47 tube [message #8415] |
Tue, 24 August 2004 22:46 ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
West Valley Joe
Messages: 11 Registered: May 2009
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Chancellor |
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I posted about 47 tubes in SET by mistake. Colin Hester showed some schems so there might be some interest here.
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Re: 47 tubes are nice [message #8418 is a reply to message #8417] |
Sat, 28 August 2004 21:20 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
metasonix
Messages: 103 Registered: May 2009
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Viscount |
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>Would a UL circuit be my best bet? I doubt you could use them UL and get decent power. The max rated screen voltage is 250v, and even with a 250v plate supply, a UL amp would exceed that on the screen on every positive half-cycle. Unlike EL34s or EL84s, they weren't intended for ultralinear circuits. Gary always ran the screens from fixed DC, and even though he was running 330v, the tubes were stood off ground for direct-coupling, so the screens were always within rated operation.
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Re: 47 tube [message #8422 is a reply to message #8419] |
Sun, 29 August 2004 18:29 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
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Wayne Parham
Messages: 18757 Registered: January 2001
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Illuminati (33rd Degree) |
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Hi John, I'd like a copy of that article too please. I have a few spare 47's and a couple radios I've restored that use them. Thanks, Wayne
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