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Interface Cable Relay Circuit

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CT1BWW

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Hi Fellows,

Maybe anyone from can solve this. On my Amateur radio Station during many years I've used a Interface Cable between my Transceiver Kenwood and my Heathkit SB200 HF amplifier. Last weekend during a contest the relay fault. The circuits consists with a OMRON 12VDC Relay,56KOhms and 2 NPN Transistors Darlington in Parallel. I've to replace by another relay . The problem I miss the conections from 56kOhms and 2 NPN parallel Transistors .
Anyone have any idea ?
please look at image BUFFER circuit
Thanking in advance for replying.
73s frm Marq
 

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