found this on the net, seem's like a good one for someone to start with tube's/valve's, no high DC voltage's,
[IMG]http://i81.photobucket.com/albums/j236/w124-2door/radio%20amps/Space-charger_500schematic.gif[/IMG]
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I am put off high voltages so like the look of this.
I have had a go at the valvecaster preamp at 9v and 12v using the 3 valves 12AU7, 12AT7,12AX7 valves and using it as a preamp for a solid state amp and it sounds really good. It eats up batteries but I picked up a huge box of 4.5v batteries off eBay so it will take a while to use these up. I tried a really cheap plug adapter and it was dire even with an anti-hum filter circuit.
The links to it are here
http://www.beavisaudio.com/projects/ValveCaster/
http://www.diystompboxes.com/smfforum/index.php?topic=63479.0
david, amp transformer's, the only one's i've bought are old one's off ebay, and the one's in old valve record player's, radiogram's etc, i bought for part's, never bought a new one yet, not that i would'nt if they were cheap enough, i'm still a newbie at this valve stuff, i'm sure someone more knowledgable will chime in about your hum issue, GH
wonder if a car batter charger could be used for the power supply,??