The Amp Garage

I finally got my Point-to-Point version completed. Maybe a final version of the schematic too? Maybe

I had to give up my bicolor indicator light on my V1 Cosmodrome in order to ground out the circuit in bypass mode because I'm unwilling to pay for a 4pdt foot switch. Use a relay. Put a Panasonic TQ-2 9V DPDT on the effect circuit board. This can make the effect itself be internally self bypassing ...

Just an update. That Dumble-ator needed a little more filtering and seems to be much quieter now. I noticed I can't ride the Master Volume on my SSS too crazy high or it will clip the first stage. Below about 7 seems fine... And there is tonnes of clean signal that it can put out to the PI still. An...

Well, I've learned I need to build and test the voltage booster externally before installing in the enclusure. Also, if I make another attempt at building one point-to-point, I won't bother with the socket and solder right to the IC. I got frustrated enough trying to troubleshoot, I ripped it out an...

So it was my intention to try that JBL E120 in the Mesa 4x12 with an ET65 and 2x M65 creambacks.... But the JBL’s frame is so thick that it needs longer bolts (which I have some) but that cab is the type that the bolts are part of the baffle and you unscrew the nuts behind the speaker... So that won...

For unfortunately my point to point Nixie Supply is not working out so well I dial it in to about 195 volts but it just slowly drops the B+ over the course of a couple minutes down to maybe 160 V which also puts the actual plates down around 100 volts. Anyways I'm not sure what is causing the proble...

Just finished wiring it up and dialing voltages. Will try it tomorrow since it is midnight now.

Over the years I've founding myself mixing different speaker types all the time (except for my single 1x12). It seems that it usually leans in favour of combining speaker strengths more than combining their weaknesses. Even though I'm often having to pick one speaker to actually mic for FOH on stage...

Trying a different approach with wiring this one:

I see this is from about a month ago, so I'm curious on what you have implemented since. I would probably keep that cut control permanent and external. I have hardwired a specific low setting for my presence controls and just put the cut control on the front panel in its place. Although I like it mo...

I get WAY more noise when i'm breadboarding any circuit. On my prototype tube-muff it wasnt right on the breadboard at all, but built on a boar in an enclosure it was just fine. Thanks Tony. That's a very hope-inspiring message to hear. I increased the dropping Resisters and dialed up the B+ a bit ...

Here are my current voltages. I'm currently running the power off a 12VDC wall wart and a single prefab nixie supply instead of the one from parts in my schematic. It has it's own heater supply that runs up about 6.7V, so that's why I have the big diode that brings it down to about 5.7V. When I buil...

I had to give up my bicolor indicator light on my V1 Cosmodrome in order to ground out the circuit in bypass mode because I'm unwilling to pay for a 4pdt foot switch. I was willing to add a green LED that glows under the tubes as long as the pedal is powered up though. Then when the effect is on it ...

Taylor has these cute little modules producing 150-200v from 2-16VDC in. Stewmac is using them in their new "Valve Factory" mini amp kit. https://www.stewmac.com/electronics/amps/amplifier-kits/valve-factory-1-amp-kit https://www.shop-tes.com/1363-hvps-vertical-low-noise/ Whoa, those are nice and c...

~300V is the correct voltage for the 12AX7 in a dumbleator, but using the subminiatures the correct plate voltage for similar operation is much lower, as you know. A 6112 is a bit lower gain than a 12AX7 so you might want to play with values to get it to sound right, but the nice thing about using ...