Handy         Adapter         ICOM-8-pin     each original ICOM mic or :
2.5mm      +-2--------------------O 2        +5V (only  IC02E + comp.)
           +     e       c                    ( 2.5mm C500 : 2=gnd , 7=n.c. !)
 1*2*7=====+-1-----.   /----------O 1
           +        > /  TUP                 Mic  (don't block current !)
           +     b -----
           +         +----10k-*---O 5        PTT  
           +                  I
           +-7-+            100pF
3.5mm          +--------------*---O 6+7      GND
           +-6-+
 8*666=====+
           +-8--------------------O 8        SPK

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