Topband: Beverage transformer and testing

[Mike Waters]

I always line the holes in those cores with irradiated polyolefin HST. You
just have to stretch it a little, and it will easily pull into the holes.
(Photos at
www.w0btu.com/Beverage_antennas.html#Beverage_Antenna_Transformers

Then we can just use magnet wire, 24, 26, or 28 AWG. I mostly use #26. The
larger the wire, the better chance that it will survive a lightning-induced
surge even with protective GDTs.

Two turns on the low-Z winding are all that are needed.

73,
Mike
www.w0btu.com