Hammond 102100 Analog monophonic synthesizer demo

YouTube via sounddoctorin
"Bob Weigel of Sound Doctorin' demonstrates the Hammond 102100 synthesizer, a rare analog monophonic unit capable of some warm sounds and somewhat flexible through use of an array of preset switches. Sliders for wind (noise), tuning and volume. But 7 buttons each for waveforms (32' square, 32' saw, 16' of the same, 8' of the same, and 4' of a pulsey saw), filter mode, Width (one shots and repeating) and rates for vcf, envelopes for vca, pitch bend envelopes/portamentos, and modulations. Presets are French horn, Tuba, Violin, Sax, Clarinet, and 'space echo'. Cancelling presets leaves one with whatever the button matrix has selected then. Only one button in each row of 7 can be pressed at once. But as you see some useful combinations do come up and it's certainly a useful synth for the studio."

Hammond 102100 analog synthesizer tune up!

"Bob Weigel of Sound Doctorin' ( Http://www.sounddoctorin.com ) runs through the tuneup procedures for the rare Hammond 102100 synthesizer. See also video doing sound demonstrations. These are a monophonic synth with a single vco and divide down square wave arrangement. Then footages are combined to create stepped saw waveforms which may be selected instead of squares from 32' to 4' and run through the VCF and VCA sections with modulations. But controls are limited to sliders for wind (noise) and tuning and volume, and preset buttons for 7 each waveforms, filter modes, sweep rates (repeating and one shot), Envelopes, and modulations. Still there are some very nice combinations and the sound is very warm though noisy base line so far. I may need to replace those electrolytics that measure a little high on esr meter."

Rare Hammond 102100 Analog Synthesizer 1970s SN 391780

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"rare Hammond 102100 analog synthesizer. Ca. 1974
Built in USA
Excellent cosmetic and functional condition
Includes rarely found plexiglass music stand
Similar to Moog Satellite or Arp Soloist with a bit more control

Monophonic synth, all functions operate as presets
7 waveforms: square and sawtooth
7 filter tone shapes, 7 tone modifier shapes
7 ADSR waveforms, pitchbend waveforms and vibrato settings

6 preset voices

Noise (wind) added by slider control"

This one was featured back in February. You can find additional Hammond 102100 posts here.

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Hammond Model 102100 Preset Mono Synthesizer

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"The Hammond Model 102100 Preset Mono Synthesizer is a vintage monophonic analog synthesizer with preset sounds. Known for its iconic design and warm, classic sound, it features a set of pre-programmed patches for quick and easy sound selection. With a compact and portable form factor, it's a favored choice among musicians and synthesizer enthusiasts for creating iconic retro tones reminiscent of the 1970s and 1980s. The Model 102100 is celebrated for its character and simplicity, making it a sought-after collectible in the world of vintage synthesizers.

Sounds weird sometimes, but that may be the sound it's supposed to make."

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Hammond 102100 Synthesizer

via this auction

"Hammond 102100 Monophonic Synthesizer. It was made in the USA around 1974-75. It's been estimated that there are between 40-50 in working order left in the world. It comes with the music stand - which is a brown piece of plexi and also comes with the metal stand that has the Hammond logo on it."

You can find a couple of videos of the 102100 Synthesizer here.

Hammond Vintage Synthesizer 102100 * RARE USA version of 102200 SN 391376

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"Vintage 1970's Hammond 102100 analog mono synthesizer. This is the rare first version of this synth which was made in the USA (later model 102200 was made in Japan).

Unit is in Excellent cosmetic condition. All original and fully intact. Unit powers up / lights up but has not been tested through a sound system. All keys and buttons are lively, sliders are sticky and need lube. One slider tip is loose. Original 2 prong plug end."

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Hammond 102100 Mono Synth Test

YouTube Published on Jul 26, 2012 by Airabrab

"Hammond 102100 for sale. 100% functional. Very very rare. Supposedly only 200 were ever produced, probably less than 50 in working condition. This video just shows me running through all the keys, switching the presets as I go along. There are six presets. French Horn, Tuba, Violin, Sax, Clarinet, Solar Echo. I press each button on the programming matrix and run through that to show that they all work. The matrix has sections for the following functions: Waveform, octave, Filter, Cutoff, Filter Modulation, Envelope, Attack Speed, VCA envelope release, pitch modulation, and vibrato contact delay. Finally I show the wind, volume, and tuning functions work. Each button is numbered, so actually remembering a preset is quite easy. You just write down the 7 digit number of all the buttons that were depressed. Just a super basic demo to assure that everything is working. Thanks!"

Contact: https://www.youtube.com/user/Airabrab

Hammond 102100, Rare Analog Synthesizer

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"Up for auction is a ridiculously rare Hammond 102100 Analog Synthesizer. It is a product of the early 70's and certainly sounds like it, with a huge, thick and powerful sound that only 70's analog synthesizers possess. It is essentially a 1 VCO monosynth with a few presets and a manual (or panel, you could call it) mode where you can customize your patch. There are several footings for saw/square wave, several filter settings, LFO mod of the filter, vibrato, envelopes for both the VCF and VCA, etc. All of the buttons work, as do the keys. It stays in tune extremely well.

It is a bit dirty and is missing the wood side panels. The top of the unit comes off and the various boards can be calibrated/adjusted. It has a 1/4" output on the back of the unit."

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Vintage Hammond USA 102100 Synth

via this auction
"Rare Hammond 102100 Monophonic Synthesizer. Made in the USA 1974/1975. YES HAMMOND MADE A SYNTH! This one of less than 50 working synths in the world. It is estimated that Hammond produced only 200 units. This is a fully functioning, complete with stand and smoked plexi music holder monophonic synthesizer... Little info is out there on these units. From what I have found they were probably made by Ikutaro Kakehashi the creator of The Roland Company and Hammond Japan. In 1976ish Hammond Japan made the 102200. Only around 200 units as well. They look exactly the same. Single 1/4" out. No midi. Neat synth. Nice action for 30+ year old vintage gear."

Rare Vintage Hammond 102100 102200 Synth

via this auction

"Vintage 70's Hammond 102100 Monophonic Synthesizer. Measures 36 inches long , 12 and a half inches wide , 8 inches tall and weighs 35 pounds."

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Hammond 102100 Vintage Analog Mono Synth

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Video at the auction and previously posted here.

"Up for sale is a very rare Hammond 102100. It is a single oscillator analog monophonic synth made in the mid 70's (1974?) by Hammond Japan. It was originally meant to be a preset synth that would sit atop your Hammond organ. Supposedly there were only 200 ever produced, and there are probably less than 50 in working condition. So I would say it is extrememly rare to find one in this condition. It is much like the other early mono preset synths from the same era: Arp Pro Soloist, Moog Minitmoog, Moog Satellite, Roland SH-1000, Korg Micropreset & Minikorg. All great synths, but this may be the hardest to find.

It is100% functional. All keys work perfectly, no messed up key contacts, sliders move easily, no broken buttons. Very very clean/good physical condition. There is a chip to the wood paneling pictured below. Other than that there is barely a scratch on it.

How it works: There are six factory presets. French Horn, Tuba, Violin, Sax, Clarinet, Solar Echo. These are selectable via the buttons on the right. To the left you have a programming matrix, with buttons for all the functions. The matrix has sections for the following functions: Waveform, octave (3 octave keyboard with 6 octave selectable range), Filter (7 filter envelope positions), Cutoff, 3 Filter Modulations, Envelope, Attack Speed, VCA envelope release, pitch modulation, and vibrato contact delay.

Each button is numbered, so actually remembering a preset is quite easy. You just write down the 7 digit number of all the buttons that were depressed.

Final, but important, note: The power supply is European. It reads 230v 50-60khz 20va. I tested the synth with a basic step up transformer and it worked great."

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Vintage and Rare Hammond 102100 Analog Synthesizer SN 391912

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"A rare Hammond 102100 analog synthesizer. Refurbished, in excellent working condition. a couple of the pushbuttons have replaced numerical inserts. All other parts original. Good descriptions of this synthesizer exist on the internet, monophonic. numerous waveforms, and other controls all selected by pushbutton. Some presets as on the Moog satellite. Does not include the plexiglass music stand..."

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Hammond 102100 Analog Synth

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Published on Mar 19, 2020 hckocher

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"Up for bid is a Hammond 102100 Analog Synth. Every key works,every preset works. The volume,tuning and wind sliders work.

Of the 7 button banks, all of them work,electronically speaking, but Tone filters #1,2,5,6 and 7 have to be held down to engage. The springs are properly catching. The same is true of #1-7 of the “Filter rise& fall” speed section.

In total, 12 of the 49 buttons will not stay depressed on their own."

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Rare Hammond 102100 Synthesizer SN 392208

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"Rare Hammond 102100 Synthesizer
Working and complete with stand and smoked plexi music holder.
Rumored to be one of about 20 still working in the world.
This is the more rare "made in USA" version, not the Hammond Japan built 102200 (which I believe is the very same model just rebadged)
The only issue is the first set of patch buttons does not always want to latch and you need to play with them a bit on certain frequencies. They all work though!"

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Adaptation of Hammond 102100 Voltage Controlled Filter

YouTube via abovenyquist — April 29, 2010 — "Project for Spring 2010 "Electronics for Music Synthesis" class at Georgia Tech. See here for more info:

http://users.ece.gatech.edu/~lanterma..."

Adaptation of Moog Rogue Voltage Controlled Filter & Amplifier


Voltage Controlled "Wah" - Multiple Feedback Bandpass Filter, using a Vactrol


Voltage Controlled Phaser, based on OTAs


Four-pole lowpass voltage controlled filter, using vactrols


Adaptation of Hammond 102100 Voltage Controlled Filter


Adaptation of Moog Rogue Voltage Controlled Filter & Amplifier


Voltage Controlled "Wah" - Multiple Feedback Bandpass Filter, using a Vactrol


Voltage Controlled Phaser, based on OTAs


Four-pole lowpass voltage controlled filter, using vactrols


Four-pole highpass voltage controlled filter, based on Polyfusion circuit, part 1


"Tube screamer" style distortion, with voltage-controllable drive, via a vactrol


Adaptation of the voltage controlled filter from the Memorymoog


Vactrol-based voltage controlled amplifiers, in the styles of Buchla and Korg



YouTube via abovenyquist — May 06, 2010 — "Project for Spring 2010 "Electronics for Music Synthesis" class at Georgia Tech. See here for more info:

users.ece.gatech.edu/~lanterma/ems10"

BBD-based flanger, on the breadboard


Buchla 291 bandpass filter circuit, on the breadboard

Hammond Synthesizer 102100 Service Repair Shop Manual

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"A Factory Original OEM Hammond Synthesizer 102100 Service Manual, including Schematics and Parts List."

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Vintage Hammond Analog Synthesizer

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"mid-70's "Hammond Synthesizer" model 102100 Yes, that's right . . those conservative organ folks rolled out a MONOPHONIC 100% Analog Synth back in the day. I suppose they assumed you would park in on top of your B3 . . but few did"

Remember you can search on 102100 on the top left of this site for more.

Vintage Hammond 102100 SN 391515

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Hammond 102100 Analog Monophonic Synthesizer SN 391780

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Hammond 102100 Synthesizer

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Pics of the inside below.

"Good News:

The Filter Section works! This is what makes the synth usable and unique. It sounds amazing, and surprisingly rich for a single oscillator.

All keys work.

All parts are original.

Push buttons of Filter Section work and engage when pressed.

Sliders function.

French Horn, Tuba, Sax, and Clarinet work.

It has been cleaned of foam and years of dust.

Excellent physical condition.

Includes plexiglass music stand.


Bad News:

Solar Echo works intermittently, but with pushing the footage buttons, it will come on. I’ll try to show this in the video.

Violin setting volume is too low to be usable.

Sliders are a little resistant and could probably use a cleaning. I’ll leave that up to the new owner, as I rarely moved them anyway.

Small chunk of wood on the side taken out by the Hammond logo.

A small discolored area on the plastic around the Tuning slider.

Scratch on the metal face plate under the Filter Width section."

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Vintage 1969 Hammond 102100 Synthesizer Keyboard

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