Amps and effects
Some images from the workbench.
Mounting hardware in a Lady Dirt tube pedal.
The circuit board of the Bull pedal. There’s silicone diodes clipping and in the front of the image you ses two germanium AA144 diodes. There’s three BC184 transistors and one 2N3904. Posted earlier here.
Just had to take this picture. A cap from the 1950:s vs a modern one, same uF and voltage rating.
Here’s a gut shot from the new prototype of the Maestro PS-1A clone.
/Krister
Video and pictures of the V2 zeta-sound clone of the Maestro PS-1A phase shifter.
Mainly changes made in the main circuit board layout , allowing the stompswitches a bit more centered and using onboard in/output jacks. The speed selector circuit works the same as in V1, tap the switch and change the speed through three presets. Blue -> Slow, Green -> Medium, Red -> Fast.
/Krister
This is what’s to be the V2 of the PS-1A clone. It’s got a new main circuit board with onboard in/output jacks.
Here’s the circuit installed in the chassie.
/Krister
Uptated the Modulation page with the Maestro PS-1A
/Krister
Here’s what it looks like with some graphics.
I’ve fixed one issue with the speed preset switch, it could sometimes skip one of the three speeds, jumping from slow to fast skipping medium. It now goes steady from slow (1Hz) -> medium (2Hz) -> fast (7Hz).
I’ve made the depth trimmer available from the bottom lid and added a trimmer for the fast speed as my client requested, adjustable 3- 7Hz.
So lets try to list what differs from the original.
/Krister
Soundclips of my PS-1A clone
/Krister
Got the pedal up and running. Doing some tweaking to the circuit calibrating the trimmers. Sounds good! I’ll try to get some soundclips up.
Gutshot
/Krister
Had the circuit board fabricated for the PSU and the presets controller populated.
Testing the presets controller.
/Krister
This project got forgotten for many reasons, earlier posts can be found here and here. Had a look at the project files for the schematic and the layout. I had some changes made to the schematic, mostly around the PSU and the speed presets. I’ve decided to go for a single stompswitch to navigate through the three speeds in the LFO.
A picture of the layout Im gonna go with.
/Krister