Teezer front and back

flickr by sduck409
(click for more)

"This is my version of Ian Fritz's Teezer through zero VCO. Front panel is my design in MOTM format made by Front Panel Express."

Modular Sequencer Rack

via John L Rice

"Top row:
Synthesizers.com Q960

Bottom row from left to right:
Moon Modular 1U blank panel
Synthesizers.com Q130
STG Sea Devils VCF
Moon Modular 2U blank panel
Synthesizers.com Q125
Synthesizers.com Q962
Moon Modular M553
Rack is a 10” deep 10U EWI Tourcase from http://www.audiopile.net/

Vent panels are Middle Atlantic VT series

Custom logo panel from Front Panel Express"

243 Programmable Pulser new panel version

flicrk by verbos (click for more including the inside).

"Here's a shot of the new version of the Programmable Pulser. The panel has also been redone. It is now silk screened, rather than etched by Front Panel Express. It's a bit more hassle, but it looks better I think."

You might recognize this from way back.

Wierd Sound Generator

flickr by sduck409

full size

"This is the front of my Wierd Sound generator, a synth module I built from plan from Musicfromouterspace.com. The panel was my design, done in FPD from Front Panel Express."

MUSIC FROM OUTER SPACE "16-STEP SEQUENCER "

Rotary Format Design by Thomas White. Title link takes you to more shots and info.

"This is an actual Front Panel Express Panel being fit with the parts to complete my layout of the Music From Outer Space Sequencer by Ray Wilson. I wanted to go for the rotary look in the MOTM-Basic format. Of course, you can see the knobs are no where near MOTM spacing, nor are the switches. But, they are switchcraft jacks and flatted bat switches. I am short a few knobs and control switches, but you get the idea of what I am going for. The sequencer features:

* 16 Step Operation With LED Indicator Per Step
* Gate Switches per Step
* Coarse and Fine CV Adjustment
* Built In Oscillator for Sequence Rate with LED Indicator
* Forward and Backward 1-Step Switches
* Reverse Mode
* Random 16-Step Mode
* Play Till End of Sequence Mode (Triggered by Gate or Start Button)
* Gate/Trigger Out Per Step
* Glide
* External Start"

Steiner Synthacon VCF

Peng recently posted a Steiner Synthacon VCF for sale on AH. I asked him if he wanted me to put up a post and if so how long the images and samples would remain on the page. He gave me the go ahead to back everything up and put up a post, so here it is. You can find his contact info if you are interested in picking it up on his page. If the page is gone it's probably sold. Images saved here.

Stiener / Synthacon VCF
Built using a CGS35 pcb and a pcb designed and etched by me. This extra pcb adds an AP input with Wet / Dry control,
Bipolar FM input, and normal / inverting LP, BP, and HP input attenuators
Front Panel Express MOTM size and layout panel
Bourns and Spectrol pots
Sheilded cable for audio inputs

This VCF has a lot of charactor and many faces
Responses range from sweet coloring to extreme distortion
Using the AP input and Dry/Wet knob it can produce phaser-like sounds
Price: $250.00

Controls
FREQ - manual cutoff frequency
RES - Resonance control (sometimes called Emphasis). Turned fully clockwise the filter will oscillate
AP MIX - This control mixes between the Dry signal presented at the AP IN jack and the filtered signal. At the right settings you get phasing sounds.
HP IN, BP IN, and LP IN - controls the level and polarity of the input signal(s).
FM1 - bipolar (level and polarity) control for FM1 signal,
FM2 - level control for FM2 signal.

Inputs and Output
The four audio IN jacks (LP,BP,HP,and AP) can be used simultaneously. A spectral mixer. That is one of a handful of things that make this filter special.
AP IN - the signal presented here is routed to four places after it is buffered: The Dry side of the AP MIX pot, and the normalled lug of the LP, BP, and HP IN jacks.
Plugging into any of these jacks will disconnect the AP IN signal from getting to that input. A huge variety of sounds can be produced by plugging different VCOs into the seperate filter input stages.
LP IN - audio input for LP stage of filter.
BP IN - audio input for BP stage of filter.
HP IN - audio input for HP stage of filter.
1V/OCT - CV input for control of cutoff frequency. Commonly used for keyboard tracking. This is not exactly 1V/OCT! the filter will oscillate with the RES cranked but will not acurately track the keyboard. See the sound sample below.
FM1 IN - CV input for control of cutoff frequency.
FM2 IN - CV input for control of cutoff frequency.
OUT - Final output.

Important Notes
I could have ironed out some more of this filter's quirks, but I find that these quirks contribute a lot to the VCF's charactor.
I wanted to keep it as pure to the original design as possible.
Be forewarned, this design behaves very different than most VCFs you may be familiar with.
There's nothing else like it.

The output signal range is huge. Cranking up the input attenuators and RES level results in a large signal (I measured a little over +/-10V!). At certain mixes of the AP MIX pot and phase reversed input levels, the signal is well below +/-5V (assuming +/-5V input signals are used). You'll have to whip or tame this beast with an external mixer. Most times this is a nonissue since a VCA and/or mixer will commonly follow a VCF in the signal chain.

In the original design, turning the RES control would result in audible scratchiness. Once set the scatchiness disappears but using it a performance control was a no go. This has been improved greatly by adding a cap across the RES pot. Now it can be used while playing but the scatchiness is not completely gone. It is lessened by maybe 90% from how it used to be but, in some cases, can still be detected. This is not from a bad pot (I tried a half dozen different types)! It is a product of the circuit itself. It's nearly a nonissue but still, you should know.

High settings of inputs and RES will lead to unusual and downright unpredictable behavior. Not a bad thing IMO.

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Buchla 100 PCBs

flickr by verbos2002. 

Caption: "My friend Reed has a giant Buchla system. He told me he was interested in a 242 programmable Pulser. That thing uses an EMS style patch matrix to program 3 channels of patterns up to 12 steps long. I suggested that it may be beter for me to design a double wide module that has toggle switches for 6 channels of 16 steps. It is almost finished now. The panel is from Front Panel Express. Reed said he was only interested if I called it the 243 Programmable Pulser and printed "Verbos & Associates Brooklyn, New York" a the bottom, like a Buchla module. I'm making one for him and one for my Buchla."