[sdiy] Check-valve ladder filter

[Tim Ressel]

So like, the 6AL5 version is filtering! And its
voltage controlling!

I had some wierdness with my Heathkit IP-32. It was
powering the filaments with 6.3VAC. I was getting
voltages on my chain that were higher than Vcc!!
Switching to a DC source for the filaments fixed the
wierdness.

My expo current source isn't putting out enough
current, but thats easy to fix. Also the ladder isn't
balanced, and the balance control i have doesn't have
enough swing to compensate. I'm not sure how important
it is to have the thing balanced.

Onward!!

--TR

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Tubes and ladders and filters, oh my!
Tubes and ladders and filters, oh my!
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