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ATS 1 Tx Rx Switching Circuit
The instruction manual that was sent along with the kits is for original design that deploys relay for switching supply in Tx, Rx. However the PCB we have got made - is for ATS 1 Ver 2.0 that uses TIP 31 & TIP 32 (NPN and PNP) Transistors for switching.
OK, as informed earlier, here is the cleaned up circuit diagram and board layout for Tx - Rx Switching. Don't go by looking at component layout as it confuses, esp with the location of diode D36 and D37. When you trace the circuit - you would find that it resembles the circuit as shown below!
The diodes mentioned (D36 & D37) are IN4148 in diagram below 
And here is the piece from the main board : look for this section in the right corner (Sidetone oscillator - CW Section).
Thanks,
Gaurav
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