A case of “Well, that didn’t go quite as planned” KE4COL and I met at the tower site Saturday morning to put the 145.230 Gold Hill machine back on the air and discovered a desense problem. Yes, a bit of cussing ensued, but not at one another — just in general, shared frustration. So […]
A set of Motorola T-1504A duplexer cavities arrived yesterday for repairs, overhaul, tuning, and testing. I managed to get them turned around in less than 24 hours. They will be on their way back to California tomorrow. The owner of this set sent them to me because they would not tune. On opening and […]
The 444.100(+) WA4QHN Salem, AL repeater recently started developing serious sensitivity problems, so the owner and I pulled it out of service and brought it here to my QTH so that I could troubleshoot the repeater and duplexers and get it back in shape. As soon as I hooked the repeater up here in the […]
I managed to finish the refurbishing of the last two cavities on that set of Motorola T-1504 UHF BP/BR duplexers yesterday. These are headed to a new home on a repeater down in Florida. They’re working great, doing just over 102 dB of isolation per branch, and only 1.1 dB of insertion loss per branch. […]