[AMRadio] 78 records and aluminum

Dennis Gilliam dennisgilliam at gmail.com
Thu Jan 21 10:41:18 EST 2010

Those aluminum center discs were not those sold to the public with
artist' content, rather they were the recordable type found in radio
stations and sometimes in home recorders.


On Thu, Jan 21, 2010 at 7:10 AM, CL in NC <mjcal77 at yahoo.com> wrote:
> I have several test circuits I salvaged before they hit the dumpster.  These were built in the late 50's, early 60's.  They were in homebuilt Bud type miniboxes, and the constructor, Fritz, W4NTO said the aluminum came from old records.  They melted the plastic off the disk and a shiny aluminum platter of the perfect minibox thickness remained. The aluminum was high qualtiy and even to this day, the inside of the chassis are as bright as chrome, not one hint of corrosion.  The outsides were painted.
> One of the test units checked the operation of the octal socket crystal ovens, another is a NPN/PNP transistor checker, the third was a phase rotation checker using 3 neon bulbs.  That one got changed into a mobile SWR meter with antenna selector, the other 2 still function perfectly.
> So that old cracked and scatched Caruso 78 might have a gold mine of aluminum under its useless surface.
> Charlie, W4MEC in NC
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