[sdiy] any thoughts on what this part may be?

[Adam Inglis]

More photos please!

What are the relays used for?

AI
> On 17 Mar 2016, at 7:07 am, Travis Thatcher <recompas at gmail.com> wrote:
> 
> Weird! I actually heard back from Allen Organ:
> 
> Travis: Thank you for your inquiry. The item you have circled is an
> LDR. This item has a photo cell on one end and a light bulb on the
> other end. It's used to turn circuits on and off. Most times just the
> bulb goes bad and would need to be replaced. You will need to go to
> the local Allen dealer for replacement items for this assembly. I’ve
> listed the contact information below and copied them on this message.
> Feel free to contact them directly.
> 
> Never would have guessed LDR. Very curious to see if the local branch
> has any, have a call in to them.
> 
> Thanks everyone for the thoughts. I'll take some gut pics of the
> broken one taken apart when I get back to my friend's place. The
> harpsichord is really pretty fascinating - lots of relays and really
> large bundles of brittle, thin wire carrying all the signals. There
> are two large frames, one for the 8' oscillators and one for the 4'
> ones, all are coil based.
> 
> On Wed, Mar 16, 2016 at 5:04 PM, saure <saure at put.as> wrote:
>> Hi,
>> 
>> I posted your image into a vintage radio forum and this is what I got so
>> far.
>> 
>> http://www.vintage-radio.net/forum/showthread.php?t=124760
>> 
>> Hope it helps
>> 
>> -----Original Message-----
>> From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of
>> Travis Thatcher
>> Sent: terça-feira, 15 de Março de 2016 16:34
>> To: Synth DIY
>> Subject: [sdiy] any thoughts on what this part may be?
>> 
>> Helping a good buddy with a really weird, rare old Allen Organ
>> electronic harpsichord. We actually got some schematics and docs from
>> Allen Organ who were intrigued by the weird aftermarket preset
>> controls that someone had built into the thing. Its basically all
>> working except for the 4' strings voice and we've narrowed it down to
>> the following part:
>> 
>> http://recompas.com/hpschd.jpg
>> 
>> Only problem is that I haven't the slightest clue what it is. I'm
>> guessing some sort of capacitor charging solenoid? The working ones do
>> not make any mechanical sound and when we swapped this one with a
>> known working one things operate as expected. I'm stumped!
>> 
>> 
>> 
>> --
>> http://www.travisthatcher.com
>> http://www.soundcloud.com/thevoiceofsaturn
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> 
> 
> 
> -- 
> http://www.travisthatcher.com
> http://www.soundcloud.com/thevoiceofsaturn
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