I figured a Proton Pack would take me a few months to build and is a bit pricey with a housing move in the works. There was a tossup between a Trap and a Gizmo. The Gizmo seemed like the easiest thing for a first build.
I am looking at modifying Doug’s build and adding a speaker to the board. I am not sure if I am going to attach it to the back of the board, to the daughterboard thru the connecting cable, or hide it under the ICs. My plan is to have the speaker wired to the last Nixie with a switch (im sure the sound will eventually become annoying). With the speaker wired to the last Nixie, I will have a steady beeping that will be synchronized with the pulse of the tubes to sort of emulate the PKE Meter. I am trying to figure out a way to make an override for the POT so that I can control it from an external lead without touching the board. This is going to be a fun build.
Belt Gizmo: ... http://www.gbfans.com/community/viewtop ... =7&t=37976
Belt Gizmo Video: http://youtu.be/EhvytMEejLQ