Hello all,
I have been experimenting with a UHF Parasitic Lindenblad build based on this AMSAT article. The hope is to create an easily built (with 3D printer) antenna with good reception for a non-rotator setup.
This antenna will soon go live in @fredy 's ground station for testing.
VNA_170707_145141.pdf (127.5 KB)
The VNA measurement of it attached.
A quick update before a more detailed post.
Antenna works good, especially on low degrees passes. The lowest elevation at which I received signal was on 3 degrees and I’m surrounded by buildings and some mountains on the background.
You can have a look at results on dev-network (don’t be confused by the photo, I haven’t updated it with the new setup).
I’ll make a post with more details on my station and its performance after finished some more experiments. Hopefully will be ready soon to be moved on production network.
Hi fredy,
how is the antenna performing, have you put somewhere the 3d printing sources?
Unfortunately I had some issues and it went off and I haven’t managed to get it online. However I’m planning in the next days to get it up again. From what I remember, the performance (with an LNA) it was fair enough for my noisy environment.
I haven’t construct it, maybe @BOCTOK-1 can point us to the 3d designs.
Nice job! That is the exact same article that I used to build my Lindenblad, currently on station 663 (KB4NKO - Jonesboro, VA). It performs well, especially for a stationary antenna. I can confirm that it even does well at low passes. I like seeing the 3-D printing as well. I would recommend that you publish your STLs on Thingiverse.
My UHF station uses this antenna. No LNA, indoors (attic). It’s ok, but really not what I’d hoped. But I suspect that my expectations were WAY too high. I would like to move it outdoors at some point to see how much that improves the reception.
–Roy
K3RLD
