The idea with the balanced feed is that it provides better common-mode
noise pick-up rejection than any type of coax which can have
ground-loop current on the shield.
Mark
-----Original Message-----
From: Steve Byan <[email protected]>
To: [email protected]
Cc: ABDX <[email protected]>; Mailing list for the International
Radio Clubof America <[email protected]>; AM-DX List <[email protected]>
Sent: Thu, 12 Feb 2009 1:25 pm
Subject: Re: Indoor vertical update
On Feb 11, 2009, at 10:12 PM, Craig Healy wrote:
Until now it had been a couple of rooms away fed by a 40' length of >
RG-58 50
ohm coax. There was a significant noise issue and a number of >
birdies that
swamped a number of frequencies. And, some electrical buzz would >
run for 30
seconds on and a minute off. Gave me 2/3rds DX time.
I've taken to using quad-shielded RG-6 (cable TV drop cable). The
garden-variety RG-58 and RG-8 doesn't have enough braid coverage to
give good shielding. You can find quality RG-58 cable like Belden 8259,
but it's expensive. Quad-shielded RG-6 cable has even better shielding
and is cheaply available from Home Depot. You really do need to invest
in a Snap-N-Seal tool and compression coax connectors. The Home Depot
connectors are useless.
I replaced the RG-58 with CAT5 ethernet cable of about the same 40' >
length.
CAT5 is pretty g
ood stuff, and handy where you have a balanced feed.
Best regards,
-Steve
--Steve Byan <[email protected]>
Littleton, MA 01460
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