☑ Measuring Germanium Transistor Leakage

That is incredibly too much leakage so any transistor that does that is not going to be useful for a ff. A 2472 ohm resistor is 2472 volts per milliamp so a milliamp of leakage will cause 2472 volts to display.

Ryan Andersen On Twitter Measuring The Leakage Of

1 Pcs Nos Tested And Measured Tungsram Oc1076 Pnp Germanium Transistor Ebay

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Germanium ones that have a much higher level of reverse leakage current may easily show a small deflection if the meter is set to a high ohms range.

Measuring germanium transistor leakage. A 2472 ohm resistor is 2472 volts per milliamp so a milliamp of leakage will cause 2472 volts to display. This simple analogue multimeter test of a diode is very useful because it gives a very quick indication of whether the diode is basically operational. Refers both to npn and pnp silicon or germanium though germanium can leak current in the reverse mode measurement.

Transistor leakage testing the right way. That is incredibly too much leakage so any transistor that does that is not going to be useful for a ff. For comparison a new nte part reads over 10k.

I dont doubt your statement that these components leak like sieves but what does that really mean sonically. Put a transistor in the socket. The resistor will convert any leakage current from the transistor into a voltage that you can then read on your meter.

When i measure between the emitter and collector of the transistors in question with an analog vom i read between about 50 and 500 ohms depending on the particular transistor. Read the voltage and calculate the leakage. Is this indeed the leakage i am measuring.

The ac128 is a great sounding germanium transistor but if you buy many of them there will be a large number left over that have too much base to emitter leakage to be useful in a voltage amplifier circuit. Typically a germanium transistor that measures around 350 might display 25 or so when tester the wrong way around. The resistor will convert any leakage current from the transistor into a voltage that you can then read on your meter.

Then throw the switch and apply 9 volts to the circuit and again measure the voltage. On the small bear fuzzface faq there is a drawing that illustrates how to measure transistor leakage near the end of the page. Foolproof way of testing germanium ekasilicon transistors for leakage.

Foolproof way of testing germanium ekasilicon transistors for leakage. Subtract the leakage from the second reading then multiply the result by 100 which gives the gain within a couple percent of the transistor. When you expect endless resistance it is 200 k or 500 k.

If not what is it and is it important. Almost all the germanium transistors im getting these days sound fabulous in fuzz circuits.