How can you tell the difference between an Alinco DX-70T and a DX-70TH. I know the TH is 100 watts on 6m and the T is 10w. I think I have a T, but am not totally sure. How can you tell besides hooking up a watt meter? I bought this rig used and it is like new! (I don't have a 6m antenna up yet.) Thanks, Don
Well, the REAL difference is that the TH models use an entirely different Power Amp which features FET transistors for outputs, while the straight T model uses bipolar output transistors.
The TH thus touts better specs in just about every category worthy of mention. The TH makes for a better amplifier driver, as well, when compared with the bipolar, as far as specs are concerned.
The use of the FETS, which have a higher frequency cutoff than the bipolars, is the reason for the increased power available on the 6 meter band. That said, the "magic band" can be just as much fun with 5W as it can with 100W, give or take, due to the nature of propagation on 6 meters. When its open, it doesn't take much power, and when it isn't open, that power difference likely won't be a situation solver in the vast majority of cases. Of course, if you are into line-of-sight paths, it may, if you've got the antenna installation for the job.
Identifying which one you've got is as easy as turning the radio around and inspecting the back panel ID plate.
The TH will be there on the ID tag if you have one.