I have a K3 and want to key two different external amplifiers. The K3 has one "key out" line this I use to key an Expert 1K 160-6 meter amp. Now that I've installed a K144XV board I want to key a 144Mhz block amp. I wondered how my fellow hams are keying two seperate amps separately with one key line? Thank you. R Thorpe K6CG