[sdiy] Fire bottle ladder filter

[Tim Ressel]

Update: 

With 100V at the top of the ladder, I can squeeze
about 1mA thru the ladder before nasty distortion sets
in. Its more intense on one side of the ladder, so I
suspect a bad tube. Not in possession of a tester, I
have arranged for new tubes to be delevered to the
dungeon where I carry out my diabolical schemes.
Probably take a week or two to get them.

Currently (pun indended) the max cutoff is about 1KHz.
I can juggle cap values, but I'm waiting to resolve
the tube issue before proceeding.

Meanwhile I think I'll build the transistor version to
get acquainted with its performance.

I'll have a diabolical schematic ;-> of the tubular
version as soon as I convince Orcad to draw something
as old as tubes. Anybody know of a tube library for
Orcad??

--TR

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Laughing maniacally while touching B+
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