wrote in message
ups.com...
I've been hearing how winding coils on discarded plastic pill bottles
is not suitable for RF tank circuits due to low Q, and that these would
not be safe for tube circuits anyway due to melting point.

What frequencies are your coils going to be operating at? I'd be really
surprised if pill bottles had any significant loss at HF.

You must be talking pretty high power designs if you're able to melt plastic!