Originally Posted by TheLazyL
Mike was keyed too long or numerous times with the antenna disconnected resulting in the Transmit side of being fried?
I'm not sure what happened! It worked perfectly fine, didn't use it for a month and when I went to use it it wouldn't transmit.
My best guess is that for the HF side I have a borrowed antenna tuner that takes a lot of playing with to work, you can't know the position of the dials for a certain frequency and set it there before transmitting. I knew some generalities for 20 and 40m but getting the antenna tuner dialed in was guess work. If it wasn't something like a power surge, lightning or old age I think it was from too much swr from the antenna because of a crappy tuner. I'll get a new tuner before it gets used again.
The UHF/VHF side is another story, I bought the radio on eBay, when I got it everything seemed fine but I didn't really use it because I was in the process of getting my general license. I decided to put it in my daily driver for 2m/70cm and sometimes it would open up the repeater and sometimes it wouldn't. Talked to a local tech and he said that the 706 series had a very narrow variation on the tone frequency for repeaters which worked fine in the "old" days when people used the right repeaters but now with people buying used commercial repeaters and modifying them there needed to be a wider tone transmission. So I didn't do anything with it for awhile. He may have been full of it I don't know. Later I was trying it simplex and discovered it only transmitted for about half a second. Now I don't think the VHF/UHF side ever worked since I had it.