I want to make a crowbar circuit to help reduce overvoltage problems on my TS-940. I came across the NTE component "7172 8-Lead DIP", but I can't find clerification on what pins to connect to what part of the circuit. Now I know this is bound to bring some criticism, but I want to use the NTE circuit as opposed to what has been common place. I can't get NTE to cough up any sample diagrams.
My guess is the Vcc, pin 1, will go to the 28.5 vegulator 'out' and the Vee to ground (this is a positive voltage supply). I believe the Drive Output , pin 8, should be connected to the trip leg of the SCR and the Sense 1 leg, pin 2, to pin 1 of the IC (short pin 2 to pin 1) with the idea that if the regulator out changes more than 2.6 volts, pin 8 will send the drive signal to the SCR and pop the in-line fuse. I thiink there is an internal zenier creating a reference voltage for which the Sense inputs use, or maybe that was a bad dream.
Anyone willing to put their expertise on the line?