Remove VHF & UHF diodes in the pic 2 all up.
  
 Coverage is now 
TX & Rx 
400 MHz to 469.999 MHz 
136 MHz to 173.999 MHz
 This is the Australian version 2720h in the pic so there are only the 2 diodes fitted.
 So I figure if you remove other if fitted you will expand the RX too. 
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