At 10/4/2009 11:24, you wrote: >Hi All, > >I am looking at the changing radios on our repeater because of the >problems we are having. > >We are using a GE Mastr II into a 6 can duplexer and up via 1/2 hardline >to a G7-144. > >However, we can not raise the power above 10 watts before de-sense sets in.
What makes you think the problem is the TX? I can't even remember a case I've seen where a problem similar to what you describe turned out to be due to a bad TX. > Also the radio will climb in power level as it gets hot. > >I set it at 5 watts out and by the end of a half hour net it is up to 12 >watts out. > >In my opinion this is not right. Sounds exactly like what a 75 or 110 watt Mastr II RFPA would do. You need to run it at a power level closer to its rated power. If you need less power, you need a PA with lower output. I'm about to throw a 110 W VHFHB Mastr II mobile on my bench that's going to have it's final PA bypassed: routing the 25 W driver board straight over to the harmonic filter input. >What radio would be good for a 2 meter repeater. If you don't like the GE Mastr II, how about a GE MVP? ;) Seriously, if you feel you must use current production equipment, the Kenwood TKR series seems to perform the best. Bob NO6B
