Hi all,
I want to play with NOAA…Is there anyone here who has already tried
it? Can
someone reccomend me an antenna with acceptable performance, which is
not
difficult to build? I have an ezcap tuner.
Thank you,
Marco Ribero
I think a lot of people use a QFH antenna, or a turnstile antenna for
NOAA satellites at 137Mhz.
–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
On Wed, 15 May 2013 08:29:59 -0400
“Marcus D. Leech” [email protected] wrote:
I think a lot of people use a QFH antenna, or a turnstile antenna for
NOAA satellites at 137Mhz.
Note that you will almost certainly need an antenna amplifier too
(unless
you make a huge antenna 
Even a specialized receiver needs one to
compensate for the cable loss. And the ezcap receiver is not too
sensitive either…
As Marcus stated, many use QFH antennas (sometimes called QHA), though
many also use turnstiles (two, crossed dipoles) because it looks easier
to build.
If interested, there’s some info you might find interesting on my site:
Quadrifilar helicoidal antenna - Introduction (QFH antenna construction)
GaAs antenna preamplifier (Example antenna amp)
John
Hi
Here is the 137 MHz RHCP antenna we have developed
http://www.poes-weather.com/download/jm-dca/
This antenna will give you better performance at low satellite
elevations (horizons).
It is easy to build and you don’t have to be that careful.
We don’t use a pre-amp if coax < 15 m (loss ~2 dB RG-58).
–
Best Regards,
Patrik T.
POES-Weather Ab Ltd Remote Sensing
Business id: FI 23624190
CEO Patrik T.
GSM: +358 40 833 11 70
Street address: Furuskogsvgen 89
Postal code: 65280
City: Vasa
Country: Finland
Web: poes-weather.com