[sdiy] tube ladder

[Tim Ressel]

--- metasonix at earthlink.net wrote:
> What do you mean? True, a typical small signal tube
> cathode is only good for 10-20 mA at charge limit.
> They can go down into microamps, even tenths of
> microamps,
> before leakage currents are a problem. Circuit
> layout,
> tube socket insulator material, and other things
> affect this.

Perhaps pentodes can do this, I could not get triodes
or diodes to go down that low. They jept going into
cutoff and getting real noisy.

I found a very old circuit for a noise limiter. It
used pentodes as varaible capacitors!! Ic conjunction
with inductors, a VCLPF was made. With the high
impedances involved, this is a possibility.

-tr


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