EMS Synthi A "Portabella" by Pin Electronics Germany

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"If you know you know , Midi , and Random Voltage Generator from the Synthi 100 onboard...
This unit was Pin's number 1 , the first made . Delivered to us by PIN on tour in Berlin 2018 , used on the Roger Waters Us and Them Tour lightly , then packed away . Unit is Flawless. Avoid the wait time , get your hands on this amazing piece of machinery today, ships from LA..FREE SHIPPING in the USA"

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Enjoy Electronics Reminder - MULTI FX for synths EXPLAINED @ SOUNDMIT

Published on Nov 2, 2019 BoBeats

"Reminder is a multi-fx unit which is surprisingly fun!

Check out Enjoy Electronics: https://www.enjoy-lab.com/
Check out Soundmit: http://www.soundmit.com

If you want to support my work check out http://www.patreon.com/bobeats

#FX #Delay #Bobeats"

Note this is the first Enjoy Electronics post on the site. The following are some videos and details from Enjoy Electronics.



Playlist:
RemindeЯ in Action
Double Pulse Delay in action!
Enjoy Electronics @ Bridge 48 - RemindeЯ
REmindEЯ - Working Modes
REmindEЯ - The magic wood of sound effects (Official spot)
REmindEЯ in action!
REmindEЯ in Action on MOOG DFAM

Details:

Multi-effect audio Processor

Comprehensive, all in one solution for intricate rhythms Echo space and width.

Direct and immediate access to all the parameters with dedicated knobs.

True-stereo indipendent delay allowing you to create complex rhythmic patterns.

Reverbs with Size and Resonance High-Pass filter - knob.

Double (Chamberlin) Filter with 12 dB/octave roll-off, adjustable resonance

4 Waveform Sync-able LFO

A full, four-channel (quadraphonic) system will reproduce the Left Front, Left Back, Right Front, and Right Back audio signals in each of four separate speakers.

Assignable Foot Switch

Tap Tempo

Intuitive OLED Display

Low latency USB Audio

USB or 5-pin MIDI interface

New μBraids SE Eurorack voltage-controlled digital oscillator/sound source in 8HP by Tall Dog Electronics

We have a new maker and a new module to the site. Tall Dog Electronics and the µBraids SE.

"µBraids SE is a voltage-controlled digital oscillator/sound source in 8HP with a wide range of creative and useful sound generation algorithms (aka models).

This redesigned µBraids SE (Special Edition) is a new revision of µBraids that updates and simplifies the component layout and has a new panel design. It utilizes a custom miniature segmented LED module, eliminating the need for a 2nd microprocessor and its supporting circuitry. µBraids SE remains fully compatible with future upstream Braids firmware upgrades and any other alternate firmwares that are compliant with the standard Braids design.


This module is available from: Control / Analoguehaven / Perfect Circuit / Synthcube with more to come.

Included Parts
µBraids SE includes a standard 16-pin to 10-pin Eurorack power cable and two sets of mounting screws for racks/enclosures with either M2.5 or M3 threads.

History
The original Braids was designed by Olivier Gillet of Mutable Instruments under a CC BY-SA 3.0 license. Braids is a macro-oscillator with multiple intricate digital synthesis algorithms. Each algorithm is controlled by two continuously variable parameters, both of which are voltage controllable. It is available as a 16HP Eurorack module. (Source)

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Sequential Circuits MultiTrak Battery Leak Fix

Update: The original site appears to be gone. The following is from the Internet Archives WayBackMachine. Unfortunately the additional images referred to further below are gone, however you can make out the mod (albeit blurry) to the left. Update: pics added below.

"SCI MultiTrak (Model 615) battery drain fix

So you found this page. Maybe intentionally, as you don't like the lifetime of your backup battery of your MultiTrak, or just by browsing. Anyway - if you have problems with your backup battery only keeping up power for several months, you may want to modify your synth a bit. I found this fix today, when i searched the last problem of my MultiTrak after the monster repair i initially did on this synth. After the repair, i had a temporary battery in it, a button cell 3V lithium battery. It took about 3 months to drain the power from this battery. Even after the second one, after 3 months, end of lifetime. So i purchased the large cell this synth usually needs, but as i didn't feel very comfortable with this very short lifetime, i didn't put it into the synth. Until today, where i wanted to track down this problem and find a solution, if there is any. And i did.

For i impatient and the ones not interested in the technical description of this problem, just the following show modification is needed to fix the problem.
Modifying the MultiTrak

In fact, my MultiTrak had a design bug, which lead to the short lifetime of the battery. If you want to fix this, disassemble your MultiTrak (i don't describe the procedure here, you can find out yourself or somewhere else i think), remove the keyboard cable and put the electronics assembly in front of you, with the connectors away from you. Remove the voice board (the upper board of the stack of 2 large boards) to reveal the CPU board. Near the keyboard connector, you see a large 40 pin chip, which is the keyboard processor, and right of the keyboard connector, you find a CD4022 (maybe it has other letters, but it must have the number 4022 on it). Left of this chip, there are 2 resistors of 10KOhms. The left one (more away from the 4022) is the one we neeed to touch. Desolder the pin of the left resistor which is nearer to you (goes to a thick trace, which connects it with its neighbour resistor), you can also cut it, but we need to connect it elsewhere, so be careful when cutting it. Next, isolate the board and maybe the neighbour resistor, that your modification can't touch something it shouldn't. Now connect the resistors open end to pin 16 of the 4022. That's it. Maybe you want to fix everything with some hot melt glue or another piece of isolation tape. Of just use a piece of wire stiff enough to keep everything in place.

Have a look at the photo (sorry, it is very blurred, i seem not to be capable to do those near-shots in a better quality :) to see how it has to look.

If you are not interested on what you did in detail, you are done now and may reassemble your MultiTrak. Otherwise, read on.
What happens in this modification?

If you want to know, you may want to first measure the current flowing through the battery. On my synth, it was around 200µA. After the modification, it is around 1µA:

So why that? Let's have a look at the schematics:

(Strange. This near shot worked...) You see the 4022 here. As you can see, it gets power from Vnv, the non-volatile power. Besides this, what you can't see here, the RST pin is pulled high by the same signal turning off the RAM access when the main power goes away. Read the datasheet. Pulling RST of the 4022 high sets CARRY and Q0 high. For Q0 this doesn't matter if you don't hit any keys on the keyboard. And even if you would, it should make no trouble, as the CARRY signal also doesn't leak to the keaboard scanner (partially left in the photo). But there is a completely different problem. The 10KOhms resistor used as pullup for the CARRY signal is connected to +5Vd, which is the main power for all other electronics. So you have a high signal on CARRY. A signal of maybe 2,5V. This goes over the resistor, at the other end (the +5Vd) around 0,5V are left from this power. Use your calculator - 2,5V - 0,5V = 2,0V. Using Ohm's law, R = U / I, you get I = U / R, 2,0V / 10KOhm = 0,2mA = 200µA. Quite a lot. If your battery has 1000mAh, you need 5000 hours to drain the battery. 24 Hours per day (assuming you don't turn it on all the time) = 208,3 days and your battery is gone. After the modification, the NV circuits draw 1µA from the battery according to my multimeter. That's 1 million hours then, which again is 41,7 years. No, don't think "i never have to replace this battery again" - lithium batteries have a lifetime of about 10 years, so it's not the synth drawing the power, it's the battery itself, which leads to you replacing the battery after some years again. Maybe 5, maybe 10 - but not one year, as it might be the case until now."

Update: pics via the comments, via Deep Signal Studios:

Circuit-Bent Alesis HR-16 Drum Machines

via this auction and this auction
Top: "This modified Alesis HR-16 features a custom designed Matrix Patching Grid from Diabolical Devices. A single LED patch pin connects bending points which will generate a wide variety of effects and glitches ranging from distorted, filtered and modulated effects to bizarre sounds and warped drum loops. The patch pins have LEDs that will react to ROM data and put on a light show. We have also incorporated a Master Pitch/Clock Rate Control with bypass switch and LED indicator. These are great machines and the HR-16 is loaded with original features. The modification unleashes the evil monster that has been hiding inside since the 80's.
Diabolical Devices aka Class A Electronics, LLC is a leader in Professionally Modified Synthesizer and Audio Equipment, Expert Repair Services, and has a full line of Hand-Wired Tubes Amplifiers and Effects (Diabolical Amplification). Their work has been featured at NAMM, art galleries, music videos, countless tech blogs, and used by musicians all over the world, professionals and enthusiasts alike. The circuit-bending and synth mods are the work of head-technician James Gramling who has spent the last 12 years in professional audio service and electronics prototyping. Check out the new www.circuit-bent.com for updated specs, custom work questions, and new releases from Diabolical Devices

Diabolical Modified Alesis HR-16 Features:
35 point Matrix Patching Grid Triggers Glitches and Effects
Master Pitch/Clock Speed Control with Int/Ext Clock switch and LED
Blue LED Color Change"

video previously posted here

Bottom: "Version B of the Diabolical Modified Alesis HR-16 features a very simple circuit-bending interface and master Pitch/Clock modification. ROM bending is accomplished using 12 position rotary switch, position 1 is off, 2-12 are a variety off odd reactions from bit-reduction, modulation, filtered sounds, to holding and staccato effects. The Pitch Modification is the same as Version 1.
Diabolical Devices aka Class A Electronics, LLC is a leader in Professionally Modified Synthesizer and Audio Equipment, Expert Repair Services, and has a full line of Hand-Wired Tubes Amplifiers and Effects (Diabolical Amplification). Their work has been featured at NAMM, art galleries, music videos, countless tech blogs, and used by musicians all over the world, professionals and enthusiasts alike. The circuit-bending and synth mods are the work of head-technician James Gramling who has spent the last 12 years in professional audio service and electronics prototyping. Check out the new www.circuit-bent.com for updated specs, custom work questions, and new releases from Diabolical Devices

Diabolical Modified Alesis HR-16 (Version 2) Features:
12 position Rotary Switch Circuit-Bending
Master Pitch/Clock Speed Control With Int/Ext switch and status LED"

The HORNET - New EDP WASP / EMS SYNTHI Crossbreed Hardware Synthesizer

"What is the Hornet?
It's a handmade classical portable modular synthesizer with subtractive / FM analogue synthesis.

PCB design by Derek Revell.

Features
3x OCS's, switchable from hi to lo (OSC). OSC 2 with sync switch and depth pot.
1x VCF (18/24 dB)
1x Envelope Generator with inverter switch.
Ghielmetti matrix: 20 x 20 signal distributor with black panel (Sealectro look) and 16 pins.
Midi interface.
CV / Gate interface: in and outputs.
Sample & hold module
Digital frequency meter: Range 20-20000Hz.
Removable 12V BNC lamp.
Symmetrical outputs.
XY axis joystick.
Noise generator.
Spring reverb.
Suitcase with removable lid.
Additional modifications on request.

How to order?
Your Hornet will be made to order, so it is essential that we schedule its production as soon as possible.

Once your order has been placed and payment received, we'll start the production process.

4999€ net. Price does not include shipping and customs duty.

We are having a waiting list! Please send an email to pin@thesynthi.de if you are interested in purchasing/pre-order a Hornet synthesizer."

http://www.hornet-modular.de

Note this is the first Pin Electronics and Ramcur post.

PIN Portabella ‘69 special ltd. collector’s edition simple self-playing patch

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A post shared by Pin Electronics (@pinelectronics)

https://pinelectronics.com/

EMS SYNTHI AKS

via this Vemia aution
You can find videos of this unit here.
"One of the most historically interesting synths we've ever had in the auction: a very very early AKS, one of the three owned and used by Zorch, who recorded at Peter Zinovieff's Putney studio. Like Dr Zinovieff's own Synthi, this has no Spartanite case. It was manufactured in December 1972 - and bought in early 1973; and bearing in mind the age and provenance, it's quite likely it never HAD a case. It is being sold on behalf of Avi Nisim, of the psychedelic-trance duo Astral Projection. It has some excellent original mods. It is sold as is, with any faults as described or un-noticed, and although it is great as it is, it could be even better serviced by one of the EMS tech experts like Lucidsound, or Robin Wood himself. You will need to change the mains plug to the correct one for your country, and if necessary switch the voltage. PLEASE BE AWARE THAT IT IS LIKELY TO ATTRACT TAX AND/OR EXCISE DUTY WHEN IMPORTED TO YOUR COUNTRY. Here are some extracts from the very thorough description from the seller - which you can see in full, with good resolution pictures and video, at http://noisedesign.blogspot.com/2010/03/ems-synthi-aks-for-sale-daylight_20.html This is an early model, white front panel 'EMS Synthi AKS' with a prestopatch bay, produced in december 1972 (acording to it's serial number 4658ks and confirmed by robin wood from EMS) . currently the synth belongs to avi nisim, a member of the psychedelic-trance duo 'astral projection' based in israel. http://en.wikipedia.org/wiki/Astral_Projection_(group) astral projection works together since 1989 and considered to be one of the first psy-trance groups in the world. while checking the front pannel i found a little logo sticker ,which later was recognized with the group 'zorch' http://en.wikipedia.org/wiki/zorch who were pioneers in the british synth music, as britain first 'all synths' group. zorch were the only band ever recorded in peter zinovieff's EMS studio in putney. this synthi confirms as one of the 3 synthi's that were used by the group during the early 70's. this specific one was howard scarr's personal synthi . cosmetics: considering the synth almost 40 years, and it's history, this synthi looks quite good. some scruffs and marks on the sides and on the front panel, some marks on some knobs caps, some of the matrix pins needs a replacement (still available at EMS) . but the overall condition is good, i would say at least 8 out of 10. electronics: DC power rails were checked and they both at -9v and +12v exactly as they should. power lines are clean and steady. no humming through the synth's outputs. some scratchy knobs ,and one broken (output off) switch lever. all the 3 circuits boards and connections looks clean and the parts looks original. the 3 circuit boards havn't been removed during the check. however, i would guess that it's time to service the synthi, replace/clean some of the knobs, replace some capacitors, fine tuning etc. quite a normal procedure for this equipment at this point. the synthi has some mod's which includes: center zero trapezoid, wave shapers, filter hi/ low, osc 3 frequency switch, and more. the synth functions has been tested (although it's quite impossible to test the endless possibilities and each of every matrix pin hole of that beast...) but i can say that all oscillators, noise source, VCA, filter, ring modulator, reverb, mic input's , outputs, envelope shaper, trapezoid, the meter, the internal speakers and the joystick are all working fine, and everything sounds great and beefy. the keyboard sequencer is faulty and partially works, it has some cracks and missing some parts on the upper case (see detailed pictures). with the right patch on the matrix, keyboard touch pads are responsive to touch and triggers sounds. the random pad is responsive as well and it triggers some random notes whan touched. but the sequencer doesn't work. all the mod's that i mentioned above are working and has effect on the sound. the keyboard control and keyboard inverter mod's needs a certain matrix patches (as seen on the stickers on the matrix) which i'm not familiar with, so i'm not quite sure how these mod's supposed to work. it is also impossible to test these mod's without a fully functional keyboard. during the last 20 years , this synthi was installed in a custom wooden rack ,in astral projection's studio, and it does'nt have the spartanite briefcase. update: the 'inverter pin' mod was tested as well, with the kind directions from Mr. Howard Scarr himself. this mod is fully functional and quite amazing. the pin acts like a normal pin , but it actually inverts the signal of where it's positioned (the frequency is controlled by the inverter blue knob), so for example you can output the normal output of osc.3 and at the same time output the filtered- inverted signal of the same osc.3. this opens a whole new world of sounds and possibilities... pure fun! please note: the synthi was throughly tested for more then 10 hours, and as far as i know (i own one Synthi Aks myself) it's in a good working order, and physical shape, however, this is quite an old piece of gear and it will be sold as is, no returns and no refunds. a great care will be taken when packing and handling/shipping the synthi, and it will be fully insured. i did my best to describe the synthi as accurate as possible, for more info, please contact: ofiroman@gmail.com some videos http://noisedesign.blogspot.com/2010/03/ems-synthi-aks-for-sale-some-videos.html"

Manufacturers and More

The following is a repository of banners that have been featured on the site. Note the date of this post is 2009, so some of these banners are old and some sites may be gone. This page exists more for historical purposes.

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300px banners: