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Old 17th August 2013, 08:49 PM   #121
dsdjoy is offline dsdjoy  Germany
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Default Temperature controlled curve tracing


wanted to measure my transistors at operating temperature of my class-A amp. I found a way to do this and thought I share it here. May it be useful for others

Pictures speak for themselves....





You need:

- An aluminum strip, and transistor (isolated) attached to it.
- Digital thermometer attached to aluminum strip (probe close to transistor)
- electric iron (or similar)

What needs to be determined:

I noticed from other temp measurements in real amps- where the transistors are heating up the heat sinks: When heat sinks have 50 Degree Celsius, the transistors can have 70-80 Degrees Celsius.

If you are heating the heat sinks, to simulate such temperatures of transistors, you need to take that into account.


Last edited by dsdjoy; 17th August 2013 at 09:11 PM.
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Old 17th August 2013, 08:58 PM   #122
generg is offline generg  Germany
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Perfect Oliver....!
and the First Wtt is......a really First Class PSS Idea
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Old 18th August 2013, 12:57 AM   #123
locky_z is offline locky_z  China
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I suggest use PTC heating a small aluminum,
The PTC is constant temperature. it can be detached from the 'USB Tea Coffee Cup Warmer Heating Pad'.
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