On Jan 5, 9:20*am, dxAce wrote:
Billy Burpelson wrote:
RHF wrote:

FWIW - Burying the Coax Cable is simply one of the many
Synergistic Elements that goes into making a Low Noise
Shortwave Radio Listening (SWL) Antenna -a-la- John Doty

Three Rec.Radio.Shortwave Messages to Read -by- John Doty
http://groups.google.com/group/rec.r...bc6a2bf8acc12d

Well, "John Doty" in the reference above says:

Any *unshielded* [my emphasis added] conductor in your antenna/ground system is capable
of picking up noise: the antenna, the "lead-in" wire...

First of all, isn't the "lead-in wire" (coaxial cable in this
discussion) -shielded- ? So according to his -own- statement, coax
shouldn't have to be buried, at least from a noise mitigation viewpoint.

Doty continues:

You can keep noise currents away from the antenna by giving them
a path to ground near the house, giving antenna currents a path to
ground away from the house, and burying the the coaxial cable from
the house to the antenna.

In the 1930s, Bell Laboratories, while investigating power line
influence on telephone cables, proved that burial had NO effect on noise
being induced into the telephone cables; i.e., 20 feet of aerial
separation, from a noise standpoint, was exactly the same as 18 feet of
aerial separation plus being buried 2 feet deep.

Hmmm...should I believe "John Doty" or Bell Labs? You're a smart guy --
I'll let you figure that one out for yourself. * :-)

Or, you might believe the 1990's rather than the 1930's :-)- Hide quoted text -

- Show quoted text -

Yeah DX Ace - Sort-of : That Was Then . . . This Is Now ! ~ RHF

WHY - Bury Your Shortwave Radio Listening (SWL) Antenna's
CoaxCable Feed-in-Line ?

Amplified Audio Frequency Signal Distribution -circa- 1930s
and the 1930s RFI-EMF Environment
- = Versus = -
Passive RF High Frequency Signal Distribution -circu- 1990s
and the 1990s RFI-EMF Environment