ok so ive been going back and forth on this for a few weeks now and figured id just ask because i keep reading conflicting stuff online. currently running a simple 40m dipole at about 25 feet, fed with RG-8X into an MFJ-949 tuner. works ok, gets me on the air, but my neighbor has a vertical (i think its a Hustler 6BTV or something similar) and he consistently seems to punch through pileups better than i do on 40 and 80.

now i know 25 feet isnt exactly ideal for a 40m dipole — youre supposed to be at like a half wavelength up for it to really sing, which would put me at 66 feet and thats just not happening with my HOA situation. so im wondering if a vertical with a decent radial field would actually outperform my low dipole for DX, or if im just seeing confirmation bias because my neighbor runs more power. he has an IC-7300 and im on a 100w Kenwood so that shouldnt be a huge difference.

has anyone actually done a side by side on this or is it just too situationally dependent to make a general call

short answer: low dipole vs a vertical with good radials, the vertical usually wins for DX on 40m, yeah. a dipole at 25ft on 40 is basically a cloud warmer — most of your radiation is going nearly straight up which is fine for NVIS and regional stuff but for working europe or japan you really want a lower angle.

the 6BTV is a decent antenna if hes actually got a good radial system under it. a lot of guys throw one up with 4 or 5 radials and wonder why its underperforming but if he took the time to lay out 30-40 radials at least 0.2 wavelengths long then yeah it will likely beat your low dipole for DX every time. the flip side is verticals hear more noise in a lot of suburban environments, so you might actually have a better receive situation even if you cant quite match him on transmit.

if you cant get the dipole up higher, maybe look into an inverted-V configuration if you can get the apex up higher than the ends. still not perfect but better takeoff angle than flat-top at 25ft.

yeah this is one of those things that depends so much on your specific location and ground conductivity that its kind of hard to give a definitive answer. i spent like two seasons A/B testing a low dipole against a vertical at my old place and honestly it was pretty situational — the vertical crushed it for long path DX but the dipole was noticeably quieter on receive, like 2-3 S units sometimes.

one thing nobody mentions is that if your ground conductivity is poor (which it is for a lot of suburban lots) the vertical suffers more than people expect even with a solid radial field. theres a guy on the DX engineering site who did some modeling on this and the numbers were kind of sobering for vertical enthusiasts. anyway not saying dont try it, just that its not a guaranteed win over the dipole necessarily