so ive been doing single op contests for a few years now and my rates are... fine i guess. decent multiplier hunting, i can usually hold a run frequency pretty well on 20m but i feel like im leaving a ton of points on the table when the band is slow and im just sitting there calling CQ into the void waiting for the next contact.

been reading a lot about SO2R and i get the basic concept — radio 2 is for S&P or mult hunting while radio 1 holds the run — but in practice i genuinely dont know how people manage the cognitive load. like do you just get used to it after a few contests or is there a period where it actually tanks your score before it gets better? my buddy K8 something (cant remember his suffix) says it took him three or four major contests before it clicked and he stopped doubling on his own signal.

also the filtering situation seems like it could get expensive fast. running two radios in the same shack without trashing each others front ends seems like it requires either a really solid bandpass filter setup or just accepting you cant transmit on both at the same time which kind of defeats the purpose on the same band i guess. anyone running a two radio setup on a budget that actually works? or is this one of those things where you really do need to spend the money to do it right

the cognitive load thing is real and i wont sugarcoat it. first couple contests i tried SO2R i was a mess, blew exchanges, lost my run freq twice because i wasnt watching it, the whole deal. but honestly around contest number three something just clicked and now running S&P on radio 2 while holding a frequency on radio 1 feels almost automatic. its like driving stick, you stop thinking about the clutch eventually.

on the filtering question — yeah you do kind of need to spend some money if you want to do it properly. the 4O3A or dunestar bandpass filters are the usual go-to and they make a massive difference. i tried it cheap first with just some extra separation and a good antenna switch and it was workable on different bands but same-band SO2R without proper filtering is basically asking for a bad time. there are guys who run two radios on separate antennas pointed different directions and claim it works OK but ive never tried that personally. if budget is the issue i'd honestly say start with two radios and just run them on different bands, get the workflow down before you worry about same-band operation. the rate improvement even from just mult hunting on band 2 while you run on band 1 is pretty significant once you get comfortable with it.

one thing nobody really talks about with SO2R is the keyer and audio routing setup being half the battle honestly. if you dont have your audio sorted so you can actually hear what radio 2 is doing without blowing out your ear or missing your own exchange on radio 1, the whole thing falls apart. i run a headphone mixer and it took me longer to dial that in than it did to set up the bandpass filters. N1MM has decent SO2R support built in now so that part at least isnt as painful as it used to be but you still gotta configure it properly or it'll fight you the whole contest.