so i finally pulled the trigger on an ubitx v6 kit after probably six months of just reading about it and watching youtube videos. got it all together over a weekend and honestly the build wasnt as scary as i thought it would be. i did manage to solder one connector backwards the first time but caught it before i powered it up which was lucky.

first contact was a guy in ohio running 5 watts on 40 meters and i was just blown away that my little box with like 8 or 9 watts actually made it. i know thats not some crazy DX or anything but for me sitting there with something i actually built it felt pretty significant. been a ham for about 2 years now and mostly just did voice on VHF so getting into HF and especially CW-capable rigs has been a whole new world.

anyway my question for anyone who's been doing QRP for a while — is the jump from 5 watts to even 10 watts actually meaningful or is it kind of pointless to chase those extra few watts when i could just focus on antenna work instead. i keep reading that antenna is king but also feel like i dont fully understand where the efficiency gains really come from at these low power levels

oh man that feeling of making your first contact on a rig you built yourself is something else entirely, i remember mine and it still makes me smile thinking about it.

on your question about watts — the short answer is antenna is almost always going to give you more bang for your buck than doubling power. the math works against you a little: to sound twice as loud to the other station you need roughly 10x the power, which is why going from 5 to 10 watts is only something like 3dB which the other guy might not even notice depending on conditions and noise floor on his end. a better dipole or getting it higher off the ground can easily get you 6dB or more just from geometry. that said 10 watts versus 5 watts does add up over long operating sessions where you might be trying to break a pileup or working weak signal stuff, so its not nothing. but if i had to pick one thing to spend time on i'd put the effort into antenna work every single time. whats your current antenna setup?

i built the same kit last year, the backwards connector thing happened to me too lol. mine was the audio jack i think. congrats on the first contact though, 40m with QRP can be surprisingly great when conditions cooperate. i mostly take mine out portable now, just a little backpack setup with a linked dipole and a small lipo battery and it's honestly my favorite way to operate. way more fun than sitting in the shack for some reason