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antennetuner for Shortwave receivers Posted by: radioam232
Video duration: 64 seconds Global video hits: 1929 coil and capacitor over it to attenuate an antenne of a certain length to a shortwave receiver Related: antenne, ham, nl11561, radioamateur, receiver, shortwave, tuner |
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receiving fax on shortwave Posted by: radioam232
Video duration: 58 seconds Global video hits: 1989 meteological information (fax/weathermap)rece ived on 9july2007 Related: 4.1, fax, ham, meteo, nl11561, radio, radioamateur, shortwave, weather |
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building a simple oscilloscope part 1 Posted by: radioam232
Video duration: 90 seconds Global video hits: 2199 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 Global video hits: 3690 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 12 Posted by: radioam232
Video duration: 88 seconds Global video hits: 1084 simple homebrew oscilloscope still without X and Y amplifiers Related: cathode, homebrew, nl11561, oscilloscope, radioam232, ray, tube |
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Old tube radio BC 728 from the US Army Posted by: radioam232
Video duration: 130 seconds Global video hits: 3899 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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mosfet as switch Posted by: radioam232
Video duration: 71 seconds Global video hits: 8765 n-channel power mosfet SSH6N80 from Samsung used as switch for carlamp 12 V-3 A. Other N-Channel power mosfets also will work Related: 12, 30, carlamp, fet, mosfet, nl11561, power, radioam232, ssh6n80, switch, transistor |
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mini voltage transformer Posted by: radioam232
Video duration: 317 seconds Global video hits: 750 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 |
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schedule 6088 tube as audio amplifier Posted by: radioam232
Video duration: 129 seconds Global video hits: 2432 electronic wiring of the 6088 tube as small audio amplifier Related: 6088, amplifier, audio, ham, nl11561, radioam232, schedule, wiring |
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how to test a bipolar transistor NPN or PNP part 2 Posted by: radioam232
Video duration: 147 seconds Global video hits: 2226 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 Global video hits: 3054 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 Global video hits: 6577 bipolair transistors (Darlington) used as switch, (fingertip switch) Related: bipolar, darlington, nl11561, radioam232, switch, transistor |
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principle of radio transmission Posted by: radioam232
Video duration: 95 seconds Global video hits: 2798 two L-C combinations, one transmitter and one receiver, resonant on the same frequency (RF absorption meter) Related: absorption, coil, coils, lc, meter, nl11561, radio, radioam232, receiver, resonance, transmission, transmitter |
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old radio tubes Posted by: radioam232
Video duration: 96 seconds Global video hits: 2378 old radio tubes from Philips from the oscilloscope GM3155 ('50's). Types: 807, A204 or 1876, 4673 and DN7-2 Related: 1876, 4673, 807, a204, cathode, dn7-2, gm3155, ham, nl11561, oscilloscope, radio, radioam232, ray, tube, tubes |
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how to make a voltage stabilizer part 2 Posted by: radioam232
Video duration: 204 seconds Global video hits: 780 circuit designing of this schematic and the importance/consequen ces of the current amplification of transistor 1 and 2. Note that the schematic is not shortcut protected so trans 1 can die when the max current is exceeded. Related: amplification, base, collector, current, diode, emitter, nl11561, radioam232, stabilizer, voltage, zener |
