View source for DD161018

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[[DD161018]] is a page of Delia's handwritten notes for [[Science in the Shadows]].

<BR CLEAR=ALL>
=Transcript=
<PRE>
     Science in the Shadows
     ----------------------

Ring modulator:
                             modulation
       Muirhead   B & K. -- 4/sec, freq
                            range just
         610       850      audible

         305       425

         152&frac12;      212&frac12;

    various[?] at  212&frac12;
        .
        .
        .
     and faded
Switched in RP2 + TR90 f/b + echo
           ^
   rec^d^. on BTR2 at 7&frac12; i.p.s. p/b at 15 i.p.s.
</PRE>
=Notes=
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.

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."

=References=
<references/>

[[Category:Paper]]