Greetings. Enjoying the FLEX-6300 and Smart SDR 1.6.17. This is real treat since I've been using my FLEX-3000 without issues for about 3 years now. Now that I am able to connect the 6300 (ESET Security was blocking) and got a chance to play with Smart SDR, I decided to hook up my THP HL-550fx amplifier to the 6300. When I tune with anymore than 10 watts the amp overdrive circuit kicks in (never had this problem with the FLEX-3000). It also kicks in with SSB with the power set at less than 50 watts talking in a "normal voice". I played with software settings, referring to the Smart SDR manual and tried many different combos, but the amp still kicks off. I have RCA plugs going to the amp from the rig in the PTT and ALC. I was a tad worried that I might have done something to the amp and hooked it back up top my FLEX 3000 and it works fine. Any suggestions. Thanks.