Review on 📡 Electrodepot 433 MHz Unity Gain Omni Antenna: 6" with Magnetic Base & Male SMA Connector - 50 Ohm Impedance by Joshua Mccall

I don't know much about radio and certainly don't have harmonic meters, but that's clearly not the right length for 433MHz. I first used a 1/4 wave whip, which I used to cut 22 gauge wire, and there was -27 to -40dB between my two transceivers. I bought 2 of these, changed whips and got -80db to -90db in the same range. I thought I screwed something up, but I bought 2 different antennas off Amazon (a duck and a set of coils) and immediately saw a 30-40dB signal increase.