Diamond Antenna Super Gainer SG-M507

Antenna review, SWR measurement

[@buddhistsympathizer1136]

It looks like a standard 1/4 wave vertical antenna with a coil 'trap' for 70cms. Simple, effective but no gain.

[@hugov392]

Great video. Did you perform the VNA calibration at the end of the long patch cable? If you do the short/open/50 ohm calibration at the SMA jacks on the VNA, then plug in a long cable via some adapters and finally onto the antenna, what you're measuring is the combined cable-adapters-antenna system as a whole, whereas if you do the calibration at the far end of the cable where the antenna plus in (which might need different calibration standards to suite the connector at that end) you get accurate results.

[@pablomasc9066]

Wow nice antena! Greetings from Arg 🇦🇷

[@webandmedialb]

Hi friend, do you think testing the antenna without a metal ground plane such as the roof of a car is consistent? I believe it needs a radius of 1/4 wave surrounding it to give a proper result. I highly appreciated your video using NanoVNA - Cheers!

[@kta1540]

They are one of the "radial-less" antenna as Diamond states it. So it doesnt need any additional grounding works

[@stanelef4449]

Good review! Thanks for the info.

[@bayanicruz8914]

Good tx rx ..simplex 50kms full bar signal 5 star for me..