TVantenna-good tv reception except when the electric buses go by my apt bldg-any suggestions?

Sigh, it's important to read the question before answering.

I read the question. Static electricity can come through the supply voltage as well as through the antenna when the vehicle passes through the elecreo-magnetic field of the transformer that feeds your house. Those transits can be filtered via an isolation transformer. Broadband radio frequency (RF) interference can't be filtered because it covers the entire TV frequency spectrum, transmitting on the same frequency as the local TV station.

http://en.wikipedia.org/wiki/Electromagnetic_interference

Thanks for clarifying. Not sure how to check since I don't get service at all if antenna is disconnected.

The static from the passing vehicles should have a different sound and intensity and show static on the screen than what is normally there with no antenna. With the antenna disconnected, if you see one of the electric vehicles pass and the audio and video changes as described, an isolation transformer will remove that. If there is no difference in the audio/video it is RF interference and the transformer wouldn't work.

If it is RF interference you can file a complaint with the FCC if you are in the US.

http://www.fcc.gov/complaints