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Trying to figure NPN gain w GEO device

Started by jimbob, June 02, 2008, 06:35:19 PM

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jimbob

June 02, 2008, 06:35:19 PM
"The polarities of the battery and meters are shown for PNP devices; they are reversed for NPN."

The way I understood it was that for NPN gain to be checked all I would have to do was reverse the black and red battery wires and the red and black meter probes.

Am i missing something here?
Im getting no reading at all hmmm. 0.00


"I think somebody should come up with a way to breed a very large shrimp. That way, you could ride him, then after you camped at night, you could eat him. How about it, science?"

zombiwoof

#1
June 02, 2008, 07:33:47 PM
Are you sure you've the pinout correct for the NPN's you're using?  They can differ from one transistor to another.

Al

jimbob

#2
June 04, 2008, 02:20:25 AM
Anyone?

Looking to re configure the GEO device for NPN..
"I think somebody should come up with a way to breed a very large shrimp. That way, you could ride him, then after you camped at night, you could eat him. How about it, science?"

R.G.

#3
June 04, 2008, 07:43:18 AM
Most likely you have a wiring issue or a pinout issue.

Yes, all you have to do is reverse the battery, reverse the meter(even if you only do this mentally) AND make sure the new pinout is correct.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

jimbob

#4
June 04, 2008, 12:25:00 PM
Ill give it a try- thanks
"I think somebody should come up with a way to breed a very large shrimp. That way, you could ride him, then after you camped at night, you could eat him. How about it, science?"

jimbob

#5
June 04, 2008, 02:45:23 PM
I was testing some of those  CV7112 black glass military germanium where the the dot could be emitter or collector.
"I think somebody should come up with a way to breed a very large shrimp. That way, you could ride him, then after you camped at night, you could eat him. How about it, science?"
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