[GreenKeys] modern TU's comments

[Pete Lancashire]

The last time I used a TU it was a URA-8A Just recently I've ended up
with a HAL ST8000A. And have been
offered a Dovetron MPC-100,not sure what suffix I think it maybe a MPC-100T.

Comments on which are better or usable ? Others models ?

Someday will get another CV-89 /URA-8A and a 28ASR to recreate my old setup

Heck don't even know yet what RTTY is still on HF, won't have the
SP-600 fixed up till this winter.

-pete