http://wikidelia.net/index.php?action=history&feed=atom&title=DD161018DD161018 - Revision history2026-05-06T15:40:23ZRevision history for this page on the wikiMediaWiki 1.43.8http://wikidelia.net/index.php?title=DD161018&diff=9204&oldid=prevMartinwguy: /* Notes */2015-01-25T20:57:47Z<p><span class="autocomment">Notes</span></p>
<p><b>New page</b></p><div>{{Thumb|DD161018}}<br />
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[[DD161018]] is a page of Delia's handwritten notes for [[Science in the Shadows]].<br />
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<BR CLEAR=ALL><br />
=Transcript=<br />
<PRE><br />
Science in the Shadows<br />
----------------------<br />
<br />
Ring modulator:<br />
modulation<br />
Muirhead B & K. -- 4/sec, freq<br />
range just<br />
610 850 audible<br />
<br />
305 425<br />
<br />
152&frac12; 212&frac12;<br />
<br />
various[?] at 212&frac12;<br />
.<br />
.<br />
.<br />
and faded<br />
Switched in RP2 + TR90 f/b + echo<br />
^<br />
rec^d^. on BTR2 at 7&frac12; i.p.s. p/b at 15 i.p.s.<br />
</PRE><br />
=Notes=<br />
The [[Muirhead]] is a precision sine wave oscillator, [[B & K]] is a frequency-modulated sine wave oscillator (a.k.a. the [[Wobbulator]]), while the [[TR90]] and [[BTR2]] are tape recorders.<br />
<br />
The last line reads "Recorded on the BTR2 [tape recorder] at seven and a half inches per second and played back at fifteen inches per second."<br />
<br />
=References=<br />
<references/><br />
<br />
[[Category:Paper]]</div>Martinwguy