R.F.POWERED CW.MONITOR

  Built the simple CW monitor.  This circuit acts as a sidetone for 
  your CW transmitter.  The circuit is powered by the R.F. power
  inducted through the pick-up wire.  The pickup loop should be 
  placed close to open line feedline or wrap a few turns around
  coax feedline.  The pick-up wire should be long enough to cause
  the circuit to sound when the transmitter is keyed.  


                                           | PICK-UP WIRE, place near
                                           |  open feedline or wrap a
                                           |  few turns around coax
                                           |  feedline.
                             Q1            |
                     2N117       ----------*------------------*
                       or     : /          |                  |
                     2N4125   :/           |                  |
      +--------+--------------:            |                  |
      |        |              :<-          |                  |
      \        |              ;  \         |                  |  T1, See Below
  R1  /        |                  \        |  D1=1N34A        |
 68K  \      -----                 \       |                  O ::
      /      /---\ C1               \      |    :             O ::    _  /:
      \        |  .01 mfd            *-----*----:<------------O ::O--: :/ :
      /        |                                :             O ::O--:_:\ :
      \        |                                              O ::       \;
      |        |                                              |
      +--------+----------------------------------------------*


  T1  audio transformer, 12K primary and 4 ohms secondary
      Thordarson 22S48 or any simular audio output transformer.