Mark Hampton wrote:
I have a S-9 noise level across the bands and despite some detective
work,
One other thing to consider is whether the interference is actually
coming in on the "earth" connection. With the K2, on 80m, I find that
the noise drops drastically when I disconnect from the mains power
supply (a very old one that has high leakage and therefore needs to be
earthed and the secondary side) and run on a battery. It drops from
about S9 to about S2 (although my S meter calibration is suspect). This
is using a crude indoor doublet, with a BL-1 and with a clamp on ferrite
ring on five or six turns of the DC supply cable.
My impression is that the BL-1 isn't terribly effective on an
electrically short (about 10m either side, although not in a straight
line) antenna at 80m, even though the KAT-2 can tune it. I'm going to
have to do more research on indoor antennas.
I'm in a first floor flat and running a separate functional (RF) earth
is not possible, and it would be electrically long if I ran it, anyway.
Note, make sure that you understand the issues about protective
multiple earthing, and know how your electricity supply is done, before
providing any alternative earthing.
--
David Woolley
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
