Recent content by dredre04

Hi, sorry for late, i never had a advice for PM. Anyway i already seen that video. Can you confirm that it works? Today functional NOS germanium transistor it hard to find for the characteristic of germanium that is pulverized.

I don't think it is necessary to have SBTs. The technology has gone on over the years and has created effective semiconductors in the role. The route starts from physics from Germanium and passes through Gallium.

EDIT: The resistance for the AWG60 is not 1.3610219474721896 ohms per meter but 346.7071209Ohms per meter.

Hi, the AWG 36 wire has a diameter of 0.005000 inches or 0.1270 millimeters. I will use the calculation in millimeters because it is the unit of measurement that I use geographically. Copper has a resistivity of 1,678 x10 ^ -8 ohms per meter so to obtain a total impedance of around 1000ohm you...

Hello, sorry I wrote badly,for German I meant Germanium. I'm not talking about the resistance that goes between pin 3 of the 555 and the transistor gate because this resistance is necessary and correct. I'm talking about the impedance of the PI coil. In that case, Preston speaks of AWG 60 and...

I watched the video when the the coil is described and he talks about using a very thin wire is an AWG60 wire !. Do you have any idea how thin that copper wire is? It is not possible to handle it by hand. the thickness of the thread speaks of it at 3:40. With that wire diameter, to obtain about...

Hi guys , abiut pi coil on this video at this time (3.38.55) Preston say that the four coil are not separated in the same way . Only first three are separated in the same way but there are more space between the tird and the fourth coil. Preston also explains why and may be important. Have you...