Ever since the weather has consistently stayed around 20-30 degrees, I've been struggling to find the source of a whistle in my car that was occurring around 30-45 MPH. It sounded like it was coming from the top of the passenger side B-pillar, so I had been focusing on that area, dismounting and mounting the weatherstripping and visually inspecting it but finding nothing.
Well, today I needed to pull into the garage for an unrelated issue so I had to take the antenna off, and when I drove off I forgot to put it back on and was astonished to find that the noise had vanished!
I'm not sure if the whistling is simply due to the fact that I'm pushing a three foot steel rod through the dense winter air, or if it's because of the plastic matching coil in the middle.
My solution will probably be to just deal with it or run CB-less until it warms up. There's been very little police activity lately and I haven't been venturing off of my familiar routes anyway.