| Re: 47 tube [message #8426 is a reply to message #8425] |
Mon, 30 August 2004 10:02  |
Manualblock
Messages: 4973
Registered: May 2009
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Illuminati (13th Degree) |
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No Hurry, enjoy! I am building a new pre-amp now so the Transmitting tube amp is still on hold. I am thinking I may go with a schematic I have from this guy in New Zealand who has built one. It's a copy of a circuit that ran in AudioExpress a few yrs. ago.
It uses regulated DC on the 211 filaments An IC regulator drives an NPN pass transistor. The tube requires 10.25v/3.25a DC on the Filaments.
AC on the driver/input filaments.
The High voltage side uses 900-0-900 200ma full wave cap input supply.
Thats what I am chewing on now, well see.
I should have the 47 tube info out this evening I just have to hook up the scanner. That looks like a nice little DC SE amp. Lots of fun.
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