CYBERNET

From: VK3KAY@VK3IBM.VIC.AUS.OC

hello all
here is the mod for taking 11 metre cybernet radios to 6 m
as i have been asked by many people for it
so here it is:

                      Pearce Simpson Model A18
                         Conversion to 6M SSB
                         by  VK4FXX / VK4ZGF
  -----------------------------------------------------------------------------

  Here is 6M mod for Pearce Simpson super panther and other brands using the
  Cybenet type circuit board. ( Digital channell readout prefered )

  ******   Ensure CB is working correctly before starting mods  ******

  Replace X1 Xtal with one of the following of your choice....

  10.97625 Mhz .................. Band 52.050 - 52.480   for 40 ch switch
  10.15175 Mhz .................. Band 50.020 - 50.240   for 40 ch switch

  Band 52.050 - 52.480 / 10Khz channel spacing ....

  Xtal freq =       ( Freq TX - 10.692 ) + 2.55
                     --------------------------

  Band 50.020 - 50.240 / 5Khz channel spacing .....

  Xtal Freq =       ( Freq TX - 10.692 ) + 1.275
                    --------------------------
                                4


                            Receive Section
                  ----------------------------------

   C 100    Replace with 8.2pf- 12pf until T7 peaks ( see alignment )
   T 8      Remove internal tubular cap and replace with 8.2pf on back
            of PCB
   T9       Same as T8
   T7       No mods required
   C 104    Replace with 1.8pf cap   ( all caps disc ceramic low voltage )


                                TX Section
                 ---------------------------------------


   C 42     Replace with 1.8pf
   C 185    Remove  ( no cap )
   C 47     22pf
   C 53,54,55  By experiment can be varied from 100 - 150 pf fpr max tx OP
   C 56     22pf
   C 57     56 pf
   C 184    Remove  ( no cap )


                          Coils and Transformers
                    ---------------------------------

   T4,T5    Remove internal tubular caps and replace with 8.2pf under PCB
   T 6      Leave same
   L7       Leave  1 3/4 turns left
   L11      Leave  2 1/2 turns left   ( remove one turn )
   L13      Leave  1 1/2 turns left   ( experiment )
   L12      leave  4 turns left       ( remove one turn )

   L201     remove and replace with straight wire link ( rear of SO 239 )

CONT IN CYBERNET.1