Bob, like Dudley mentions, you'll need a low pass filter that cuts off
at 400-500 KHz. In fact, I run two in series to keep all the broadcast
junk out.
Every radio I've even owned that tuned below 500 KHz worked the
same...all kinds of BCB "junk" unless you add a filter, including my
Drake R8, Drake TR7, and Yaesu FT-847.
Right now I'm running a short 36" active antenna for LF into my SDR-1000
(with of course the low pass filters in line). From Colorado in the
winter I have copied non-directional beacons from South and Central
America, Greenland, and the South Pacific. I've also copied several 1
watt Lowfer experimental stations in the 170-190 KHz range from across
the USA.
The panadapter is ABSOLUTELY WONDERFUL for spotting extremely weak LF
and VLF CW signals! And my SDR with low pass filters is by far the
finest receiver I've ever owned for LF and VLF!
73,
Jerry Sharp, KD0GS
Dudley Hurry wrote:
Bob,
You will need a low pass filter of the range you are planning to use.
Many have report good results with a 500 khz cutoff low pass or you can
build your own..
73,
Dudley
WA5QPZ
Robert delaney wrote:
I seem to have nothing but images of the AM broadcast band on my
5000A when looking for non directional airport beacons between 150 and
500 Khz.
Has anyone else noticed this image issue? I understand that the
radios specs are for the ham band but I thought it would at least RX
down there.
Thanks, 73
Bob
KA9UVY
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