Which is why, of course, reputable companies now insist on purchasing systems with full traceability and certification to specs.
But it would need international cooperation and rules. It's a real pity that fake device manufacturers have not been closed down as it has been a problem for decades. I guess if they are fakes they won't feel obliged to replace them. Thus, an assembly in which the transistor will work at the limit, the metallic type is also as indicated. 154 10Pcs 2N3055 MJ2955 TO-3 NPN Power Amplifier Power Transistor New. The electrical characteristics of the two transistors, TIP3055 and 2N3055 are the same, however, by its casing, the metal 2N3055 has a slightly greater ability to dissipate heat. also sells a good capacitor if you feel the need to replace it. 5pcs 2N3055 transistor 3055 new original transistor amplifier for welding. An SK 3009 should work, if you can find one. as WGski says a batch of low spec parts sold onto the "cheap" market) or fakes. The Delta Mark 10s use a Germanium PNP transistor with the electrical equivalents similar the 2N3055. They can decide whether to investigate if they are "genuine" manufacturing escapees (i.e. I would probably send the three duds to CDIL - I don't know if they are known to be customer supportive but ask for replacements and tell them where you obtained them is the usual route.
I take it that you have a diode or transistor you keep as a reference to check in these circumstances - I tend to have some components kept as reference such as a well calibrated resistor, capacitor or two and some trannys that are good examples. 2N3055 Bipolar (BJT) Transistor NPN 60 V 15 A 115 W Chassis Mount TO-3 from STMicroelectronics. Transistor 2N3055 NPN Power Bi Polar Expitaxial Base Min Qty: 1 Package Multiple: 1 Container: Each: 338 1 1.4900 10 1.2500. DMM diode tests usually put out about 2.5V and 1mA, so almost any transistor or diode (except a GaN LED perhaps) should pass that test. 2n3055 price and availability by authorized and independent electronic component distributors. I'm guessing when you say "no reading" the DMM sticks at 1? Meaning O/C base.
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