Hi, I'm putting together a Troglodyte fuzz from the layout on dirtboxlayouts.blogspot and just wondered how critical the choice of NPNs are for Q1 and Q2. I've got a couple of low hfe (≈150) and just figured I'd throw them in there and see.

Troglodyte Fuzz.png

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Does anyone have a schematic for this, or know how it differs from the Distortron i.e. just bigger caps for ins/out and feedback loop?

Pretty surprised to find this official Honey Bee schematic along with a DIY kit:

Might be old news to some, but I wanted to upload the schematic before it disappears.

Wasn't sure if I should bump the old BJF Honey Bee thread from 2009, the values all match up but I guess it is technically a different version. The old thread is a nice time capsule, pretty funny to see comments like I hear Honey Bee's are vapour wear and may perhaps not exist other than in cyberspace;)

I added all the...

Has anyone dissected one of the XTS iridium Fuzz pedals? Love the sound demos on youtube.
I have read that it has Red Llama DNA.

I want to build or purchase an affordable EL34 power amp, either 2x rack unit or small head format. Absolute maximum 50W, ideal 10-20W, as it is just for playing and eventually recording at home. Only power amp & phase inverter, no preamp, as i have a gazillion preamps either made or in the making for it, and a valve head already.

Any recommendations on DIY kits or ready-made products that have a good quality-price ratio?

Thanks in advance!

I was lucky to get Exar OD-1 in good condition for a reasonable price, so I thought I must trace it. Many legends are around that pedal, and pricing on the used market went too far, significantly after JHS added it as one of the modes in Bonsai pedal. I hope my trace will help reduce insane prices on those, sometimes higher than vintage TS ones.

original_5bb4449c-5f0c-4b62-84fb-47712bc87d1f_PXL_20230104_103012686.jpg

I got my unit with a box and price tag on it that says 370,000 PLN, and...

Davoli DTE 1051T.jpeg Davoli DTE 1051 T.jpeg Davoli 1051T 02.jpeg

The schematic is not complete, what are the stages to the right? And where's the ECL86 pentode stage?
Still the schematic lists the tubes as:
V1 ECC83
V2 ECC83
V3 6AV6
V4 ECL86

Is very much like the little pink amp a restored a few years back. That one was sold off, I just had too many amps around the house, and too little time to play them all. Little Pinkie was very wanted, just because of the color. But it also meant that I had to spend about 275 euro to wrestle it from the hands of some Flemish hipster soccer milf. It needed new tubes, a whole bunch of rewiring, filter caps and a new speaker. Then the guy who bought it haggle down to 350 euro, though I wanted 375....

Have some spill over on channel b and boost not working on one side and led light stays on on boost

Hello

I have been looking for a schematic for the ADA MP1 channel pedal, but no luck. This is the tube pedal. I looked at the VAULT ( and contacted MarshallJMP who sells parts for the old ADA devices.

I also looked to purchase one the pedals, but I do not see them for sale.

Please let me know if you have a schematic you could share, or maybe someone that has one and would be willing to take pictures.

Thanks
Rob

Internal view at 6m7s:

Another Exar pedals tracing, this time it is not one but two effects at once - MT-02 Metal and BM-02 Bad Metal. I traced both at once, as it appeared that they shared a single PCB.

PXL_20221231_150236846.MP.jpg
PXL_20221231_151241700.jpg

Both units seem to be manufactured same year - 1995 according to dates on potentiometers. I have boxes for both of them, but Bad Metal has a user manual, an Exar products catalog, and even a receipt from the store. It was old in 1997 in Warsaw for 77...

Hi, just reporting a repair on my 2006 MXR Dynacomp (rev E. with CA3080).

Problem was a frying bacon sound. I removed the socketed IC and audioprobed it. The noise was at both pin 2 and 3, so it was before the IC. Noise was also at the base of the first transistor, and up to the positive end of C2 (tantalum capacitor).

I replaced C2 with a good electrolytic, and noise is gone. Easy one, just make sure you add some leaded solder to the RoHS one before desoldering, makes it easier to desolder...

Many kilobytes have been spilled attempting to recreate the legendary Harmonic Percolator, and there are some that enjoy going to great lengths to find just the right transistors to recapture its classic sound. I'm more the type that wants to just shove any old BJTs in there and then jank with the rest of the circuit until it goes BRRRRRR...

I started with the Escobedo Harmonic Jerkulator:

Harmonic_Jerkulator.gif

Tim already did the work of finding sane values for a 2n390x transistor...

At the beginning of my post I would like to welcome you all, this is my first post :)

Now to the point.
I would like to boast about the result of my work. This is an exact copy of the BOSS CE-1 chorus from BOSS
I named it LEGEND :)

The differences between the original include
-possibility to supply with a standard 9V power supply, or BOSS polarization if you prefer
- hardly available analog MN3002 delay line replaced with a newer chip with identical parameters
-reelational preamplifier which,...

Hello all.

I recent spent a Whopping $10 for a UT-300 Ultra Tremolo.

Great sounding tremolo, but does anyone know how to modify it to make the LED flash at the tremolo rate?

Thanks

These TC Electronics pedals from the 1980s are tricky to work on and I'm posting this information for the benefit of all brave souls that take on repair of these iconic FX!

The potentiometer knobs are *NOT* a push fit, so the often-seen advice for using string or ribbon to pull them off will certainly not work.

If you gently remove the blue top by lifting/prising your fingernail or similar blunt instrument, this will reveal a screw which releases the knob. Lift the knob off gently as there's...