3 ms·
400v? what that what your mains was packing?
by quickthrower2 3y ago
400v? what that what your mains was packing?
- mnw21cam 3y agoThermionic valves require a high voltage, because their principle of operation is accelerating electrons across a vacuum.
- jacquesm 3y agoJust a rectifier and a cap and you're there from regular household current (not safe without galvanic isolation!!). But with a simple transformer you can go way higher. Some of the end stages on tube systems I had when I was a kid would sit at 500V when idling (EL44). Usually as soon as you see a tube with a cap on top you know you have something pretty high voltage.
- franky47 3y agoNo, mains runs at 230V in Europe, but as said by sibling comments, after the power transformer and rectification, HT1 (the primary high tension power bus, usually feeding the tubes in the power section) can get in the 300-500V range in some amp designs. I knew from schematics and calculations it'd be about this high, but seeing the actual 400V value on my cheap multimeter sent shivers down my spine. Also I remember accidentally shorting the wrong wires while taking a measurement and blowing a fuse. Fun times!
- jacquesm 3y agoWait until you touch a live anode, that will send shivers down your spine ;)