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clanon
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@Harry36 might know details of these methods...
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They keep the 50 ohms shield with the 3 posts surrounding the inner wire...? maybe there is impedance matching there or is it a BALUN...? also there's a CUT by the shield of coax...
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LOL ! NO WAY (no my cup of tea) but that Russian feed POSTS YOU KNOW IT WELL...(LPDA or Vivaldi would be easier to do and tune)
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Feeding posts...(3 Of them and shield)
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Double Bow Tie , How is fed ? (the coax braid to reflector UNBALANCED)
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the coax BRAIDS wires have to be FIXXED by soldering , creating a solder washer and then you can add screws and a washer to FIX IT to the main reflector (it shouldn't MOVE !)
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900mhz
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Great gain if true...
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VSWR (kroks) Gain 1800
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copper wire same diameter...i dunno if the dielectric is needed...
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If noise is fix you increase SIGNAL = GAIN ...(adding directivity will also lower Noise from out of the main lobe signals) a bigger reflector might be enough
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5G not available or not registered...so it might be just on 4G...(which has a practical limit close to 100MBPS)
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you COULD try with triangular elements they build it like that (two flat stamped sheets) for easy manufacture and cheap...
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https://www.youtube.com/watch?v=jv6sk93HDjo
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Spillage , Efficiency , Blockage and Lobe Shape are the main factors