Hi Elecrafters, I am ready to key my Drake L-4B using my K2/100 but I read from a previous post: "If you already have the KPA100, look on the rear panel and you will see an RCA jack marked "PA KEY OUT" between the ground connection and the power connector - this will allow you to key your external amplifier directly - but only if your amplifier has a positive voltage for its keying line. If your amplifier uses a negative voltage keying circuit (like the Collins 30L-1 and some others) you will need to construct an external circuit to key the amp. 73 --don n4hh K2/100 #2028 " Does the Drake use a negative voltage for the keying (line)? If it does what modification do I need. I installed the Soft-key mod made by Harbach. I am not sure whether that converts the Drake to positive voltage keying. Any help is appreciated. Ariel ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected]
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