8 x genuine Matsushita
2SA101 germanium PNP transistors, TO-1
You are buying 8 pcs
of genuine Matsushita 2SA101 germanium PNP transistors in TO-1 package,
never used with clear marking on the cases.
We tested these transistors
to a specific gain range and leakage. The gain was measured by our own method (as described below for details) with collector current of 1mA. All measured data (at
Tamb=24°C / 75°F) are shown below.
8
x 2SA101 transistors |
Hfe
at Uce=3V, Ic=1mA |
Icbo
( µA ) at Ucb=3V |
№1 |
22 |
2.2 |
№2 |
24 |
1.1 |
№3 |
26 |
3.0 |
№4 |
29 |
2.1 |
№5 |
32 |
1.5 |
№6 |
34 |
2.0 |
№7 |
37 |
1.2 |
№8 |
43 |
2.2 |
Measuring a
germanium transistor with a simple digital multimeter (at the terminal usually
labeled E-B-C-E) always shows a higher gain than actual. A multimeter current of 10 microamps delivered to the
base of the transistor under test is comparable to the collector-to-base
leakage (Icbo) of (any) germanium transistor. The transistor amplifies both currents, in
which case the multimeter shows a larger gain (for poor
quality transistors over 300%).
Our method to check quality of germanium
transistors is via two measurements of the base current. By this the gain is
calculated and also conclusions can be made for what the measured transistor
can be best used.
Note that additional testing of the transistors will likely
lead to variants in results due to ambient temperature of the room and handling
of the component. When the temperature rises by 10°C (or 10°K), the leakage
increases by 2 times and also the gain increases by several %.
If you buy more than one item, please do not pay until we issue you an invoice for combined shipping. The shipping will have a tracking number.