Kanaal van radiofun232
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noise generator schematic 2
radiofun232
119 views
Correction to the video: when I say "the two diodes" I mean "the two transistors". The collector resistor from the second BC 547 is 1 K. The power supply transformer has a ...
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germanium transistors, audio pre amplifier, part 2
radiofun232
130 views
Do Germanium transistors and Silicon transistor each have their own "sound color"? In this video I test the difference between a AC 187 (NPN Germanium) and a BC 547 (NPN Si...
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germanium transistors audio pre amplifiers, part 1
radiofun232
176 views
Part 1 from a series about how to make an audio pre-amplifier with a Germanium transistor. It also describes the typical properties from a Germanium transistor (low barrier...
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white led properties
radiofun232
122 views
The properties from white LED's.They need a somewhat higher voltage to work properly. Test it individually. It depends.
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Inside the Ferraris meter and energy saving with a dimmer
radiofun232
107 views
How a Ferraris meter works and how to save energy with a dimmer.
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do audio capacitors have a certain "sound" ? (part 2)
radiofun232
110 views
Different types of capacitors tested on their properties as coupling capacitor in an audio circuit. frequency 1,3 KHz and a lot of harmonics. Tested: oil, paper-tar, silver...
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do audio capacitors have a certain "sound" ? (part 3)
radiofun232
52 views
Different types of capacitors (all 10 N or 0,01 uF) are tested on their property as coupling capacitor in an oudio circuit. Tested: oil, paper-tar,silvered mica, foil high ...
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do audio capacitors have a certain "sound" ?
radiofun232
238 views
In this video I tested different capacitors (foil, ceramic, multilayer, "plastic") from the same value (10 N = 10000 pF) on their property to act as "high cut" capacitor i...
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Pierce crystal oscillator and oscillator circuits
radiofun232
225 views
How a Pierce crystal oscillator works and more information about the fundamentals of oscillator circuits. More oscillators in my book "Retro Radio" (Dutch text), author Ko ...
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how to use a frequency counter, part 2
radiofun232
115 views
See the WARNING later in this textbox. The next video about how to use a frequency counter. Issues: 1) prevent the signal cable to "float" (generally spoken this means conn...
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