low-cost 433MHz antenna shootout (eight of 'em)

Testing 8 low-cost antenna options for 433MHz (70cm band).

Equipment used:

Standard Moteino ($12.99) at www.lowpowerlab.com
https://lowpowerlab.com/shop/product/99
(I used these for both the base station as well as the hand-held mobile unit)


The antennas I used (or comparable model):
(Note: some links may not be valid anymore)

Antenna #1 (centre-loaded quarter wave vertical)
https://www.ebay.com.au/itm/SMA-Male-...

Antenna #2 (PCB J-Pole)
https://www.ebay.com.au/itm/New-433MH...

Antenna #3 (short helical)
https://www.ebay.com.au/itm/433MHZ-1X...

Antenna #4 (sleeve dipole)
https://www.ebay.com.au/itm/New-433MH...

Antenna #5 (PCB Dipole [my design])
Order PCB from OSH Park directly: https://oshpark.com/profiles/captcha
How they were made: https://lowpowerlab.com/forum/rf-rang...
Diptrace design files: https://lowpowerlab.com/forum/rf-rang...

Antenna #6 (monopole, bit of wire)
See this video for tuning the wire:    • monopole 433MHz antenna length  

Antenna #7 (short helical for high power)
https://www.ebay.com.au/itm/M-Male-PL...

Antenna #7 (whip antenna)
https://www.ebay.com.au/itm/AU-Stock-...


On the base station I used the short helical (same as Antenna #1)

30 dB Attenuators
https://www.ebay.com.au/itm/Golden-At...


Earlier test with similar results;
https://www.marcelpost.com/wiki/index...