New stuff in the shop!
Added a few new items to the shop. Urchinspiel is a one-off, there is also some stuff over in the new scratch and dent section that is like, half-price.
Custom
Custom made or custom bent by POTAR
Sound Urchin videos
The Sound Urchin is an electro-acoustic instrument that creates off-kilter sounds, atmospheres, and ambiance based on vibration. The entire instrument acts like a pickup and will amplify just about anything it sits on. It can be plucked, strummed, thumped, and “played” in many ways. You are only limited by your own imagination. What are other … Read more
Stereo phono preamp using JAN 6418 tubes
Here is a nice little stereo phono preamp using a pair of JAN 6418 subminiature tubes. This design uses very few components and adds a nice bit of extra oomph and tube tone sparkle to your input signal. I have tested on turntables and cassette decks with great results. Using an IC7660s as a charge … Read more
Modified DOD FX70 Stereo Flanger
I have had this old DOD Flanger kicking around in my parts box for about 10 years. I finally got around to testing the mods on it, and WOW! It’s a killer. From added LFO tones and noise to delay-like repeats The mods are pretty simple, you replace the 3 internal trim pots with comparable-value … Read more
CV Hex Noiser
Here is a fun little noise project that you can hook up to your Baby 8 Sequencer to get some gnarly sounds. Taking CV (control voltage) from your sequencer or another synth the POTAR CV Hex Noiser creates funky noise beats, bleeps, and squelches in time with your setup. Don’t have a sequencer? No problem, … Read more
Sub Mini Tube Booster with the JAN 6418
Here is a stripboard layout I did for a preamp/boost using the JAN 6418 subminiature tubes I have been experimenting with lately. It is based on the schematic from the previous post, but rather than powering the heater with a 1.25-volt battery, I utilized an LM317 voltage regulator and a 100-ohm resistor. This ultra-simple circuit … Read more
Low Power Vacuum Tube PreAmp
I have wanted to learn more about vacuum tubes for years but was always put off by the extremely deadly power requirements. Working with low power sources for so long, I have blown my fair share of capacitors, which is scary enough for me. Recently I discovered the world of sub-miniature vacuum tubes and the … Read more
Pitch control for cassette players
Figured I might as well post this stripboard layout that I did for the cassette player speed mod. It is based on a drawing from the old Casper Electronics website. Only requires a small piece of stripboard (4×6 ) and 5 components. There are other ways to affect the speed of a tape player motor … Read more
PT2399 Noise Ensemble delay
The Noise Ensemble is an extremely noisy delay that can easily be pushed over the edge into self-oscillation. Based around the PT2399 IC; it has a built-in VCO, 2 op-amps, and 2 low pass filters crammed into a 16-pin dip case! It can get very loud! Check out the datasheet. I have built more than … Read more