ok so bear with me because im not entirely sure whats going on here. built a 5 inch freestyle quad last month, running a Walksnail Avatar HD system for video and ExpressLRS 2.4ghz for control link. control link is totally fine, havent had a single issue there, but the Walksnail video feed starts breaking up and going to static at around 80-100 meters which is honestly embarrassing for a digital HD system.

the VTX is set to 25mw because im flying at a local field that has other pilots and i dont want to stomp on everyone but even so 80 meters seems way too short. antennas look fine visually, i reseated them last night. goggles are the Avatar goggles X version. not sure if i wired something wrong or if there's something obvious im missing, ive been building for about 8 months so im not totally new but still learning.

oh also the quad is a 5 inch on a generic frame, stack is a speedybee f405 v3 if that matters at all

25mw is definitely part of the problem but shouldnt cause dropouts at 80m on Walksnail unless something else is wrong. first thing id check is whether the VTX antenna is actually making solid contact, not just visually but give it a very gentle wiggle while watching the signal indicator in the goggles, ive had connectors that looked totally fine but had an intermittent connection inside. second thing, and this catches people out a lot, check that the VTX isnt thermally throttling. if its tucked inside the frame with no airflow some of these units will drop power output when they heat up and you wont necessarily get any warning about it. try a bench test with a fan blowing on it and see if the range improves.

honestly Walksnail at 25mw is just not great in my experience, like its fine for a small park or a tight course but if youre anywhere with any RF noise its going to struggle. bump it to 200mw and see what happens, if other pilots at your field are running DJI or HDZero youre all on different frequencies anyway so 25mw is probably overcautious. also are you running the latest Walksnail firmware because there were some pretty significant link stability improvements in a few of the recent updates that made a noticeable real world difference