--- In digitalradio@yahoogroups.com, "doug_tara2005" <doug_tara2...@...> wrote: > > Hi, > > I'm having a little problem with my antenna tuner when transmitting PSK-31 > above 30 watts. I have a IC-706MKIIG with a MFJ-945E. Both are on their own > powersupply and well grounded. When I transmit PSK-31, it locks up my > IC-2820H (D-STAR) radio (unable to transmit DV, analog or control the radio). > My IC-2820H is on a different powersupply and also grounded. The radios and > tuner are about 3-4 feet apart from each other. Additionally, I use to have > a KPC-9612 and it also locked up from time to time and had to do a hard > reset. I didn't think anything was at fault and have sold my KPC-9612, but > the PSK-31/auto tuner could have also been locking it up. Does anyone else > have this problem? Can anyone give me good advise about my setup? > > --73 de Doug (N1OBU) >
It sounds like you are transmitting into a poorly matched antenna. What kind of antenna and feedline do you have attached to the tuner? I have ladderline coming right into my MFJ-993B. If I tune up starting into a poor VSWR at anything over 20W I will lock up my CAT interface. But once I am tuned up 100W is no problem in any mode, although I still get a little EMI on the CAT that affects meters on HRD. Scott
