A/DA - Harmony Synthesizer

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
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puppiesonacid
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Post by puppiesonacid »

yeah, here's a wierdo the A/DA Harmony Synthesizer (floor box with 9 knobs + 4 ft-sw)
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Device1-4.pdf
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modman
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Post by modman »

I found this somewhere in thread devoted to another pedal. After half a decade...
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Post by uncleboko »

modman wrote:I found this somewhere in thread devoted to another pedal. After half a decade...
What did you find? :D

Scruffie
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Post by Scruffie »

A write up and review of the Harmony Synth, not as good as the actual schematic but still interesting.

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Dirk_Hendrik
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Post by Dirk_Hendrik »

It may be a good idea to remove that "schematic" tag in the thread title.
Sorry. Plain out of planes.

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Scruffie
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Post by Scruffie »

Got one of these in for repair so here's some gut shots of this illusive unit, although I doubt anyone will be tracing this any time soon!
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Harmony Synth Repair.jpg
Harmony Synth Repair Back.jpg

gght
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Post by gght »

The Great Spagetti Western.

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Dirk_Hendrik
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Post by Dirk_Hendrik »

Thanks! This one has been on my wish list for quite some time!

However;
Could you make the top view again? Preferably outside in daylight without shadow and fully covering the PCB (the right side is missing ;-) )
Sorry. Plain out of planes.

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Post by Scruffie »

I'll do my best, weather permitting :thumbsup

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Post by Dirk_Hendrik »

Here's what I have. Not much. I guess that it's pretty safe to assume there's no more than this floating online. That is, The other stuff on the ADA Harmony Synth that came from ADA depot are some mechanical drawings and a description/instruction of a test fixture for selection of the SAD's. No schems, no layouts, nothing electronic. Therefore I guess the 2 photo's above are the best that has shown up in quite some time.
ADA-Harmony-synthesizer-input-filter-schematic.pdf
(139.03 KiB) Downloaded 35 times
ADA-Harmony-synthesizer-output-filter-schematic.pdf
(150.06 KiB) Downloaded 24 times
ADA-Harmony-synthesizer-wiring-harness.pdf
(141.13 KiB) Downloaded 24 times
Sorry. Plain out of planes.

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Post by rafmax »

In the meantime, waiting for the sun to come back :D
15967753_1901949293371151_1198735249_o-2.jpg

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Post by Dirk_Hendrik »

What an incredible beautiful photo!
Sorry. Plain out of planes.

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Post by Scruffie »

Dirk_Hendrik wrote:What an incredible beautiful photo!
:oops:

I don't think the weather is going to permit me to take photos outside so hopefully Raf's suffices.

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Post by rafmax »

Scruffie wrote:...so hopefully Raf's suffices.
Plus, I won't be able to take more pics right now... The pedal is somewhere in UK :mrgreen:

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