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Working on a maestro FZ-1, running on 2-AA, 3v, positive ground. no voltage inverter, no AC adaptor. and I can't figure out how to wire the LED(s). 2? why 2? one is there to let the end user know that the power is on. there is an on-off toggle on the negative to conserve battery. annnnnnnd I...

So I've found myself with a buttload of these pulled out of an old electric organ. Appears to be National Semiconductor: 065 (break) 00 (break) 711 I'm not versed enough in JFET specs to know what this compares to or where I can use it, I generally just use the JFET I'm told to use 😅. What...

Howdy. I gave this program a couple hours long spin and would like to share my experience. https://verodesigner.vercel.app/ a free HTML based app that quickly and intelligently creates a vero layout from a schematic. the short version: for being free, it's downright incredible. next to no...

A little over a year ago I posed about the germanium Hirstute Fuzz Vintage Deluxe, a shimmery purple affair with a switchable pre-gain and a giant VU meter in the center. My interest in getting more out of a fuzz face has not ceased. So now I present Hirsute Fuzz Vintage Silicon. Powered by...

Howdy. I've got a VHT Special 6 Ultra that was purchased for the singular purpose of demoing pedals for videos. It needed a couple things to make it more flexible. Firstly a selectable bright cap on the "Ultra" channel. It's really dull under half. Added diode clipping per Rob Robinette's...

Howdy I’m wondering if there’s an easier, smaller parts count approach to making a fixed gain low shelf eq, essentially a baxandall with the bass dimed. It’s going at the end of an HM-2 eq circuit to make up for the steep low end drop off. It never needs to be adjusted. Specifically a shelf...

I’ve built it. It’s cool. But that unfortunately didn’t lead to me understanding this hard clipping arrangement. The resistor and cap, what are they doing? I’ve never seen this before.

Working on a PWM style bass synth thing and I can’t seem to get enough clean boost into the input of the 40106 for it to register. If I crush it with distortion, it gets loud enough, but it’s messy. Currently I’ve got the amz my amp driving a 386 with 1 and 8 jumped and it is working, but it’s...

has anyone opened one of these up and seen what makes it tick? i had someone ask if i could replicate it since they are always out of stock, and i can't find anything. the cmos hex inverter thing is WAY over my head https://www.broughtonaudio.com/product-page/synth-voice-deluxe

The last few months I have been on an intense deep dive with the Fuzz Face topology. I have made what I consider to be the best possible Si FF's in varying gain ranges, I've made them 1590L sized, I've considered anything that the end user could possibly want or need. This all stemmed from a...

I was fighting for my life trying to come up with a thread title for that, hope it isn’t too confusing I have built a fuzz face with a regular bypass footswitch on a 4pdt and a pre-gain control that is bypassed by a 3pdt footswitch. The pre-gain/ channel switch has a 2 color LED to indicate...

plotting a power amp build and want to put an EQ and volume control out front. basically a take on a SD powerstage. The power amp module has a built in PSU and an auxilery bipolar 12v output. I've heard people say that running an op amp circuit off of ±V instead of +V/VREF is an easy mod, but I...

alright braintrust, here's a fun one. I was sent a vintage Rosac to check out/repair/mod so that it is no longer powered by 2 separate 9v batteries. It works fine on a battery, he said, but a voodoo lab power supply to battery snap adapter made terrible noise. those were my findings exactly...

Hello all, I’m looking to add a mod boost eq to the front of an existing circuit. I know the Clapton mid boost exists, but it is huge. Hoping for something op amp based. Just need to be able to switch in some mids to goose the front end. The zorkmid has this sort of boost, but the build doc...

howdy just built up the boogie monster running at 18v, biased all nice, and it sounds great for the heavy rock and metal stuff. all the rectum frier tones i could ever want. but even at A1M, seemingly the most subtle of all pot tapers, the gain knob is like a switch. almost no sound to BAM as...

this should be one for the ages. I was asked to take a look at this bad stone for repair. I made no promises, but said I'd take a look. shewwwww boy does this thing smell bad. and the work in here might be worse. it would seem there was an attempt to remove the manual phase option. Can't say I...

working from this layout, which i know is unverified and has no support in the comments. built it, checked it a hundred times, i'm confident that my build is solid, but the layout might be an issue. used 5532 op amps. got no output signal. with an audio probe i was getting signal at pin 3 and...

ground loop stops when i hold both cables for the key/thru. is there supposed to be a ground between them? because it isn't shown on the wiring guide. very little signal is getting through. LED stays blue no matter what. guitar into key > key out to dist pedal in > dist pedal out to gate input...

hoping to get a bass rolloff knob to the delay'd signal. it's just so murky, and i'd like to be able to dial that out a bit. other schematics have a passive filter either before or after the mix control. the cataclysm delay has a BMP style tone stack, and that's too much. electric canary's...

the chorus is chorusing, the bias is carefully set, everything sounds good except when the pedal is engaged i'm loosing about 6dB from 500hz up (reamp box, pink noise, RTA, i'm not a cyborg). as soon as it's bypassed, the high end comes back. checked connections, checked components, nothing is...