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Listed here are some good interfaces you can build yourself with parts available at every Radio Shack, or you can purchase them from prewired from the designers. There are several designs here to choose from.

BUX COMMCO has a wide variety of interfaces and wiring diagrams for most radios.  If you don't wish to build one you can Purchase one from them. Click here to see

From WM2U (Who has an excellent website) comes these designs and is what I use with some slight modifcations and integration.


This PTT circuit utilizes the DTR (top) or RTS (bottom) from your serial port to key your rig. It only takes a few minutes to put together and cost a couple bucks for the parts.


Simple isolation using a transformer from Radio Shack. Helps stop ground loops.








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