Hi Guy!
David Shannon probably is hanging out around Tucson right now, but normally
he can be found at:
David Shannon
6649 E. Rustic Dr.
Mesa, AZ 85215
602-985-0557
He is selling the Russian Geiger-Muller counters with LCD displays for $37.50,
which is great even if the instruction manual is in Russian. David provides a
rough translation of the basics from the documentation. Shannon also charges a
few dollars for shipping and handling, but I don't know how much.
I have a radiation monitor that I built from a Heathkit kit some years ago.
It's quite beat up now–the beeper and LED don't work any more, but it has a
good analog display. I also use aware software with my laptop, which is very
sensitive but doesn't respond quickly. (It turns the cpu into a counting unit,
which cpus do very well.)
Nathan