[sdiy] Key spring colors on ARP synths

[Benjamín Velasco]

Excellent! Thanks for sharing

El sáb, 15 feb 2025 a las 13:54, Maarten via Synth-diy (<
synth-diy at synth-diy.org>) escribió:

> I made mine from an old inkjet printer axle, I used a lathe to make the
> axle 6.5mm thick at the end. The cut on the end is about 1.5mm wide and 3mm
> deep.
>
>
> Op 3-2-2025 om 17:50 schreef 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
>> Oficina. +56 2 29254154
>>
>> ________________________________________________________
>> This is the Synth-diy mailing list
>> Submit email to: Synth-diy at synth-diy.org
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>>
>> ________________________________________________________
>> This is the Synth-diy mailing list
>> Submit email to: Synth-diy at synth-diy.org
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>>
> ________________________________________________________
> This is the Synth-diy mailing list
> Submit email to: Synth-diy at synth-diy.org
> View archive at: https://synth-diy.org/pipermail/synth-diy/
> Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org
>


-- 
*Benjamín Velasco Ossandón*
Cel. +56 9 96344468
Casa. +56 2 27162400
Oficina. +56 2 29254154
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