Theremin schematic

From the book '103 Simple Transistor Projects' by Tom Kneitel, pp98-99 Published by Rider, 1964

This schematic is based on a post to sci.electronics by jmichael@vnet.ibm.com Schematic graphic by p.j.knight@bradford.ac.uk

All transistors are PNP


    S1
    __   Q1
9V--  --e c-------------------------------.
         b          !                     !
         !      Q2  e---.   \!/       Q3  e---.   \!/
         !              !    ! Ant1           !    ! Ant2
         !    .---b    C1    !      .---b    C2    !
         !    !         !    !      !         !    !
        R1   .-.    c--+++---      .-.    c--+++---
         !   ! !       ! !         ! !       ! !
         !  R2 C5     C3 L1       R3 C6     C4 L2
         !   !_!       !_!         !_!       !_!
         !    !         !           !         !
0V-------+----+---------+-----------+---------'

Q1   2N1097
Q2,3 2N1264

R1     180K
R2-3    51K

C1,2  200pF
C3,4  200pF Trimmer
C5,6 0.01uF

L1,2  vari loopstick

S1     SPST

Connections to the collectors of Q2,3 are made via 5 way binding posts. Antennas are Lafayette F343 whips. Keep leads short. Cut shield connectors off 2N1264's. Place near AM radio Adjust 200pf cap at J1 until hissing noise, then 200pf at J2 for whistle, then back to 200pf at J2 for lowest pitch. Play with hands. Perhaps an ascii artist can draw from the description. Good luck.