Sept. 9, 2002 RadioAnarchy RadioAnarchy RadioAnarchy radio radio Radio Anarchy anarchy anarchy transmitter schematic schematic shortwave shortwave
RADIO   ANARCHY

The Parts List for the Shortwave Transmitter:

(update 02/26/02 - a snubber network needs to be put on the
  primary side of T2.   Check back soon for details.   A 100 ohm
  resistor in series with a 100 PF capacitor should work.)

  • R1 - 33K ohms, ¼ watt, carbon.
  • R2 - 4.7K
  • R3, R6 - 100
  • R4 - 10
  • R5 - 100, 1 watt, or greater.
  • C1 - 47 to 470pF, or greater, silver mica or disc ceramic.
    Better yet, a trimmer capacitor, to slightly change
    frequency ±1 KHZ.
  • C2 - 10 to 140 pF trimmer.
  • C3 - 100 to 220 pF, silver mica or disc ceramic.
  • C4 - .01 to .05 µF.
  • C5 - 300 - 800 pF, or (? ? ?) variable capacitor.   I used an
    Arco TC-4610 (260-900 pF) compression trimmer.
  • C6 - .01 to .1 µF.
  • C7 - 1000 µF or greater, electrolytic, 25 volts or greater.
  • X1 - Fundamental mode crystal, 5 to 8 MHz.
  • T1 - On an Amidon T50-2 toroid core, primary is 26 turns of
    #28 magnet wire closewound, secondary is 2 turns
    wound over the primary windings.
  • T2 - On an Amidon T50-2 toroid core, bifilar wind 6 to 8 turns
    of #18 magnet wire.   See note 1 for details.
  • L1 - 2 mH or greater, .5 ohm or less resistance.   I used the
    inductor from Radio Shack p/n 270-0030A HD Noise Filter.
    One could also use the 4 or 8 ohm secondary of a medium
    sized audio transformer, or the secondary side (6 to 24 volts)
    of an AC mains power transformer.
  • L2 - .7 µH.   Wind 7 turns of #16 magnet wire on a 5/8 inch
    diameter form, then remove form.
  • L3 - 1.4 µH.   Wind 11 turns of #16 magnet wire on a 5/8 inch
    diameter form, then remove form.
  • Q1 - 2N2222
  • Q2 - 2N2907
  • Q3 - IRF510 or IRF511 (Radio Shack p/n 276-2072A)

Grenade audio section modification: