PRO2004.9


                     2&3)   400 CHANNEL and SPEED MOD !
       On the top of the sub-circuit board, locate the slot for D-513. Count
backwards from there until you get to the space for D-510. Install a diode
at D-510 in the same polarity as the rest of the diodes. There, you now 
have 400 channels instead of 300 ! Now install a diode at D-514 and you have 
increased the scan speed to 20 channels/sec from 16 ch/sec. Carefully re-
assemble the metal box. Make sure everything else is as it should be.
RE-invert the radio so it is right side up. 
 
                        4)  THE SQUELCH MOD !!
    Now, locate a sub-circuit box under the sloping front panel. It should 
have many alignment holes in the top. Pry the cover off very carefully.
Locate IC-2 in the left side of the pc board. It should be marked IC-
10420. Locate R-148, a 47 K ohm resistor between pins 12 and 13. 
Cut a lead of this resistor, But be sure to leave enough lead on both
sides of the cut to solder to. Patch in a 100K ohm resistor. Make sure
there are no solder balls or short circuits. Now your squelch will operate
more smoothly.      
           
         Again, I STRONGLY suggest you obtain the above mentioned
magazines for more details. Addresses appear below. Please ignore any 
mis-spellings, mis grammer, etc. Good luck and good listening !!!
                                                     73
                                                 Gene WA1UXA

PS, make sure you re-install the metal cover and re-install the radio in the
case !!!!!!!!!!!!!!!!!!


Addresses:     Popular Communications
               76 N Broadway
               Hicksville, NY. 11801
                          
              Monitoring Times
              140 Dog Branch Rd
              P.O. Box 98
              Brasstown, NC. 28902