Very interesting. So Beck's a fan! Has he ever done anything other than Surf's Up as a tribute to Brian's work, any live/studio covers or anything? Do you think Brian was listening to any Yardbirds stuff at that point? I don't think so.......but who knows.
I have to look into that, because I think Surf's Up may be the most popular example but I'm guessing he may have done more in the last 40 years. Beck covers music he likes, and if he covered Surf's Up of all things he has to like others from Brian enough to try them out!
By default Brian would have heard the current Yardbirds releases because the Beach Boys and the Yardbirds (Jeff Beck era) were on the same radio playlists, at least in Los Angeles. It's strange that the Yardbirds' playlist on "oldies" formats since at least the 90's has shrunk to maybe 3 songs at best, while they were getting much more airplay in the mid 60's. When is the last time "Over Under Sideways Down" was played on a commercial oldies station?
It was surprising to see The Yardbirds getting so much press, especially from LA's station KRLA. They were featured in article after article, and even Jeff beck got a few interviews of his own at that time. So they were part of the popular scene on top-40 for sure, right next to Beatles-Beach Boys-Stones etc. They just didn't last as long so they get nudged out of that scene's history. And KHJ, where Brian would sometimes hand-deliver his latest single for airplay, had the Yardbirds strong on their playlists, and by strong I mean they got airplay with singles that are all but forgotten today, except for diehard fans.
Brian definitely would have heard Beck's playing with The Yardbirds if he was tuned in to KHJ or KRLA radio in LA, 1965-67.