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 Post subject: Pot Metal Parts Exploding
PostPosted: Tue Sep 11, 2018 10:55 pm 
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Victor V
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Joined: Sat Nov 19, 2011 12:23 am
Posts: 2164
Location: NW Indiana B-19;VV-IV; VV-VI;VV-XVI; Edison Home B; Amberola 30; Col. BK; Magnola;
Got to love Pot Metal parts! Heard a thud and wondered what it was? Guess what it was a pot metal tone arm laying on my shelf. I had no idea these can nearly explode.

I ventured into radios a little, and found pot metal is no stranger there either, everything from dial drums to speakers.
I think Edison Diamond Disc and early Victor machines seem to be the way to go to avoid pot metal parts.

Has anyone here had any issues with pot metal parts exploding?


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 Post subject: Re: Pot Metal Parts Exploding
PostPosted: Tue Sep 11, 2018 11:21 pm 
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Victor III
Joined: Sat Feb 20, 2010 8:02 pm
Posts: 868
Location: Melbourne, FL
You'll find that a lot of good "Modern" Reproductions of the same parts are made of Steel or even Modern Grade Aircraft Aluminum I have found.

It's just a part of the "sickness" of collecting Antique Phonographs... That's why people don't balk too much at some Modern "Repro" parts made from non-original materials..as long as the other 90% of a machine is original...because it gets the machine going and it's better to have it running than not running..!!! :) ...even though the machine's value might be slight;y affected...

It's pretty normal.

:o)

Tony K.

Edison Collector/Restorer


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 Post subject: Re: Pot Metal Parts Exploding
PostPosted: Thu Sep 13, 2018 6:14 am 
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Victor Jr
Joined: Sat Jan 20, 2018 10:50 am
Posts: 6
Hello,

I'm one of those radio collectors who occasionally deals with pot metal. Here's link to an article from Radiolaguy that discusses the issue with pot metal including a dramatic incident of "exploding" pot metal!

https://www.radiolaguy.com/info/PotMetal.htm

Best regards,

Britt Abbott
Chesapeake, VA


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 Post subject: Re: Pot Metal Parts Exploding
PostPosted: Thu Sep 13, 2018 3:41 pm 
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Victor VI
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Needle Tins are Addictive
Joined: Fri Jul 09, 2010 8:32 pm
Posts: 3516
Location: Belmont, North Carolina
All I know about pot metal is - never heat it up to loosen it up... I heated a piece that was stuck thinking that would get it to move... wrong :? ... I ended up with a pile of stuff that somewhat resembled melted solder. :oops: Lesson learned...
"The phonograph† is not of any commercial value."
Thomas Alva Edison - Comment to his assistant, Samuel Insull.

"No one needs a Victrola XX, a Perfected Graphophone Type G, or whatever you call those noisy things."
My Wife


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 Post subject: Re: Pot Metal Parts Exploding
PostPosted: Thu Sep 13, 2018 9:11 pm 
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Victor II
I've got both kinds of music--classical & rag-time.
Joined: Fri Oct 06, 2017 11:39 am
Posts: 478
Location: South Carolina
Take a can of compressed air, turn that upside down, and shoot the resulting frigid iceblasts out of the can's "straw" onto the affected metal. This shrinks it and it works better than heating. I used this to get the potmetal N reproducer out of the large carriage on my 1911 Model E Standard--we still had to replace it, due to age cracks on the dome and neck, but it came out in one piece!


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 Post subject: Re: Pot Metal Parts Exploding
PostPosted: Sat Sep 15, 2018 3:49 am 
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Victor IV
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Man who ride on tiger find it very difficult to dismount! Charlie Chan
Joined: Thu Jun 28, 2012 12:29 am
Posts: 1469
Location: Temecula, CA
Quote:
I think Edison Diamond Disc and early Victor machines seem to be the way to go to avoid pot metal parts.


In addition to those machines, late Victrola 1929, 8-9 and 8-35 have much better metal in their reproducers than the previous ones after Victor discontinued the brass reproducers. Also Columbia Viva-Tonal machines don't have the pot metal issues that the earlier Columbia Grafonola's have.


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