I have started working on a Swan 500CX SS16 transceiver and find that the 6LQ6 Power tubes are dead (at least on my 6000 Hickok Tester). I have a pair of NOS 8950s (HyGain 8908) that have been in my junk box for about 15 years ($10 for the pair back then). What is the trick to adapting these to the 500CX and does the PS need modification? 73, Jim Zellmer KA0VSL