so ive been running SO2R for a couple years now mostly on the bigger contests like SS and CQWW but lately i've been wondering if the setup overhead is actually worth it for the shorter sprints. like the NA Sprint specifically. the rate swings are so violent in that contest that by the time i've got the second radio tuned up and locked in on a run freq i feel like i already missed 3 or 4 QSOs on the first radio.

my current setup is a K3 and an IC-7610 going into a DX Engineering NCC-2 and a bandpass filter stack from 4O3A. interlock is handled through a microHAM SO2R box. it all works fine, the interlock is solid, no RFI issues i can hear anyway. but the cognitive load during a sprint just feels different than a 48 hour contest where you have time to settle into a rhythm.

anyone who actually runs SO2R in sprints have any tips or is this one of those situations where the juice isnt worth the squeeze and i should just focus on rate on radio 1 and use radio 2 for band checks only

honestly for sprint i barely bother with true SO2R anymore. what i do now is use the second radio strictly as a bandscope and a place to park a frequency while im running on R1. like ill be running 20m, see a pileup forming on 15, note the freq, finish my current run freq if its still going, then jump over. its not real SO2R but it keeps me from missing band openings and the mental overhead is way lower.

the problem with full SO2R in sprint is exactly what you said — the contest moves so fast and the QSY rules mean youre constantly having to rethink who you can work where. i tried going full SO2R in the SSB sprint a few years back and my rate was actually worse because i kept fumbling the transitions. maybe if your station is set up with footswitch interlock and dedicated audio switching it gets easier but i never got there.

rate optimization in sprint is really about mastering the search and pounce to run transition more than anything else. SO2R helps but only if you already have that dialed in. if youre hesitating at all on when to grab a run frequency youre going to lose more than you gain from having the second radio in the mix.

one thing that helped me a lot was logging software automation — i use N1MM+ with the bandmap set pretty aggressively so dupes get flagged instantly and i can see multiplier status at a glance without thinking. that freed up enough brain cycles that SO2R felt less overwhelming. still wouldnt say sprint is the ideal contest to learn SO2R on though, probably better to get the flow solid on a 48hr first