The Amp Garage

JMFahey wrote:Hope it's not too late to congratulate you on such a cool idea

Thanks for the kind words!

Took me a while to get to it. This concept has helped me experiment, test out ideas quickly. I try not to get to comfortable....high voltage!

I'm certainly attracted to the "gee, whiz" factor of 3D printers like the Maker Bot. But practical applications for guitar amp builders are practically nil. Unless you need to make little figurines to sit on top of your amps. But! Desktop CNC! One-off circuit boards. Faceplates. Check this: http://...

I am in Santa Rosa. I see that you are in Chico.

I do automation/robotics in the Bay Area and I run into Chico engineering grads from time to time. Great engineering school out there!

Cheers,
Decko

Man, that is about a billion kinds of cool. Next, I hope you program a robot to do all the manual labor, so you can just choose a preset from a list of builds, and the robot reconfigures it for you in 6.9 seconds. Funny you should say that. Here is 4 Axis robot that I built last year. Vision guided...

The terminal strip still seems like a majorly cool idea to me. What about having permanent wires affixed to stuff like tube sockets, pots, switches, etc, but having the other end be a ring terminal so that you don't smash them? What are the leads that got smashed in the first place? Hi Folks, I fin...

Move the grid stoppers and grid bias supply to the power tube side of the switch (then you don't need a 2nd set). Also, tie 220k resistors to the 0.022uF caps of the PIs to ensure they still "see" ground when not is use (shouldn't pop this way). I think you may need to ties them to the Bias supply....

I'm thinkin' you have a DC level building up on the switch contact from the unused amp section. By using a resistor you can equalize the charge on that contact so there's little or no racket when you throw the switch. Sure would be nice to have a schemo of your switching circuit then we can show yo...

The circuits look identical, why would you switch between them into the same power amp? This is pure experimentation so I am not sure if this is going to work. (Keep in mind that I have PPIMV's and pre-master volumes on both channels.) What I am planning to do is: Set Express preamp 1 to high gain....

I'm thinkin' you have a DC level building up on the switch contact from the unused amp section. By using a resistor you can equalize the charge on that contact so there's little or no racket when you throw the switch. Sure would be nice to have a schemo of your switching circuit then we can show yo...

Hi Folks, I built two express preamps and included the PI on each. I connected them both to the same power section. I don't run them at the same time but manually toggle between the two using a switch. When I do this I get a nice pop sound. Is it possible to toggle between two PI's that share the sa...

What can you do with an iPhone 4s?

matt h wrote:Well, should you choose to ditch the tube requirement, feel free to hit me up about the transparent loop I designed.

I'd like to see it? Would you mind posting?

Quick question: could you incorporate a dumbleator style loop before the PI on the express?

Hi, I am building a stand alone power amp for experimentation. The current components being used are Komet style transformers with choke, full bridge rectifier, 5881 power tubes using a Dumble inspired PI circuit. My plan is to marry this generic power amp with a variety of stand alone preamps every...

Hi,

Lou designed up some boards for me a while back and they are awesome.

I'd like to join on this effort. I can help with $.

I have been looking to implement an EFX loop on some builds.

Cheers,
Decko

The active FX level makes a great master volume and allows a reverb or delay pedal in the mix. Hi 10thTX, your post caught my eye as I recently built an Express-like circuit with 5881's on the output using the same mv circuit that you have drawn up. I am very pleased with the tone. It is a very ver...