Geoff,
Try the K9AY loop. It does well for me here. I use it for 160 (the design
frequency) but it has served me very well on 80, 40, and 30. I would think
it would help on BB.
73, Mike WA5POK
--------------------------------------------------
From: "geoffrey mendelson" <[email protected]>
Sent: Saturday, February 12, 2011 1:56 PM
To: "Drake List" <[email protected]>
Subject: [Drakelist] SPR-4 medium wave antenna?
I live in a "sea" of electrical noise and need an antenna for the SPR-4
for AM broadcasts. I tried to duplicate the loop that was made for the
SPR-4 using RG-6 and it simply did not work. The broadcasts were weaker
than the noise. Even using the loop (with my HF antenna disconnected) the
noise was stronger than the calibrator.
So I need to locate antenna outside the noise, which means I need to use
about 10 meters of coax. Due to availability and price, I've decided to
use RG-6 coax. I can run an antenna at about 6 feet above ground level
(in a valley) and a maxiumum of 11 meters long.
What should I use? A dipole? An end fed wire? If I use an end-fed wire
what do I ground? Should I make a 9:1 or other transformer? I have
several sizes of Russian made ferrite rods with a permeability spec of
400. I only have #24 stranded plastic insulated and 1mm solid plastic
insulated wire.
Should I connect the coax to the antenna input or the loop input?
The receiver is on the second floor. At the far end of the antenna is an
HF vertical that goes to the first floor, and there is a ground rod
there. If I do ground the coax or use a transformer, I can either run an
extra 10 meters or so and put it near the ground rod (and other antenna),
or put it closer and run a 10 meter 1mm solid wire to the ground rod.
Thanks in advance for any advice.
73,
Geoff.
--
Geoffrey S. Mendelson, N3OWJ/4X1GM
Those who cannot remember the past are condemned to misquote it.
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
