Search found 12 matches

by Chronosock
Wed Nov 07, 2012 1:05 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Yea sorry, been swamped with physics and calculus homework, should be updates sometime this weekend.
by Chronosock
Fri Oct 12, 2012 10:12 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Pin 4 remains at battery voltage before and after shorting pins 3 and 8. TP2 is extremely erratic both with and without the short. I've seen it climb steadily in voltage starting from 0v and more than 100v. I also saw it climb extremely fast from 0v to battery voltage, then reset and climb again. Th...
by Chronosock
Sat Sep 29, 2012 7:21 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Battery Voltage: 3.113v
1: 0v
2: 1.643v
3: 2.032v
4: 3.084v
5: 2.061v
6: 0v
7: 0.791v
8: 3.113v

And I am using a Mastech MS8268 Digital Multimeter:
by Chronosock
Fri Sep 28, 2012 10:06 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

So, got the voltages, here are the results: Battery terminal to pin 3 of J6: 3.119v TP1 to pin 3: 3.118v TP2 to pin 3: goes between 106.5-109v For U1 I wasn't quite sure what pin was what number, so I measured them from left to right if you were looking at it from the top Pin 1: 2.68 Pin 2: 0 Pin 3:...
by Chronosock
Fri Aug 31, 2012 7:00 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Bit of an update, I now have a digital multimeter. What were the voltages you wanted me to check?
by Chronosock
Fri Aug 17, 2012 7:50 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Sorry for the wait again, I don't get to get to my little work area often. It is a GB Instruments GMT-312.
by Chronosock
Sat Aug 04, 2012 10:49 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Unfortunately I only have an analog one.
by Chronosock
Sat Aug 04, 2012 7:00 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Re-set U1 into its socket and made sure it was sitting in all the way, then redid C2 and a couple others on the HV side, and unfortunately, still nothing from that side and no whine from the speaker, I think I'm running out of options.
by Chronosock
Fri Aug 03, 2012 8:18 pm
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

Sorry this took so long, but here is the front and back pictures of my assembled Geiger counter.

Front: http://i.imgur.com/GG4yV.jpg
Back: http://i.imgur.com/POqYR.jpg
by Chronosock
Sun Jul 22, 2012 12:07 am
Forum: Geiger Counter
Topic: Geiger Counter Problem
Replies: 36
Views: 86149

Re: Geiger Counter Problem

For whatever reason it now passes the grounding test from TP1 to both PULSE pin 3 and the spring, probably from my poor wire positioning when trying to short them, but still fails to get a response from J1 connecting directly to J2 via the copper wire I had and the multimeter. Unfortunately I only h...