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building a simple oscilloscope part 1 Posted by: radioam232
Video duration: 90 seconds building a very simple oscilloscope (still without X and Y amplifiers) Related: cathode, homebrew, nl11561, oscilloscope, radioam232, ray, tube |
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how to test a bipolar transistor NPN or PNP Posted by: radioam232
Video duration: 173 seconds principles of testing a bipolar tran sistor by measuring the ratio between the base current and the C-E current Related: base, bipolar, collector, current, emitter, nl11561, npn, pnp, radioam232, test, testing, transistor |
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building a simple oscilloscope part 13 schematic Posted by: radioam232
Video duration: 444 seconds schematic and SAFETY WARNINGS (read this) for building the simple oscilloscope (and other scopes) Related: cathode, db7-2, dg7-2, dn7-2, homebrew, nl11561, oscilloscope, philips, radioam232, ray, safety, schematic, tube, warnings |
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Old tube radio BC 728 from the US Army Posted by: radioam232
Video duration: 130 seconds portable radio from World War II (as I see it well), 8 kg, shortwave 2-6 MHz, schematic in the book "Das Surplus Handbuch" from Bernd Jacobi, part 1, Verlag fuer tech.literature Werner Conrad, Germany Related: 2-6, 728, army, bc, ham, mhz, nl11561, old, radio, radioam232, receiver, shortwave, us |
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homebrew radio receiver with tubes Posted by: radioam232
Video duration: 71 seconds radio with two vacuum tubes for frequencies between 1 and 1,6 MHz (music live from receiver) Related: ham, nl11561, radio, radioamateur, shortwave, tube, vintage |
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how to test a bipolar transistor NPN or PNP part 2 Posted by: radioam232
Video duration: 147 seconds testing bipolar transistors by putting them as unknown transistor in a flip flop schematic Related: base, bipolar, collector, emitter, nl11561, npn, pnp, radioam232, test, testing, transistor, transistors |
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oId tube radio - transmitter RT 3030 or GRC 3030 Posted by: radioam232
Video duration: 95 seconds RT 3030 or GRC 3030 radio-transmitter 2-12 MHz, built by Van der Heem, The Hague, Netherlands, for the Dutch Army, in the '50's. Related: 3030, der, grc, hague, ham, heem, nl11561, radio, radioam232, rt, shortwave, the, transmitter, van |
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transistor as switch Posted by: radioam232
Video duration: 73 seconds bipolair transistors (Darlington) used as switch, (fingertip switch) Related: bipolar, darlington, nl11561, radioam232, switch, transistor |
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mini voltage transformer Posted by: radioam232
Video duration: 317 seconds Principles of a blokkeeroscillator (blocking oscillator?), how to construct, typical waveform, interference. Change X and Y if the oscillator does not work. Better results when you connect a capacitor of 100 N (0,1 uF) from Y to the point where 12 K and 25 K are connected. Related: blocking, blokkeeroscillator, interference, nl11561, oscillator, radioam232, transformer, voltage |
