I just purchased an FT-950 and the internal tuner couldn't match the vertical I'm using so I tried to connect the external tuner I used on my FT-840 with no problem but it doesn't seem to work at all even though I connected it the same way I had it on the 840. Can anyone help. New radio and haven't been able to transmit yet. If I key the radio the "high SWR" light comes on.
Some questions need to be answered so we can help you.
First. what vertical are you using? The SWR must be high if the internal tuner of the FT-950 will not tune it. However you must remember that the internal tuner is rated for 3:1 or under SWR's on antennas. I have tuned higher SWR's than 3:1 but don't count on it doing that.
Second, what external tuner are you using? Any radio/tuner combo will work. The radio has no effect on the external tuner other than putting power through that tuner.
I have a Palstar AT1500 in line with my FT-950 and it works fine, and I have other tuners in line that worked just fine.
Third. make sure the internal tuner is off when using the external tuner.
Fourth, if you have engaged the internal tuner did you hold the TUNE Button long enough for the tuner to actually try tuning the vertical? You need to hold the Tune button long enough to engage the tuner. If the tuner will not handle the SWR it just shuts off. If it can it will cycle through until it gets the SWR down low enough to operate the radio.
Any other questions feel free to email me. I have owned my FT-950 for some time so I might be able to assist you further.