Ok, I don’t claim to understand everything associated with RF. Heck, there’s a lot of it that’s just plain over my head (pun intended).
But this particular surprise has me totally baffled. I was several new dual commercial band antennas that I just received in case any tuning was needed and since my mind was set to “dual band” mode I grabbed this inexpensive, lightweight, low power antenna and connected it to one of the Dakota Alert MURS 2 watt base units and decided I should check it also. I don’t mind telling you I couldn’t have been happier with my SWR reading, 1.0-1.1 right out of the package. I had a HUGE smile and thought perfectly, finally found an antenna that needed no tuning, not even a frogs hair amount needed to be trimmed off. I went back to testing the other dual band commercial antennas with several different mobile radios and it wasn’t until I finished and started putting my meters, adapters and various odds and ends away that I realized what I had done. I had connected a UHF only (433 MHz specific) antenna to a VHF transceiver, not only that but I got a picture perfect SWR & power level reading using it n a MURS channel (154.570).
My radio tech ALWAYS stressed that I should only use band specific antennas for the band they were designed for and by using a VHF on UHF and visa versa, So, why is this UHF antenna working spot on with a VHF frequency ? I have included a pic of the antenna I’m referring to.