More From Ko Tilman

Schematics 1 (revised) By Ko Tilman
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A beginners book in electronics, ment for my You Tube viewers and everyone interested in electronics. Informative and useful to make a first start in electronics. Also useful for more experienced... More > people. With many schematics and illustrations (the content is extensively described in the preview on the Lulu website).This book is a revised version from a book under the same title, issued in 2008.< Less
two transistor sine wave oscillator 20 Hz - 19,2 KHz By Ko Tilman
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Schematic, layout and pictures from a two transistor (Wien bridge) sine wave oscillator (prototype) that works between 20 Hertz (15 Hertz) and 19,2 KHz. Easy to make, a real beginners project.... More > Including a schematic from the power supply and two schematics from 1 transistor amplifiers/buffers to which the generator can be connected. The circuit works on 12 Volt.< Less
2-10 MHz Shortwave receiver and 1 transistor VFO's By Ko Tilman
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Text: English. A schematic from a simple 5 transistor Shortwave receiver, usable for receiving broadcasting stations on frequencies between 2 and 10 MHz. Also 2 VFO schematics are given to make this... More > radio function properly. Though not designed for this purpose, tips are given to receive SSB and radio amateur stations with the help of a BFO (beat frequency oscillator). Please make the following textual adaptations to the text: A) page 25 the VFO signal is injected into the emitter B) page 35 remove the sentence "like the 2N2219" and C) page 43: NPN=PNP (BD 140).The schematics are all correct.< Less
2-10 MHz Shortwave receiver and 1 transistor VFO's By Ko Tilman
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Text: English. A book in which a schematic for a simple 5 transistor radio (excluded the audio amplifier) for Shortwave is published. Also a few VFO's are published to make this radio operational on... More > Shortwave. Please make the following corrections/adaptations to the text: a) page 17: the VFO signal is injected in the emitter from TS 2 b) page 25: the sentence "like the 2N2219" must be removed c) page 27: "medium power NPN transistor must be "medium power PNP transistor". On page 68 and 69: the BC 557 is a PNP (!) transistor, the arrow at the emitter is drawn in the wrong position (sorry, situation 10okt2015). All schematics are correct.< Less

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