I am new to amps not new to tubes radio and tube test equipment. I have been using 300v wire salvaged from old pc power supplies for several years. I haven't had any issues so for. Is it OK for tube amp use? Im thinking most of this vintage tube gear wouldn't have wire that would pass for 600v by today's standards and many people still use them today. Also solid vs stranded. 20awg for power and 22 for signal and audio wires correct?