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<body><div>Hi Richard,</div><div><br /></div><div>The time frame you mention works because it's early in the war effort. Later on however, the use of <span>aluminum discs was abandoned due to the need for </span><span>aluminum and the industry went to a glass or steel center. </span></div><div><span><br /></span></div><div><span>To answer another question; Electrical Transcription Discs were widegroove & were recorded at 33-1/3 RPM. They were typically 16" in diameter. The reason for 33-1/3 RPM & the large diameter was to provide as much time as possible. Vitaphone discs were the same format, although some 10" discs were made.</span></div>
<div><br /></div><div>Cheers!</div><div>Corey</div>
<div>------ Original Message ------</div>
<div>From: "Richard L. Hess via ProAudio" <<a href="mailto:proaudio@bach.pgm.com">proaudio@bach.pgm.com</a>></div>
<div>To: <a href="mailto:proaudio@bach.pgm.com">proaudio@bach.pgm.com</a></div>
<div>Sent: 11/4/2021 12:48:51 PM</div>
<div>Subject: Re: [ProAudio] Question for Rich Breen re Aluminum discs</div><div><br /></div>
<div id="x13812004f7344c8"><blockquote cite="f7c49bf1-0ffd-7fd6-13f1-2a28758e916f@richardhess.com" type="cite" class="cite2">
<p>I remember my Dad telling me about setting up some sort of
operation to record onto aluminum discs at CBS Radio in NY City
during WWII. I want to say that they set this up immediately after
1941-12-07. I don't recall what was being recorded, but I think it
was other news feeds both foreign and domestic. He's not around to
clarify anymore.</p>
<p>Regards,</p>
<p>Richard<br />
</p>
<div class="moz-cite-prefix">On 2021-11-04 1:58 p.m., Kevin P.
Mostyn via ProAudio wrote:<br />
</div>
<blockquote type="cite" cite="mid:C5B7388D-1CFD-4979-B64A-19B624EA80F3@mostyn.com" class="cite">
<pre class="moz-quote-pre" wrap="">I have about a 100 of these from 1936 and 1937. All were professionally made in the USA by recording studios. Some are airchecks, some are on-site concert recordings.
Kevin
On Nov 4, 2021, at 10:53 AM, Scott Dorsey <a class="moz-txt-link-rfc2396E" href="mailto:kludge@panix.com"><kludge@panix.com></a> wrote:
Yes.... interestingly I did a google search and it seems that Ecko in the
UK sold a recording device that attached to the speaker output of your home
radio to allow you record programs on an embossed disc quite early on. Is
this possibly it? Not something I see in the US, but the British origin would
make good sense that this is what they'd be talking about.
--scott
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<pre class="moz-signature" cols="72">--
Richard L. Hess email: <a class="moz-txt-link-abbreviated" href="mailto:richard@richardhess.com">richard@richardhess.com</a>
Aurora, Ontario, Canada <a class="moz-txt-link-freetext" href="http://www.richardhess.com/">http://www.richardhess.com/</a>
<a class="moz-txt-link-freetext" href="http://www.richardhess.com/tape/contact.htm">http://www.richardhess.com/tape/contact.htm</a>
Quality tape transfers -- even from hard-to-play tapes.</pre>
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