I have the cable connected to the 440, but i found that i have to use the band switch also to tune the different bands. If, after changing bands, the auto antenna tuner does not stop at match within 20 seconds, momentarily return to the receive mode, and then again operate the tuner for a match. Anyway seems to work quite well for such a simple antenna. More radio amateur kenwood antenna tuners kenwood at120 at 120 at120 antenna tuner. The builtin swrpower meter indicates peak power on ssb, average power in other modes and does not require calibration adjustment. Automatic antenna tuner at 250 amateurd trio kenwood electronic inc komagane, build 1990, 3 pictures, schematics, 31 semiconductors, japan, tubes. Four separate sets of antenna terminal are provided. Kenwood at 250 automatic antenna tuner ham radio picture at myhamshack you get a free personal web page for your shack your shack. The at 250 is capable of sustaining ioow continuous. Kenwood at 250 user manual antenna tuner hf keywords.
Second hand kenwood at250 auto antenna tuner radioworlduk. Buy second hand kenwood at 250 auto antenna tuner from. Kenwood at250 automatic antenna tuner ts430s 440s 140s. Kenwood at250 automatic antenna tuner ham radio picture. The kenwood at 250 automatic antenna tuner covers the hf ham bands from 160 through 10 meters including warc. It has an ac power supply built in plus dc terminal. The at 250 can tune it on 80301510 and i dont need the tuner on 40201712 and some of 10 metres. Second hand kenwood at300 automatic atu radioworld. I mentioned the 4 metres of coax because usually the higher the coax losses the easier it would be for the atu to tune it. Off off anti auto preparation unless specified, front panel power sw. The builtin swrpower meter indicates peak power on ssb, average power in other modes and does not. When the tuner and tune switches are turned on and the ts430 trtnsceiver ig placed in the transmit mode, both forward and reflected power are detected by. I bought this tuner to use with my kenwood ts440sat. Yes, the 440 has the antenna tuner in it, but it will not tune on the 160 meter band.