If it would be of any help to hear it or measure it without wow, or simply to get a sense of the w&f profiles of the recorder and reproducer let me know, we'd be happy to do so purely for edification, similar to the Leon Scott Phonoautogram work.
Please pardon the misspellings and occassional insane word substitution I'm on an iPhone
On Apr 15, 2013, at 3:26 PM, David Breneman <[log in to unmask]> wrote:
> From: Mickey Clark <[log in to unmask]>
>> I have a similar record - except the number is 3342-B-4-? a small mark obscures
>> the digit after the 4. It could be a way of establishing whether the governer in
>> the Edison phonograph produced wow. Maybe a pantograph from a mechanical source
>> could have provided the original tone e.g. mechanical in origin -not
> Before the advent of the vacuum-tube oscillator, there were alternators
> designed by Ernst Alexanderson at GE that could produce power in the tens
> of thousands of cycles using a variable-reluctance circuit. They were
> used in early radio transmitters. An alternator producing power in the
> hundreds of cycles could be done even with commutators.