Hi Folks, Well, I got the hardline duplexers completed for 6 meters, and after a shakey start, they now work at power. Looks like about 100dB notch & 1.5dB loss through each set of 3 'cans'.
Using RG-142 as the inter-can connections, and RG-214 between the TX/RX & duplexer. All the 'business' ends of the hardline duplexer cans are totally shielded. Hooked the antenna port to a dummy load with sampling port (to inject the RX freq), and we got lots of desense. With a Bird inline with the TX input, it shows 80W going in, 0 reflected. 50 W coming out of the antenna port. The match looks good. Am using a micor repeater shelf for the RX, but using a converted micor mobile as the TX. It is located above the RX. All shields are in place, both TX & RX. I guess the basic question is whether using a Micor Mobile is a good choice. (it was chosen as it was available) I cranked down the power to 5 watts (using one of the caps on the PA). Granted, sometimes these guys get unstable doing it that way, but the desense seemed just as bad. Perhaps I just introduced a different desense cause by trying it. Anyhow, just curious about the viability of using the micor mobile as a TX in repeater service. I understand about heatsink/ heat issues, and plan to run it at reduced power (per motorola tuning sheet). Thanks, Tim W5FN
