Quote Originally Posted by Chuck View Post
Great informative post Doc, especially as I'm about to embark on building a tube amp for the first time ever. I'm using a kit from Valve Heaven - the Lamington Junior that uses a 12V plugpack to minimise the risk of higher voltages that a rookie like me could encounter. Should be interesting...
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...