Strange Diamond Disc Mystery Record

Curt A · Post by **Curt A** » Fri Dec 12, 2014 8:44 pm

What is this? A one-sided Diamond Disc with the recording of a single tone??? Matrix #3342-B-1-1

52089 · Post by **52089** » Fri Dec 12, 2014 8:47 pm

That would be the "tuning" disc sent to dealers to help regulate the speed of a Diamond Disc machine. This was sent out with a pitch pipe. The dealer would play the record, blow the pipe, and adjust the speed of the record to match the pitch pipe frequency. These don't show up every day.

Curt A · Post by **Curt A** » Fri Dec 12, 2014 9:08 pm

Thanks for the info... how unusual are these?

52089 · Post by **52089** » Fri Dec 12, 2014 9:58 pm

Curt A wrote:Thanks for the info... how unusual are these?

I'd say I see 1-2 a year on ebay - at the most.

estott · Post by **estott** » Sat Dec 13, 2014 10:19 am

Is the pitch indicated so that you can use a standard pitch pipe?

52089 · Post by **52089** » Sat Dec 13, 2014 11:41 am

estott wrote:Is the pitch indicated so that you can use a standard pitch pipe?

The hard-to-find sleeve for the record indicates you should use an "international A Pitch-pipe". I'm not sure what that would be in 1913 - 440? 448?

pictureroll · Post by **pictureroll** » Sat Dec 13, 2014 6:54 pm

Most probably A-435.

52089 · Post by **52089** » Sat Dec 13, 2014 8:24 pm

Apparently this was discussed earlier:

http://forum.talkingmachine.info/viewto ... ing+record

Strange Diamond Disc Mystery Record

Strange Diamond Disc Mystery Record

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