[sdiy] Key spring colors on ARP synths

[Benjamín Velasco]

Thanks for the reply. Good to see I didn't dream that. I'll check those
manuals. Do you happen to have a picture of the one you made that you could
share?

Ben


El lun, 3 de feb de 2025, 13:40, Maarten via Synth-diy <
synth-diy at synth-diy.org> escribió:

> There are several color variants of the springs. If I came across  blue
> and brownish ones. I am not sure if the colors where used for specific
> variants of the keyboards. There are at least two keyboard variants, the
> one with the metal key holders and the one with the completely plastic
> keys. There is a slight difference in length of the springs.  When I take a
> keyboard apart I sort the springs and when assembling the keyboard I start
> with the black keys which is the lowest amount of keys and thus springs.
>
> Yes there was a tool, you can see a part of it in the service manual of
> the Moog Micro and Multimoog service manual. I made one myself and it makes
> aligning keyboards much easier.
>
> Best,
> Maarten
> Op 3-2-2025 om 16:35 schreef Benjamín Velasco via Synth-diy:
>
> Slightly OT.
>
> I think I once read about a specific tool for leveling those Pratt Read
> keyboards that allowed pushing/pulling the bushings posts without having to
> remove the keys. Or did I dream this tool existed?
>
> El dom, 2 feb 2025 a las 20:39, <tamedogs at wildcats.com> escribió:
>
>> I worked there from early 1974 to late 1980.
>> Keyboards came from pratt-read. They came out of the crates, a guy named
>> Gene buffed the keys and into the units they went. I never heard anyone
>> ever
>> talk about spring colors.
>>
>> Dana
>>
>> -----Original Message-----
>> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
>> Terje
>> Winther
>> Sent: Sunday, February 2, 2025 4:36 PM
>> To: David G Dixon via Synth-diy <Synth-diy at synth-diy.org>
>> Subject: [sdiy] Key spring colors on ARP synths
>>
>> Recently I have fixed some old ARP synths. They all needed a really good
>> cleaning of the keyboard. And as you know; you need to remove those key
>> springs to change key bushings and various other fixes.
>> The key springs have two colors; black and (dark) red. Supposedly because
>> of
>> different tensions for the white and black keys, since they have slightly
>> different horizontal travel.
>>
>> But here is where it gets strange:
>> Some of the synths I have fixed used black springs for black keys (sort of
>> easy to remember), while other synths used the red ones for the black
>> keys.
>> So which is correct? Or did ARP change this according to any sort of
>> differences between the various versions of the Axxe and Odyssey etc.?
>>
>> Anyone?
>>
>>
>>
>> Terje Winther
>> terje.winther at wintherstormer.no
>> http://wintherstormer.no/
>>
>>
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>
>
> --
> *Benjamín Velasco Ossandón*
> Cel. +56 9 96344468
> Casa. +56 2 27162400
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>
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