In message , vangellis
writes
This link shows how I have "grounded" the setup
http://www.geocities.com/qrp_baluns/LMZ-50-Ground.GIF

vangellis

It's interesting that they have one version which is described as a 10:1
impedance matching voltage transformer, for 50 ohm coax, and the other
described as a 9:1 voltage balun transformer, for 75 ohm coax. It could
be that they are essentially the same inside (why would they want to
make two different types?), but with different connectors. Neither are
actually acting as baluns (although they be using balun transformers
inside the can).

Some time ago, there was report published of tests which compared the
received signals levels with - and without - this type of transformer.
From memory, it showed that, on most frequencies, there was a very
noticeable increase of signal level into the receiver. Only on a
minority of frequencies was there some (acceptable) reduction of level.
I've had a quick Google, but haven't yet found this report.
--
Ian