HI all. I am using a MC50 on my TS120 and I sometimes have a little bit of RF, but I suspect the rig, rather than the microphone. I am borrowing a TS450, but I just have the hand Mic with that one. I would love to get an adapter cable made up, to go from the four pin to the eight pin plug, and se what the mc50 sounds like on the 450. I used one on my TS440 and it worked well. Unfortunately, finances were such that I had to sell that package. A blind hams list member has it, and I still miss it! GRIN! 73 and 88 whare appropriate: JOhn ________________________________________________________________ The best thing to hit the Internet in years - Juno SpeedBand! Surf the Web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today!