Hello Wayne,
I strongly recommend that you investigate small receiving loops. They
are much quieter than a dipole or vertical, and because of their very
sharp and deep nulls perpendicular to the plane of the loop, you can
null out local noise sources by simply rotating the loop to place the
noise source in the null. Here's a link to an excellent website with
lots of great information. I built a small receiving loop for 40m out of
a single turn of 5/8" copper refrigerator tubing, with a loop diameter
of only 4 feet. (A 20m loop would be only 2' in diameter) Since I don't
use it for transmitting, the capacitor to resonate the loop does not
require a high working voltage rating, and can be a simple silver-dipped
mica capacitor. I have a 40m ground plane at about 25 feet, and a 40m
half-sloper with the top at 40', and the loop hears significantly better
than both. It also works very well close to the ground. Mine is only
about 8 feet above ground.
Your FLEX-5000 makes it easy to receive on the loop and transmit on
another antenna, by simply connecting the loop to the RX1 IN BNC jack,
and the transmit antenna to one of the ANT# connectors.
Here's the link to the website: http://www.aa5tb.com/loop.html
... and here's a link to AA5TB's very helpful loop design spreadsheet:
http://www.aa5tb.com/aa5tb_loop_v1.2.xls
73, Dale
WA8SRA
[EMAIL PROTECTED] wrote:
After total failure with an IBM Thinkpad notebook (the firewire/cardbus
and all but the kitchen sink on irq16 - Windows just plain stopped
dead),
I finally have my new 5000A up and running on a MacBook Pro using
BootCamp/Windows XP (firewire is the only device on irq19).
Unfortunately I am in a temporary apartment and using a screwdriver
vertical on a 3rd floor balcony... the noise level is S7 to S9,
so I can't hear much. Next step - 20 and 40m indoor dipoles. Hopefully
less noise.
At least the Flex is running, so now the learning curve starts.
Looking forward to working some of you Flexers once I can hear
something.
73,
Wayne
K4ELO
[EMAIL PROTECTED]
_______________________________________________
FlexRadio Systems Mailing List
[email protected]
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
_______________________________________________
FlexRadio Systems Mailing List
[email protected]
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
