[Lowfer] 630 Meter WebSDR RX

[Clint Turner]

Hello,

I thought I'd mention that there is now a 630 meter receiver on the 
Northern Utah WebSDR (for which I am one of the sysops) that may be 
found here:

http://websdr3.utahsdr.org:8901/?tune=474usb

The receiver itself covers from 389 kHz to 485 kHz - this being the 96 
kHz bandwidth limit of the sound card.  This is using the same antenna 
as the other HF receivers at the site and even though the antenna itself 
is rated for 3-30 MHz, it seems to function well at 630 meters, often 
capturing VK4 and Alaska/Hawaii on WSPR:  The "KA7OEI-2" WSPRNet reports 
are from a KiwiSDR at this same site.  More information about the 
receiver and antennas at this site can be found by following the 
"Technical Information" link and looking at its linked page(s).

Unfortunately, the antenna's performance falls flat by the time one gets 
to 250 kHz and the E-field whip at my urban QTH outperforms it on 2200 
and 1750 meters - although we are looking into the practicality of 
installing an E-field whip or H-loop on the site to cover 1750-2200 
meters.  While the site is normally "pretty quiet" in terms of AC mains 
noise, there's an intermittent problem on a nearby powerline (>1/2 mile 
away) that we're trying to locate.

Although this new receiver is "just in time" for summer, it will 
(hopefully!) be online for the coming fall/winter LF/MF season.

73,

Clint

KA7OEI