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 Post subject: Restoring a HMV reproducer. Not always bigger is better!
PostPosted: Thu Jul 05, 2018 6:03 am 
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Victor I
Joined: Wed Jul 30, 2014 9:34 am
Posts: 159
Location: Spain
Hi,

Yesterday during lunch time I managed to do a quick repair on a friends reproducer.

As found, it had THAT needle screw and believe it or not it had the thread stripped.
Attachment:
20180704_170100.jpg
20180704_170100.jpg [ 1.37 MiB | Viewed 257 times ]

So I had two options, or go one step bigger... or repair it. :D
Attachment:
IMG-20180704-WA0005.jpeg
IMG-20180704-WA0005.jpeg [ 392.19 KiB | Viewed 257 times ]

To repair it, its important to fill the hole cavern with the same kind of metal. In this case a brass thumb screw I had around was used.
Attachment:
20180704_170209.jpg
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Attachment:
20180704_170435.jpg
20180704_170435.jpg [ 978.08 KiB | Viewed 257 times ]

Then it was sawn and filed flush.
Attachment:
20180704_170920.jpg
20180704_170920.jpg [ 2.23 MiB | Viewed 257 times ]

To make the fix stronger, a small drop of flux and tin was needed.
Attachment:
20180704_172414.jpg
20180704_172414.jpg [ 1.34 MiB | Viewed 257 times ]

Once heated, it fills the gap by capillarity. After filing the tin the repair is invisible.
Attachment:
20180704_173311.jpg
20180704_173311.jpg [ 1.98 MiB | Viewed 257 times ]

The owner wanted a long screw and be able to use soft tone needles (thin needles). This reproducer had a triangular needle hole for bamboo needles so I displaced the screw hole a tiiiiiny bit to the left to allow the screw to reach the corner properly.
Attachment:
IMG-20180704-WA0014.jpeg
IMG-20180704-WA0014.jpeg [ 358.41 KiB | Viewed 257 times ]

Attachment:
IMG-20180704-WA0019.jpeg
IMG-20180704-WA0019.jpeg [ 554.17 KiB | Viewed 257 times ]

Then the needle screw hole was tapped and a subtle touch with diluted paint made the repair to blend with the patina.
Attachment:
20180704_175136.jpg
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Attachment:
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And voila! Ready for another 100 years.
Attachment:
20180704_180115.jpg
20180704_180115.jpg [ 1.14 MiB | Viewed 257 times ]


Regards,

Pedro Martínez.


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 Post subject: Re: Restoring a HMV reproducer. Not always bigger is better!
PostPosted: Thu Jul 05, 2018 9:08 am 
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Victor IV
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"Did you ever stop to think that pleasure is a duty?" (Victor sales pamphlet)
Joined: Thu Jan 08, 2009 5:19 pm
Posts: 1274
Beautiful work!
Thanks for the detailed photos!
I wish I had such fine skill as yours!
Bob
"Comparison is the thief of joy" Theodore Roosevelt


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 Post subject: Re: Restoring a HMV reproducer. Not always bigger is better!
PostPosted: Fri Jul 06, 2018 1:01 pm 
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Victor III
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I'm Getting Ready for my Mother In Law
Joined: Sat Feb 28, 2009 1:52 pm
Posts: 733
Location: the Adirondacks
WELL DONE! BRAVO!!!!!! These are some of the most gratifying repairs out there.....fixing someone else’s “enthusiastic” repair.
-Antique Phonograph Reproducer Restorer-
http://www.EdisonDiamondDisc.com
Taming Orthophonics Daily!


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