pointyhead wrote:
Is the plastic "lump" that is used to join the ladder line to coaxial cable
really a balun or simply a "ladder line to coax adaptor" as they put it?

Mine had about 20 ferrite core donuts over the end of the coax in PVC
pipe. I discovered this when I replaced the coax-xfmr section with twin
lead all the way to my tuner, which gave me a better antenna. In a
sense it's a balun, it tries to keep RF energy from conducting back up
the shield of the coax so the balanced line twin lead approximates a
balanced line.

W8LNA