I have a set of John's speakers as well.
What you want is a good regulated power supply.
John had me researching the Tungar phenomena a while back, and what I can tell you about that is that Tungars can't be properly bypassed (IOW, properly filtered) enough to eliminate hum. This means that they aren't going to sound right and will introduce a coloration (and distortion- intermodulations based on the hum frequency). So the Tungar craze is a bubble that's going to pop.
Really, a good regulated power supply is the key. The thing is, it needs to be several amps at least, so you really can't do it with tubes. Actually the power supplies John supplies with the speakers work really quite well. I think they could look a bit nicer, but that's a different story...
What you want is a good regulated power supply.
John had me researching the Tungar phenomena a while back, and what I can tell you about that is that Tungars can't be properly bypassed (IOW, properly filtered) enough to eliminate hum. This means that they aren't going to sound right and will introduce a coloration (and distortion- intermodulations based on the hum frequency). So the Tungar craze is a bubble that's going to pop.
Really, a good regulated power supply is the key. The thing is, it needs to be several amps at least, so you really can't do it with tubes. Actually the power supplies John supplies with the speakers work really quite well. I think they could look a bit nicer, but that's a different story...