so ive been doing contests pretty seriously for the last couple years, mostly single op on 20 and 40, and i keep reading about SO2R and how the top scorers basically all run it. im starting to wonder if its actually worth building out a second radio setup or if im just chasing diminishing returns at my skill level.

my rate right now is pretty decent when the band is hot, im running a k3 into a 3el yagi on 20 and usually manage somewhere around 120-150 qso/hr when the run is good. but then the band shifts or gets quiet and i just sit there spinning the dial on the same rig while the clock ticks. i guess thats where the second radio comes in — you're supposed to be S&P on one while you're running on the other.

the part that confuses me is the station management side of it. like how do you actually handle the audio from two radios at the same time, do people really just stereo split with one radio in each ear? and the bandpass filter situation for keeping the two rigs from blasting each other seems like it could get expensive fast. anyone whos actually done the transition from single radio to SO2R, was it a gradual thing or did you just go all in?

yeah the stereo audio thing is exactly how most people do it, left ear on run radio right ear on the mult/S&P radio. takes a while to get your brain to sort it out but honestly after a few contests it starts feeling pretty natural. the bigger issue early on is accidentally transmitting on the wrong radio which... dont ask me how i know thats a problem lol.

the filter situation depends a lot on your antennas and how much band separation you have. if youre running same-band SO2R thats where it gets brutal and you really need the rx filtering sorted properly, but if youre just doing like 20m run and 40m search and pounce the isolation is usually manageable without going full SO2R filter box immediately. i started with just a dueling cq setup on two different bands and it was a big improvement over what i was doing before, like maybe 15-20% more qsos in a typical cw sweepstakes.

whether its worth it really depends on how serious you want to get. if youre competing in a regional or trying to place in your call district then yeah it moves the needle. if youre just having fun and happy with a respectable score it might be more stress than its worth honestly.

the bandpass filter thing doesnt have to kill your wallet if you build them, there are kits out there and the W3NQN designs are pretty well documented. i built a set for like 80 bucks in parts and they work fine for my station. the expensive ready-made ones are nice but not required to get started.

one thing nobody really talks about enough is the logging software side — make sure whatever youre using actually has solid SO2R support with the radio switching keyed to the right port or youll drive yourself insane. n1mm handles it well but you gotta set it up right before the contest not at 0001z when everything starts.