[sdiy] Tube signal conditioner ?

[metasonix at earthlink.net]

>i am on the quest for some kind of Schmitt-Trigger or
>Comparator that allows me to clean up a possibly noisy
>signal to an exact 0/1 level.
>So, i want to make some kind of "hard switching", by means of a tube.
>How can i achieve this ? OK, i have the schematics of that old philbrick
>tube opamp, and could use it as a comparator, but i feel there must be
>a more simple solution for that.

You just described one of the functions of the Metasonix TM-1....
the pulser circuit, to be precise.....





E. Barbour
metasonix