Has your amp ever pickup up a radio station?

[baronedo]

It happened with my Marshall valvestate amp a few years ago when we practiced at a certain friend's house. He lived very close to a local radio station. We couldn't figure out how to stop the radio reception. One day I changed my preamp tube to a different model (a Chinese model recommended by Myles to give a warmer tone). After the preamp tube change, the radio reception problem went away. I aked Myles about it and he wasn't surprised with the outcome - I believe he said it had something to do with tube microphonics??