<div dir="ltr"><br><div>There is also a book "Ondes Martenot With Tubes" by Thierry Courrier, published by Wiley, with schematics of a tube and a solid state version, but seriously expensive. </div><div><br></div><div>I got to play one briefly many years ago when we were setting up the studio for a Messiaen recording, and it was the most remarkable thing I've ever played, almost alive.. </div><div>The speakers are a massive part of the sound - the palme and diffuseur are quite magical.</div><div><br></div><div> Steve</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 21 Mar 2025 at 02:39, Mike Beauchamp <<a href="mailto:list@mikebeauchamp.com" target="_blank">list@mikebeauchamp.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I'm really happy to share this with the synth-diy community, as these <br>
schematics are something I have been searching the internet for over the <br>
last 14 years.<br>
<br>
<a href="http://ondes.net/" rel="noreferrer" target="_blank">http://ondes.net/</a><br>
<br>
I have been collecting all of the information I can find on the Ondes <br>
Martenot for quite some time. Although there were rumours of people <br>
having copies and one being briefly shown in the film "Wavemakers" <br>
(<a href="https://www.nfb.ca/film/wavemakers/" rel="noreferrer" target="_blank">https://www.nfb.ca/film/wavemakers/</a>), actual schematics seemed totally <br>
unobtainable.<br>
<br>
Several years ago, I reached out to a man named Jean Landry who had been <br>
a repair technician and also worked and taught at the Conservatoire de <br>
musique de Montréal, which as far as I know is the only place that <br>
teaches the Ondes Martenot in North America. During a visit to his <br>
modest repair atelier, he pulled out several original schematics from <br>
his filing cabinet and very kindly offered to scan them for me.<br>
<br>
Once I saw the schematics, of course I started simulating and <br>
breadboarding the oscillator core, waveshapers and mixing circuitry. <br>
After making some improvements to the stability of the oscillator, I <br>
designed the Therevox Ondes VCO for eurorack as a side project during <br>
the development of the ET-5.<br>
<br>
Jean continued to scan and organize more documents he had related to the <br>
Martenot, including original operating manuals, technical bulletins and <br>
everything else he could find. Jean and I are both former guitar amp <br>
repair techs, and we talked about how vintage Fender amplifiers will be <br>
around forever because their schematics were always top-notch and <br>
available. Jean wanted his Ondes Martenot information to be available on <br>
the internet so it might help others repair the few Ondes Martenot <br>
instruments that are left in the world. He did most of the work, I'm <br>
just a guy that knows a bit of html and happy to finally put this stuff <br>
online.<br>
<br>
Mike<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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