I have an Ft 840 and my biggest gripe is that you can't key a linear with it. There is supposed to be a way to take a mini 7 pin din plug on the back and use pin 2 to ground to key a linear but it don't work,(every try to solder up a 7 pin mini-din plug??) and then Yaesu has a fr-737 or something as an adaptor, but they dont make them any more so its out too.
I finally put it in my pick up truck and found a RM hf linear (600 watts ssb) that will key from the rf sensing so I solved it that way. It has virtually no dsp either, but a nice little rig all in all. I just wish they would have told me about the inability to key a linear, I wouldn't have bought it brand new for almost $700, I would have bought a used Icom 706 for $600 instead.
Bye the way I now own a Kenwood 570 g (d), my main rig, an Alinco dx 70 ( will end up in my next car ), a Icom 706 which will be my backup station in the house next to the Kenwood (Kenwood has bigger knobs and is easier to use), an Icom 720 which is going in my travel trailer/portable command center/ camping trailer, the Ft 840 which is in my 1/2 ton Ford p/u and an Icom 730 which will probably be sold or traded for something.
I like buying and selling rigs as much as I do playing with them.. remember he who dies with the most toys wins!!! I think I'm in contention
Any ways have fun and welcome back tom N6AJR (all junk radio)