copied from amateur radio packet (by WA2ISE):
 Msg# TSF  Size #Rd Date/Time MsgID        From   To
 11328 BF   1525   0 1127/2109 8374_KJ6EO   KJ6EO  MODS@NYNET
  Sb: Yaesu FRG-7
  PACKET BID: 8374_KJ6EO

  Fellow users of the YAESU FRG-7 communications receiver:

  I have enjoyed the YAESU FRG-7 for many years but I always hated the
  fact that I had to run a seperate LONG WIRE in order to receive a
  full signal on the BROADCAST band (jack BC).  I use a DIPOLE fed by
  coax which I connect into the (SW2) connector which works fine for
  all of the HF bands above the BC band.

  After looking at the schematic the other day, I discovered that I could
  place a 100 Ohm resistor from jack (SW1) to the (BC) jack which provides
  the receiver with an antenna for the BC band.  Thus, you can connect
  your coaxal fed dipole to jack (SW2) add the resistor, and throw away
  the longwire for the (BC) jack.

  73 and HAPPY SWL'ing..............Bill/KJ6EO @ KJ6EO /
  
