Intelligent Curve Tracer 3.0 release - Page 10

Orion33 · 1st February 2013, 01:52 PM

Quote:

Originally Posted by locky_z

You can goto
CurveTracer : Locky_z's Curve Tracer
and download V3.5(2012.8.12)

Can you attach it here?

buzzforb · 1st February 2013, 09:20 PM

Locky,
I have the the tracer workinf again, but now I am getting very ragged response and cannot even measure in the same way before. Seems unstable. I replaced both the PMos and the Q7 with alternate transistors. I assumed this was not an issue due to the fact that they are not active in the actual measuring process/ Could this be causing my problems? Also, Although I have never cased it up, shold this help performance, providing a sheild from RF or other interferences?

locky_z · 2nd February 2013, 01:28 AM

Q7 and PMOS measurement does not play a role, you can even shorted PMOS D-S. But the protect will disable.

You also can short the Q1 B-E/ Q2 B-E / Q3 B-E /Q4 B-E ,then The LM358 driving the test unit direct. Q1~Q4 not play any role. But you only can measure small signal device.
In this way to see whether the system is stableand.

Orion33 · 2nd February 2013, 08:27 AM

buzzforb,
Have you tried to connect the oscilloscope to the measured transistor? Possibly occurs RF generation. If so, try to connect 1-10 nF capacitor between B and C or G and S.

buzzforb · 2nd February 2013, 08:48 AM

It's a new problem. Never had issue in the past

1st February 2013, 09:20 PM	#92
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	Locky, I have the the tracer workinf again, but now I am getting very ragged response and cannot even measure in the same way before. Seems unstable. I replaced both the PMos and the Q7 with alternate transistors. I assumed this was not an issue due to the fact that they are not active in the actual measuring process/ Could this be causing my problems? Also, Although I have never cased it up, shold this help performance, providing a sheild from RF or other interferences? __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

2nd February 2013, 01:28 AM	#93
locky_z diyAudio Member Join Date: Jun 2004 Location: XH	Q7 and PMOS measurement does not play a role, you can even shorted PMOS D-S. But the protect will disable. You also can short the Q1 B-E/ Q2 B-E / Q3 B-E /Q4 B-E ,then The LM358 driving the test unit direct. Q1~Q4 not play any role. But you only can measure small signal device. In this way to see whether the system is stableand. __________________ Intelligent Curve Tracer on ebay

2nd February 2013, 08:48 AM	#95
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	It's a new problem. Never had issue in the past __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

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2nd February 2013, 08:27 AM	#94
Orion33 diyAudio Member Join Date: Jun 2011	buzzforb, Have you tried to connect the oscilloscope to the measured transistor? Possibly occurs RF generation. If so, try to connect 1-10 nF capacitor between B and C or G and S.

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