I'm curious about the antenna, as well. I can send myself CW at 100mw (the lowest power my radio will go) from my QTH (near Snohomish) using a G5RV with a peak about 30ft, and receive it on the SDR anywhere from 559 to 599, depending on the band. Granted, that's only maybe 20 miles, but still rather impressive for 100mw and what sounds like a very compromised antenna on the Haystack end.

You guys planning on adding this to sdr.hu?

Jeff/N0GQ

On Wed, Jul 11, 2018 at 12:51 PM, Benjamin Krueger <ben.krueger@gmail.com> wrote:

What kind of whip? If it's just a ground rod, adding radials should help.

On Wed, Jul 11, 2018 at 12:44 PM Bart Kus <me@bartk.us> wrote:

Hello,

The recent Haystack work party managed to install a receive-only SDR up
there.  It is provisionally available for use by anyone at:

http://44.24.241.60:8073

I'll move it to a more permanent address, with proper DNS, at some
future point.

In the meantime, I'd like to solicit advice on how to minimize the QRM
it's picking up.  The noise is being emitted by the site itself, from
the Ethernet cables and such.  I've connected all the shields to site
ground, but the emissions are still there.  The current antenna is a
ground rod with vertical whip.

1) Is there a better antenna design that can serve the broadband
(DC-30MHz) omnidirectional receive duties?
2) Are there any suggestions on how to further minimize the noise being
emitted by the site?

Thanks, and enjoy!

--Bart

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Benjamin

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-=jeff=-