Ian Jackson wrote:
In message , Jeff Liebermann
writes
On Mon, 16 Jul 2012 19:49:21 +0100, Ian Jackson
wrote:

In message , Jeff Liebermann
writes
Coiling the entire 100ft of twinlead into about a 2ft dia coil
resulted in an additional 3dB loss due to radiation.

Coiling the coax shouldn't make a scrap of difference.

True for coax cable. However, coiling twinlead added 3dB in loss.
It's common practice to coil the excess cable rather than cut it. Not
a problem with coax, but potentially a bad idea with twinlead. Nobody
is going to coil 100ft of twinlead into a 2ft diameter coil, so the
3dB loss is probably worst case.

Ah yes, sorry. I missed the 'twinlead'. I've never really thought about
what happens what happens if you have a roll of twinlead coiled up. It's
simply something you don't do!

Unless you use shielded twin lead. I used it on an antenna way back. Seems
like strange stuff, but didn't require transformers.

Greg