<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body dir="auto"><div dir="auto">I recall the big one, with thousands of tubes. It was difficult to run a successful computation, because some tube would quit in the middle. </div><div dir="auto">Power down the drawer, replace tube, power up, wait, try again...</div><div dir="auto"><br></div><div dir="auto">In the 60's there was a transition from core memories (cubes of woven magnetic cores) to semiconductor memories.</div><div dir="auto"><br></div><div dir="auto">In the 80's there was some interest in buble memories, but that faded away.</div><div dir="auto"><br></div><div dir="auto">And now we have memory ic shortage...</div><div dir="auto"><br></div><div dir="auto">So here we are. Our modern life style demands a lot more memory then can be supported by the present day supply chain. </div><div dir="auto"><br></div><div dir="auto">Dan Lavry</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div id="composer_signature" dir="auto"><div style="font-size:85%;color:#575757" dir="auto">Sent from Samsung Galaxy smartphone.</div></div><div dir="auto"><br></div><div><br></div><div align="left" dir="auto" style="font-size:100%;color:#000000"><div>-------- Original message --------</div><div>From: Mike Rivers via ProAudio <proaudio@bach.pgm.com> </div><div>Date: 7/5/21 12:21 PM (GMT-08:00) </div><div>To: proaudio@bach.pgm.com </div><div>Subject: Re: [ProAudio] Semiconductor shortage </div><div><br></div></div>
<div class="moz-cite-prefix">On 7/5/2021 3:00 PM, Dan Lavry
<a href="mailto:dan@lavryengineering.com" class="moz-txt-link-rfc2396E"><dan@lavryengineering.com></a> wrote:
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<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">No problem.One can make a flip flop out of a dual triode. So 8 tubes can store a byte.?100Mbyte memory (100 million tubes) will take a little more space, run hot and be a little slower -:)</pre>
</blockquote>
We had a computer like that in college. Took up a whole room. Took a
whole semester to write, debug, and run a program. I'm glad it's
not going to be1960 over again. <br>
<br>
<br>
<pre cols="72" class="moz-signature">--
For a good time call <a href="http://mikeriversaudio.wordpress.com" class="moz-txt-link-freetext">http://mikeriversaudio.wordpress.com</a></pre>
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