How A Valve Guitar Amp Works.

[Chuck]

I've been thinking about doing similar and have looked at those amps. I don't understand how the 12V plugpack option really makes it any safer. Sure you don't directly need to connect anything to the mains, but the first thing in the circuit is a transformer to convert the 12VAC to 240VAC to bring the voltage back up to generate the +270VDC high tension supply...

Good point Dan, not that I have any real understanding of these things! Have you seen the weekend courses that Grant at Valve Heaven runs? Two days, $500, kit supplied and supervision! He's based in Adelaide too these days. I used him years ago when he was in Sydney to service an SWR Baby Blue amp I have and he's a really good guy.