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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Thoughts on doubler supply straight out of wall no transformer 450V caps.??? posted by -3db on September 16, 2002 at 00:55:06:
Definitely insane.The chassis will be hot with line voltage if the plug is reversed. 50/50 chance of electrocution risk - Russian roulette with three bullets. If you use a "full wave" doubler, it'll be hot with EITHER orientation. - six bullets! So your CD player or other input will become hot too. The TVs and radios that were wired like this weren't meant to be hooked to anything - all metal was enclosed, where it couldn't be touched.
Steve Bench has a SAFE line operated amp circuit on his site, using an input transformer for isolation. http://members.aol.com/sbench101/
You can also buy a 50VA isolation transformer (enough for SE 6BQ5s) for $17 from Allied, a 100VA one for $26. Surplus is much less. Or check the circuit on my site, using a $30 toroid.
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Follow Ups
- Re: Thoughts on doubler supply straight out of wall no transformer 450V caps.??? - Tom Bavis 05:19:50 09/16/02 (0)
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