Re: 80 meter cw rig #80m
I finished my 80 meter QCX last week without a problem. I used the alternate technique for T1: wind the big secondary in a single layer all the way around and then the other windings on top. I also wound 71 turns as I figured it would be easier to remove turns than to add. I ended up with 69 turns.
80 is noisy. You should be prepared for that. I am having good luck with a receiving antenna: https://www.qsl.net/kc2tx/loopschematic.htm and pre-amp: http://www.mtmscientific.com/preamp.html
I have ordered the 50W PA and will build it for 80. Barefoot, I have reached Mexico and Oregon from Burbank, CA.