Replaces main board on many different Bicron model  #'s/

This is a new main board for a 3 range Bicron Geiger Counter. It can be easily converted to a single channel analyzer by adding two controls instead of the factory selected fixed resistors, to set the threshold and window functions.

It may also be possible to add a 4th range switch position as there is a place for the control on the circuit board.

Schematics provided.

The KIT contains the new circuit board,  new rotary switch and knob. Use with any 1 milliAmp meter movement or add your  digital readout.

The user must assemble the kit into an enclosure (not provided) and add a 9V battery and clip, two toggle switches, a probe connector of his choice and speaker of his choice (not included).


This is the main circuit board from a Thermo- Bicron handheld professional Geiger Counter.

The boards are new old stock, all assembled so far work fine, some minor repair due to handling may be required.


INSTRUCTIONS AND DATA LINK:


http://www.qsl.net/k/k0ff///Bicron KIT/1 EXACT 6 POT BOARD KIT

Schematic reading and soldering required. This is not a step by step kit, rather a kit of parts.