How to do experiments with analog transistor circuits: part 3



Published
PART 3 of the series. A series of 5 video’s (the 4th video stops suddenly, sorry for that, my camera got too warm, switched itself out) about how to do experiments with analog transistor circuits.

I will give the links to the complete series of 5 video’s here:

Video 1 of the series https://youtu.be/mvV20L5hgdk
Video 2 of the series https://youtu.be/6wy5kZzoRi8
Video 3 of the series https://youtu.be/bgBFBMGlGRc
Video 4 of the series https://youtu.be/lE_HYredoOc
Video 5 of the series https://youtu.be/oKLqszUpp88

No theory, but only practical idea’s and tips, based of course on the electronics theory. Perhaps made and more suitable for beginners, but everyone can take profit of experiments with analog (or digital) transistor circuits. These are “free” video’s, made at first hand, only based on my experiences with these transistor circuits during more than 50 years. For the more elaborated and scientific approach: study electronics, via the www or a (high) school or via academic education.
Correct me if I am wrong when I tell something and/or elaborate, no problem.


Could be that bipolar transistors in this series of 5 video's (because they are somewhat theoretical & sketched) are not biased, or no biasing is showed to get them to their "working point" where they do what they have to do in their collector lead. In general: a 470 K potmeter with its wiper to the Base and its low elecrode of that potentiometer to the ground and its high electrode via a 2 K resistor to the (+) gives a proper bias. You can send in (in that situation) the signal via a (decoupling) capacitor to the BASE.


There are more than 1200 Video’s on my YT channel. I only do analog electronics: audio amplifiers, analog measuring devices, radio circuits, many Shortwave radios, many oscillators HF and audio, other audio & shortwave circuits. Also many (test) generators for all kinds of waveforms, both in the audio range and HF.

Also simple “switch” circuits like the Schmitt triggers acting on different input voltages, 555 circuits and circuits of basic electronics issues like “Ohms law”, resistance properties, capacitance properties, the capacitors testing process, electronic “matching” in audio circuits and audio amplifiers, audio pre amplifiers, microphone amplifiers, etc. In all cases you find the schematic inserted in the video.


When you have questions about (certain analog) electronic circuits and how to make them: go to my Channel trailer (Radiofun232 on You Tube) and go to the “looking glass”. Type there the keywords that you want/need like: “power supply”, audio amplifier, capacitor tester, oscillator, radio, shortwave, shortwave radio, or any keyword you like to find the essential info & schematics on my YT channel.
My You Tube channel trailer is here: https://youtu.be/xbgQ8T3oqh4 When you search, search always “NEWEST FIRST” to get the right overview. You can also search via the “looking glass” on my Channel trailer via keywords like ”audio”, “radio”, “amplifier”, “filter”, “Shortwave”, “transistor”, “FET”, “oscillator”, “generator”, “switch”, “schmitt trigger” etc; so the electronic subject you are interested in. My books about electronics & analog radio technology are available via the website of "LULU”, search for author “Ko Tilman” there.



https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=Ko+Tilman


I keep all my YT videos constant actual, so the original video’s with the most recent information are 3 always on YouTube. Search there, and avoid my circuits that are republished, re-arranged, re-edited on other websites, giving not probable re-wiring, etc. Some persons try to find gold via my circuits. I take distance from all these fake claims. I cannot help that this happens. Upload 12 september 2021.
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