#antennas — Public Fediverse posts

Entropy’s Rotoscope Issue I [page 5/19]

https://kamiokan.de/entropysrotoscope/issue1

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Next page tomorrow.

#unix_surrealism #comic #art #entropysrotoscope #kamiokande #snails #antennas

3D Print of a multiple #RTLSDR holder that fits the massive USB hub. #SDR person in the #TrunkRecorder discord shared the file.
#OpenSourceSignals #MiniCircuits #Antennas

Some learning.
Some failure.
Some broken stuff.
Reworked some stuff.
Signals are still jacked.
Gonna need to rethink.

#SoftwareDefinedRadio #SDR #RTLSDR #TrunkRadio #Scanner #OpenSourceSignals #Intel #NUC #MiniCircuits #LotusSys #LowNoiseAmplifiers #LNA #DisconeAntenna #Antennas

#HAMradio #Antennas #AntennaTheory #RFI

I got a choke #balun in place on the #OCFD just after the coax enters the house.
The cable going outside to the balun on the antenna itself is KMR-400.
The inside coax is some old 10Base-5 cabling I had lying around. (Two layers of foil, two braids, solid conductor core, about the size of the KMR-400 or RG-8 or 9913.)
The split is there so I can tie the coax to ground (unscrew outside from inside and screw outside to the PL-259 connected to the house ground directly) in case of a lightning storm.
The choke is RG-8x (the small stuff) wrapped around a cylinder about 5 inches across. 13 turns, taped to keep it cylindrical, with quite a few snap-on ferrites on the radio (inside) side of the leftover 8x .
I was able to test 20m last night, and the tuner had a MUCH easier time tuning the OCFD for that band. The RF coming back into the shack on that band is greatly reduced.
I get to test the other 8 bands today.. to see whether the plotted SWR points are similar to what the #NanoVNA says... without the choke, it was an "anything goes" situation.
Wish me luck!