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 Post subject: Straigtening warped 78s
PostPosted: Sat Mar 31, 2018 12:24 pm 
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Victor O
Joined: Wed Aug 08, 2012 3:34 pm
Posts: 52
Location: Norman, Oklahoma
I found some Victor records that had apparently gotten hot and warped. I would like to try and save some of them. How could I get them to lie flat again? Thanks, Roy


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sat Mar 31, 2018 12:40 pm 
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Victor I
Joined: Fri Jul 28, 2017 6:55 am
Posts: 140
Location: Vienna/Austria
Put the record on a piece of glass and put it in the oven (or outside in direct sunlight during summertime) on a low temperature (ca 200°F ) setting till flat (couple of minutes). Caution, don't "overcook" it.

Jokes aside, its easily done!


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sat Mar 31, 2018 1:44 pm 
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Victor Monarch Special
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Who is John Galt?
Joined: Wed Jan 07, 2009 6:08 pm
Posts: 5231
Location: New York's Finger Lakes
Teak's right - it's easy. I use 2 pieces of 12" x 12" plate glass. A record is placed between the pieces, and put into an oven at 175 degrees F. 200 might work, but I'm a bit of a chicken. Sometimes it takes up to a half-hour at 175, but I've never damaged a record at that temperature.

George P.


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sun Apr 01, 2018 12:19 am 
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Victor II
Joined: Thu May 26, 2016 3:46 pm
Posts: 472
Location: Philadelphia, PA
I use a thick steel plate on top of a pot of boiling water. Not enough temp control on an oven for my liking.
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 Post subject: Re: Straigtening warped 78s
PostPosted: Sun Apr 01, 2018 6:59 am 
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Victor III
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Joined: Thu Jan 08, 2009 6:07 am
Posts: 925
I used the oven method several times for both 78s and even modern LPs. However, with LPs I have to ensure that it won't go over 60 °C, 55 °C to be on the safer side. And 75 °C has always been enough for 78s as well.

For proper control, I use a cheap digital thermometer with an external sensor that goes into the oven. Works great but must not be left unattended while the oven is on. I only use hot air mode which ensures the most even temperature distribution. It takes lots of time to let it cool down but the results have been really good so far.


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sun Apr 01, 2018 10:55 am 
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Victor IV
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Joined: Thu Jan 08, 2009 9:48 pm
Posts: 1196
Location: SF Bay Area, Calif.
I meant to try this technique when it was discussed previously but then forgot about it. Yesterday I took a badly warped 7" Zonophone disc that I display on my Zonophone A and heated it at 175 for 20 minutes. Piece of cake -- it's now perfect, and I love how the turntable pin snaps satisfyingly into place when I turn the disc. ;)


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sun Apr 01, 2018 11:24 am 
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Victor V
His epigrams are all his own, the man's an epigramophone!
Joined: Mon Oct 24, 2011 1:21 pm
Posts: 2054
Location: The Somerset Levels, UK.
I have used the plate glass method successfully, but both the record and the glass must be scrupulously clean. Any dust or debris such as pet hair will become embedded in the record surface when warm and will be impossible to remove when cool.


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sun Apr 01, 2018 9:59 pm 
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Victor Monarch Special
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Who is John Galt?
Joined: Wed Jan 07, 2009 6:08 pm
Posts: 5231
Location: New York's Finger Lakes
TinfoilPhono wrote:
I meant to try this technique when it was discussed previously but then forgot about it. Yesterday I took a badly warped 7" Zonophone disc that I display on my Zonophone A and heated it at 175 for 20 minutes. Piece of cake -- it's now perfect, and I love how the turntable pin snaps satisfyingly into place when I turn the disc. ;)


Glad it worked for you, Rene. I did exactly the same thing in January...a 7 inch Zonophone which was so warped the first half-inch or so couldn't be played. Perfect now!

George P.


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 Post subject: Re: Straigtening warped 78s
PostPosted: Mon Apr 02, 2018 12:50 am 
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Victor IV
Joined: Tue Jan 21, 2014 12:55 am
Posts: 1639
Location: Eugene/ Springfield Oregon USA
phonogfp wrote:
TinfoilPhono wrote:
I meant to try this technique when it was discussed previously but then forgot about it. Yesterday I took a badly warped 7" Zonophone disc that I display on my Zonophone A and heated it at 175 for 20 minutes. Piece of cake -- it's now perfect, and I love how the turntable pin snaps satisfyingly into place when I turn the disc. ;)


Glad it worked for you, Rene. I did exactly the same thing in January...a 7 inch Zonophone which was so warped the first half-inch or so couldn't be played. Perfect now!

George P.


I prefer my records warped. Matches my personality.


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 Post subject: Re: Straigtening warped 78s
PostPosted: Sun Apr 15, 2018 3:06 pm 
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Victor III
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Joined: Wed Jan 07, 2009 3:13 pm
Posts: 598
Location: On Chicago's South Side
Don't try the glass plate-in-oven sandwich on any laminated record -- likely lam cracks will result.
Adam


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