Lady Dirt in stereo

Some pictures from the work bench.

High voltage tube pedal Lady Dirt
Lady Dirt times two.

I like how the circuit board appears in black and white.

High voltage tube pedal Lady Dirt Circuit board
Lady Dirt tube sockets and pots side of the circuit board.
High voltage tube pedal Lady Dirt Circuit board
Lady Dirt component side.

And a gut shot.

High voltage tube pedal Lady Dirt guts
Lady Dirt guts.

/Krister

Boss DD-3 repair

Got a Boss DD-3 on the workbench.

Boss DD-3 repair
The Boss DD-3 pedal

Got some problem with the pots I was told. Nice and clean on the solder side of the circuit board.

Boss DD-3 repair
Solder side of the circuit board

Here’s a picture of the component side.

Boss DD-3 repair. circuit board
Boss DD-3 circuit board

When played it seems the select knob has trouble changing from 200mS to the 800mS setting.

/Krister

New pedal under design.

Working on a new Zeta-Sound design. I’m in the tryout of a new idea. Right now the circuit is undergoing some testing and tweaking of component values. Making it sound as I imagined it would. We’ll see what comes out of it. Stay tuned for more info.

effect pedal prototyping
Circuit board fitted in a Hammond 1590B enclousure
effect pedal prototyping
Circuit board populated.

/Krister

ProCo Rats repair

Got two Rats of different generations on the bench for repair. The v2 to the left, not working at all. The other one did not reach unity gain.

ProCo Rat
ProCo Rats
ProCo Rat
ProCo Rats guts

I had to replace a malfunctioning jfet source follower on the output stage on the old Rat.

ProCo Rat
Non working jfet transistor

The other one had already been messed with. There were several copper traces on the circuit board that had to be mended, the opamp was burnt and wires not connected. Managed to bring it back to life again.

ProCo Rat
ProCo Rat V2

/Krister

Lady Dirt

Finally had some time to mount the hardware in my new tube pedal design, Lady Dirt. Strange how every build sounds so much better boxed up with some nice graphics.

High voltage tube pedal Lady Dirt
High voltage tube pedal Lady Dirt
High voltage tube pedal Lady Dirt
High voltage tube pedal Lady Dirt
High voltage tube pedal Lady Dirt
High voltage tube pedal Lady Dirt
High voltage tube pedal Lady Dirt

Earlier posts post1 post2 post3

/Krister

Morley Bad Horsie VAI-1 repair

Got this one in for repair

Morley Bad Horsie VAI-1
Morley Bad Horsie VAI-1

Led would not lit at and it did not pass any sound. Opened it up and took some voltage readings. It did not get any coltage due to a bad battery clip.

Morley Bad Horsie VAI-1
Morley Bad Horsie VAI-1 circuit board

After replacing the battery clip it powered up but the led L1 would not lit. Turns out the led was damaged. Had it replaced and adjusted so the circuit would go into bypass mode when the foot is of.

Morley Bad Horsie VAI-1
Morley Bad Horsie VAI-1 L1 replaced

I like the way that the bypass circuitry is built. Never seen a led/ldr combo used with a hex inverter to control the switching fets, works fine on a wah pedal.

Also fixed some new screws for the bottom lid, the old ones where missing.

/Krister