Let me add one thing. Presuming they still teach Morse Code you may get a leg up there. I spent a lot of my evenings in Ding Dong School trying to master the 18 WPM sending and receiving tests.
Do a search and there are several sites (some free) on the Web where you can learn and practice.
A book on BASIC antenna theory can be helpful. The AARL Antenna Handbook was my bible and I almost always had it with me.
It is a great MOS. I'm glad to see they are sending more experienced students there. In my day the commo and demo classes were almost all pvts and Pfcs like me. The older soldiers with prior service tended to go to weapons and O&! training.
I lied in a privious post. I did get promoted in Training Group -- from Pvt E-2 to Pfc E-3.
