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 Post subject: Converting a business phonograph?
PostPosted: Jan Mon 15, 2018 12:44 am 
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Joined: Nov Mon 22, 2010 12:05 am
Posts: 747
Location: Denver, CO
I have a model D Edison business phonograph. I would like to modify it to play 4 minute cylinders. It plays great, but is built for 150 tracks/inch, whereas a 4 minute cylinder is 200 tracks/inch. Anyway to change out the feed screw? Thanks,
Dave

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I sell old radios at a loss. But I make up for it with quantity.


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 Post subject: Re: Converting a business phonograph?
PostPosted: Jan Mon 15, 2018 6:27 pm 
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Joined: Jun Sun 15, 2014 11:04 pm
Posts: 909
Location: Coos Bay, Oregon
A feedscrew of the type you describe is unknown to me. However, another way to go is to reduce the speed of the feed screw through a gear reduction system. Numerous gear combinations are available through Boston Gear, Pic, McMaster Karr and others. Good luck with this project, Russie


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 Post subject: Re: Converting a business phonograph?
PostPosted: Jan Tue 23, 2018 1:02 pm 
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Joined: Feb Mon 06, 2012 7:24 pm
Posts: 2381
Location: Gold Country, (Stanislaus National Forest) California 95235
I just paid to have mine turned by a machinist on a lathe.

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 Post subject: Re: Converting a business phonograph?
PostPosted: Jan Tue 23, 2018 11:26 pm 
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Joined: Nov Mon 22, 2010 12:05 am
Posts: 747
Location: Denver, CO
If you don't mind me asking, what is the charge? Thanks,
Dave

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I sell old radios at a loss. But I make up for it with quantity.


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 Post subject: Re: Converting a business phonograph?
PostPosted: Jan Wed 24, 2018 3:49 am 
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Joined: Feb Mon 06, 2012 7:24 pm
Posts: 2381
Location: Gold Country, (Stanislaus National Forest) California 95235
dgonshor wrote:
If you don't mind me asking, what is the charge?
It was a long time ago (several years) and I think the going wage for a machinist back then was around $40/hr - so - maybe $70 including buying the block of aluminum and the engraving tool since those are a per-use deal.

Probably going to be a little higher than that anymore - and then you have to make sure your machinist gets the mount right (I had to diddle with mine a little bit).

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2 kinds of men/tape. Low Noise/Wide Range.
LN=kind. WR=abrasive. Engineers=same thing.


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