Power Supplies for Tube Circuits.

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Article #17703

#17703

From: dvadura
Date: Thu, 02 Jul 1987 02:32

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	I'm working on building a small audio pre-amp using a 12AX7 type
tube.  I'd just like to experiment with some old-style technology.  It's
been suggested that I could obtain the less than 330 volts needed by
directly rectifying the line current and putting it through a voltage
doubler, eliminating the power transformer.  This could reduce the cost
of the thing quite a bit *iff it's a safe (for both me and my toys)
thing to do*.  Are there any experts out there who'll expound on the
wisdom (or lack there of) in eliminating the power transformer?  I'll
definitely put one in if there's any doubt.

Thanks.

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!rose!dvadura
From: dvadura@rose.UUCP
Newsgroups: sci.electronics
Subject: Power Supplies for Tube Circuits.
Message-ID: <12887@rose.UUCP>
Date: Wed, 1-Jul-87 22:32:37 EDT
Article-I.D.: rose.12887
Posted: Wed Jul  1 22:32:37 1987
Date-Received: Fri, 3-Jul-87 06:31:26 EDT
Reply-To: dvadura@rose.UUCP (Dennis Vadura)
Distribution: na
Organization: U. of Waterloo, Ontario
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