[gvel]

My TRF buzzed horribly, until I added line filter caps. Here's a good read:

<!-- m --><a class="postlink" href="http://www.justradios.com/safetytips.html">http://www.justradios.com/safetytips.html</a><!-- m -->

If you don't have a "safety" cap handy, use whatever you have of correct value and at least rated a 630V. If this solves your problem, order some safety caps and change out the temps.