so ive been doing contests pretty seriously for a couple years now, mostly single band stuff on 20m and 40m, and i keep reading about SO2R and how the top guys are running two radios simultaneously and racking up insane rates. i get the concept but i honestly cant wrap my head around the logistics without actually sitting down and trying it.

right now my rate peaks around 120-130 on a good run hour during something like cqww phone and then just falls off a cliff when the band shifts and i have to go searching. im thinking the second radio is mostly for hunting mults while youre running on the first one? like you keep a run frequency on radio 1 and use radio 2 to work a mult real quick and come back. is that basically it or am i oversimplifying.

the other thing is the antenna switching and audio routing gives me a headache just reading about it. i have two transceivers already, an ic-7300 and an older ft-1000mp that i keep around, so hardware isnt totally out of reach. is it even worth the effort for a guy doing maybe 4-5 contests a year or is this one of those things where you need to be putting in 20+ hours a weekend to justify the complexity

yeah you basically have the concept right -- run on radio 1, hunt mults or fill in the S&P gaps on radio 2. but the real gain isnt just the mults, its that dead time between callers. even in a good run there are gaps where youre just waiting and if you can throw out a call on radio 2 during those 3-4 seconds youre compressing a lot of wasted time over a 24 or 48 hour period. the rate difference between a clean SO2R operator and a single radio guy adds up more than you'd think.

that said the 7300 and the 1000mp combo is a bit of a mismatch for SO2R because youre going to have a harder time getting them to talk to the logging software in sync. N1MM handles it but the bandmap coordination works way better when both radios respond similarly to CAT commands. the 1000mp can be a little quirky. the bigger issue honestly is the antenna situation -- if youre transmitting on radio 2 anywhere near the frequency radio 1 is listening on youre going to either blow a preamp or just hear nothing but splatter. you need either really good bandpass filters or separate antennas for each band and that gets expensive fast. for 4-5 contests a year i'd say get your single radio game dialed in first, work on operating discipline, and maybe try SO2R for real during a low-stakes contest just to feel it out before committing to the filter investment.

honestly the antenna isolation thing is what kills most people's first SO2R attempts. i tried running my tribander and a 40m dipole together and thought the physical separation would be enough -- it wasnt, not even close. you really do need those band pass filters if youre going same-band SO2R and even for different bands the second harmonic thing can bite you depending on the combo. 4O3A or the ICE filters are the usual recommendations but yeah not cheap.

one thing i'd add is that even without going full SO2R, just having the second radio sitting there on a different band in receive-only while you run can help a lot with timing your band changes. you can hear when 15 opens up before you abandon your 20m run frequency. thats kind of SO2R lite i guess and the setup complexity is way lower since youre not transmitting on it.