 My first homebrew project in 27 years...
This box provides switching services between receivers, level adjustment for waterfall and rig drive from the computer sound card for RTTY/PSK and hosts an external keyer. It also provides switching control for antenna selection, amplifier enable, keying of the auto-tuner and amplifier key-down fuction for tuning. It was built in May 2008 and many of these services are now moved to other boxes or are obsolete. However, the interface still helps to keep order in a shack otherwise overrun with control cables. 
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