On 5/3/22 08:21, z man wrote:
Hi all, I am in search of an antenna that I could use to receive the 2 meter telemetry signals from AO-73, Nayif-1, etc. While I am having
Let me quote Burns Fisher (WB1FJ) from Feb of last year:
It depends on your goals.
If you want the absolute maximum telemetry, then you want a regular beam and rotator, same as you would use for QSOs. I have that for normal SatCom and some coax switches/relays to switch it from my radio to my FunCube Dongle/FoxTelem.
Normally, I use homemade Lindenblads for my FoxTelem telemetry and also the same set with a splitter for my SatNogs station. The most recent AMSAT Journal had two designed for 3D printed 70cm Lindenblads, although the ones I am currently using are AA2TX's (search for AA2TX Lindenblad--there are two different articles/designs, one for each band).
I have also mentioned in the past that I have had surprisingly good luck with an Arrow Antennas dual-band J-pole. It is not going to pull in as much as a beam and has a few null spots (like right off the end), but it is inexpensive, dual-band, no building required.
I've also had good luck with a "plumber's delight" J-pole on 2m and a relatively simple home-brew 2m preamp to set the system noise figure at the antenna.
A couple of leads:
"Ed Fong WB6IQH VHF/UHF Dual Band J-Pole" https://www.youtube.com/watch?v=JyW_CCzPXSQ
"LNA for all - Low Noise Amplifier for many applications from 28 MHz to 2500 MHz" http://lna4all.blogspot.com/2013/04/lna-for-all-low-noise-amplifier-for.html (depending on location -- cell towers and FM transmitters, you may need additional filtering to avoid overload.)
"2 meter Preamplifier with Band Pass Filter" https://antennas-amplifiers.com/product/low-noise-preamplifier/2m-bandpass-f...
As always: Cheap, Fast, Good. Pick any two.
--- Zach N0ZGO