MOTM Buchla Lowpass Gate

via this auction

More pics below.

"2U MOTM format Buchla 292c Lowpass Gate clone. This module is built with all of the options, which include:
Resonance
Deep Mod for low frequency range
3 input Audio Mixer
3 input CV mixer
CV Inverted out
VCA, VCF and Both modes

This module can be used as a lowpass filter, a VCA, a mixer, signal inverter, and self oscillates. This is also one of the few ways to get the characteristic vactrol sound in the MOTM format without trying to get your hands on the Cyndustries Lowpass gate module. A workhorse in 2U space.

The Module is built with the PCB mounted parallel to the panel with a depth under 2” behind the panel making it suitable for shallow racking for portable rigs. Auction includes module only as seen." Two videos linked in the auction below. Both previously posted.


YouTube via attorks | June 01, 2009

"This is a short demo of the Resonant LoPass Gate which is a clone of the famous Buchla 292c LoPass Gate. Thomas White is the one who made this possible by producing the schematics and the PCB. The PCB with components already on it I got 2nd hand from someone in Belgium. The two Vactrols on it are VTL5C6, which are the fast type. I added the components for the mixer section and got the panel, pots and knobs from The BrideChamber.
In this demo the patching is as follows:
On the LPG audio input 1 is a DotCom VCO with a triangle wave.
On the LPG audio input 2 is another DotCom VCO with a triangle wave.
On the LPG Control input is the Gate of the Doepfer MAQ16/3 sequencer. You can see me adjusting the length of the gate with the knobs on the MAQ16/3. The CV of the MAQ16/3 is going to the VCO's.
On the LPG CV 1 input is the output of a DotCom Envelope Generator (settings A-0, D-4.5, S-0, R-2). So when turning the CV 1 knob up, the output of the EG is mixed with the Gate signal. Initially the CV 1 knob is down.
The LPG's output goes to the AKAI Head Rush E2 which is switched on after a while during the music bit.
I couldn't help to put a little music in the middle of this video, hope you don't mind.
The resonance in the Frequency mode is quiet strong but I wanted to show the full turn; perhaps you will hear some clipping."


djthomaswhite | October 05, 2008

"Here is the second of 2 new videos of my Buchla 292c Lopass Gate clone project. These PCB's will be available on a limited run through the www.electro-music.com forum. Check it out if you are interested or catch my at my Youtube mail here for more details. Thanks for stopping by!"