undistorted sine input, which may not be the case if you go through the preamp. Ok, just to make sure I got that right: 1. I connect a dummy load t...

You must have a dummy load connected to the output, so measure RMS voltage there and adjust to 50% power calculated as I^2 R When determining the actual RMS power output of one of my builds, I would inject a sine wave into the preamp, hook a scope probe across a dummy load and crank volume until th...

I'm a little confused with the instructions to set the PI balance in @beasleybodyshop's schematic. Three questions: 1. Power amp input = the point right before the .02uF cap right after the master volume output? 2. I don't really get point 3 (see picture). Where am I supposed to set the output level...

Feel free to post any errors here and i'll get around to correcting them and updating the layout. Once I've finished my 005 build I will post a layout and schematic of my amp. My build is 95% the same as yours, so the differences should be easy to point out. Just give me a few weeks more time. Mayb...

Nice looking chassis! Take your time, there are builds on this forum that literally took years to finish

Looking great! I would be testing this in sections as you go to make sure that all that careful work won't need to be torn up if something is miss-wired. Thanks! Right now, without the preamp board installed everything is easily reachable. In fact, I had the amp already powered up at different poin...

Okay guys, here's where I am at the moment. I have pretty much wired up a large portion of the chassis with the preamp board being the only missing part: https://i.imgur.com/NWo5Nmc.jpeg Here's the EQ section with a close up shot on the Jazz/Rock, Deep and Bright toggle switches: https://i.imgur.com...

Guys, is this correct for the FET boost? Voltage divider is 150k/8.2k, source resistor is a trimpot set up as a variable resistor. Going for the lower headroom bias I used a 9.0V power supply and set drain voltage to 3.0V (Vdd/Vd = 3.0 according to Martin's instructions). https://i.imgur.com/DmPIiPu...

Your amp looks beautiful! Especially your faceplates!!! I was curious were they made with anodized aluminum? Also what brand of caps did you use for the High Filter? Congrats! Guy Thanks guys! The faceplates are indeed anodized aluminium with UV print. Really well made but not cheap! I used Mica ca...

I haven't really worked on this amp for about a month, but I'm starting to see the end. I will post some updates soon!

Y'all need Jesus!

jbrrrrr wrote: ↑Fri May 23, 2025 10:37 am

captaincoconut wrote: ↑Fri May 23, 2025 10:25 am Does he explain the BBC-1 in the video? Never heard of it. What is it?

NSFW

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