I’ve been using a homebrew Lindenblad with PGA103 broadband preamp for a few months now. I also run a 5-el (homebrew from DG7YBN design) yagi with preamp on an az-only rotator. There appears to be ~6 dB difference in signal strength, but the Lindenblad gets from 65 to as much as 90% of the number of frames from the yagi over a 24 hour period. I think that is quite good. Of course performance varies with sat elevation. Each feeds a separate FCDP+ to an RP3B, running FIAB. Each combination has been tested for very similar decoding characteristics. This is a fairly rf-quiet area, so broadband preamp is ok. I used to use the the FCD-RP3 setup on a 137 WXSAT QFH with a fairly narrow band preamp (but it is really good on WXSAT; good pics at ~1 degree elevation). It was much worse than the lindenblad of foxtelem. But better than nothing! Haven’t tried J pole. Yet.
Ed Krome K9EK
Sent from my iPhone
On Dec 8, 2020, at 4:34 PM, Zach Metzinger [email protected] wrote:
On 12/08/20 12:17, [email protected] wrote:
I am looking into building 2 omni-directional satellites,just wondering if anyone is familiar with these 2 and can give me their opinions on them? link:
You haven't mentioned which bands, but I assume the pair would be 2m and 70cm.
I've tried the K5OE square eggbeater for 2m and was disappointed. I've found that a "copper cactus" J-Pole (without LNA) for 2m works very well.
An example of reception for the J-Pole: http://www.n0zgo.net/oscar/ao-91.mp4
Are you a member of AMSAT? If so, check out the latest issue (Sep/Oct 2020) of the AMSAT Journal for a 70cm omni-directional solution in the form of 3-D printed antennas.
An example of reception for my 70cm passive Lindenblad design (seek about 7 minutes in for strongest signals): http://www.n0zgo.net/oscar/rs44_20201028_2126Z.mp4
--- Zach N0ZGO
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