so i've been dabbling with SO2R for probably three years now and honestly for the first two of those i was doing it wrong in a way that was actually hurting my rate compared to just running single radio. kept getting confused between the two ears, messing up the timing, sending on the wrong radio, you name it. WRTC guys make it look easy but man it is not.

what finally made a difference for me was forcing myself to only do SO2R during the slow periods at first - like not even attempting it during a good run. just use the second radio to S&P while the run radio is doing its thing between QSOs. sounds obvious in retrospect but i was trying to go full tilt from the jump and it was a disaster. get comfortable with the audio switching first before you even think about crazy interlocking stuff.

also, and i cant stress this enough, the antenna isolation question is way more important than the software side of things. i spent so much time configuring N1MM and the SO2R controller and not enough time actually thinking about whether my 40m dipole was going to blow up my 80m receiver when i was transmitting. getting the bandpass filters sorted out was honestly the bigger unlock.

anyone else gone through this kind of learning curve or is it just me being slow on the uptake? curious what other people found was their breakthrough moment with it

yeah the antenna isolation thing trips up a lot of people and nobody really talks about it until something gets smoked. i blew a preamp on my second radio the first time i tried SO2R without proper filtering, lesson very much learned. i run the 4O3A bandpass filter set now and the difference is night and day - you can actually transmit on one radio without the other one going deaf.

on the rate optimization side, one thing ive found really useful is pre-filling the exchange in N1MM before the QSO even starts if you're running. sounds like a tiny thing but when youre doing 150+ an hour every second matters. also learning to trust the dupe checking and not second-guessing it mid-run costs you way more time than you'd think. just log it and move on, sort it out after if something looks weird.

the audio splitting thing took me a long time too. stereo headphones with one band in each ear works for some people, drives others crazy. i went back and forth for like two contests before settling on doing a mono mix with just a slight pan difference so i can tell which radio is which without it feeling like my brain is being split in half

I'm nowhere near SO2R territory yet but the rate stuff is interesting even for single radio. been trying to figure out when to abandon a run and go S&P and i still don't have a good feel for it. like i'll be on a frequency, rate drops off, i know i should move but then i stay too long because i think it'll pick back up. costs me probably a couple hundred points a contest just being indecisive about that.

someone at my club said the rule of thumb is if you've gone more than two or three minutes without a QSO during a period where the band should be open you should probably either move frequency or switch modes but i dunno if thats actually right or just one persons opinion