"Andy Evans" wrote, inter alia in
uk.rec.audio1136728488.256657.197600@g49g2000cwa. googlegroups.com

I'm looking for a build-it-yourself option for a lead acid battery
charger. Must be able to charge 6v batteries, and preferably 4v and 2v
as well (when I find some - anyone know suppliers in UK???). Features
I'd like a
a) Switchable between one pair of batteries in use and another on
charge, so I have permanent charge

Just to be utterly irreverent, if not entirely irrelevant, dear Andy;-
http://tinyurl.com/87ha9

There's definitely a valve background ... I had to drag the above out of my
bookmarks, and found the page no longer existed, hence archive.org and the
wayback machine as an aside, there's a *lot* of great live music at
archive.org which I look forward to when I have a broadband connection for
the above link, but a little searching shows that some pages are still live -
IIRC there were valve amps used in the Stubblefield research, and he made
audio amps as well, before turning to the 'free energy' thing ... large pages:

http://www.icehouse.net/john34/intro.html
http://www.icehouse.net/john34/stubblefield.html

I don't have time or connection speed to look through these again right now.
Or to find the amplifier pages I remember seeing earlier. Still, enjoy;- or ?

But it occurs to me that audiophile cable arguments pale in comparison ;-
--
RdM

"Mark, read, learn, and inwardly digest"