The ST13005 High Voltage NPN transistor used as a series regulator to get from 120V DC to 11 Volt DC скачать в хорошем качестве

The ST13005 High Voltage NPN transistor used as a series regulator to get from 120V DC to 11 Volt DC

Please read the description first, for the best and most complete information. When you measure the Current amplification (Hfe) of this HV transistor with a Hobby meter it is very low, say 2-5. But when this HV transistor is "in its element" (thus on higher voltages) it starts to perform. Showing its good properties. I show, in this video, how you can use the HV transistor ST 13005 (NPN Silicon) as a high voltage transistor, in a series regulator application, that makes (say) 11 or 12 Volt DC out of (say) 120 Volts DC. To let the heat (120 V to 11 Volt) NOT dissipate inside that ST 13005 Transistor, I used a series resistor that drives that ST 13005 on its collector. So now the heat is dissipated into a few lame resistors (togeter 3 K 4 is 3400 Ohm at say 5 Watt) , they will help to get the ST 138005 do its job for say minimal 30 years. Please note: I don’t tell more about the (precise) schematic of the sawtooth wave generator (200 HZ-9 KC).Because it was in an earlier video. The focus now (1 january 2026) is on this: Make a 12 Volt DC or 11 Volt DC power supply for that sawtooth generator, when supplied by 120 Volts DC. Reason: there will be a Voltage Amplifier connected to that sawtooth generator in the future, it will work on 120 Volt DC and will have an AC output (sawtooth wave) in the range of 60-70 Volt. The schematic of a properly working Sawtooth generator (0.5 Hertz – 18 KC) was showed earliuer, in 2025, with a good linearity. More info here (29 dec. 2025)    • Sawtooth Wave Generator 0.5 Hz to 18 KC. O...   Frequency depends on the capacitor value that you use: in this demo I used a 100 NF (=0.1 uf) capacitor to get a good sawtooth wave out. But the focus now & here is not about that: it is all about creating a stabilized voltage of (say) 11 Volt DC out, or 12 Volt DC out, out of that 120 Volt DC source. My You Tube channel trailer is here:    • Radiofun232 on YouTube, find working & tes...   Interested in certain electronic circuits? (Radio’s, audio amplifiers, audio pre-amps, audio filters, measuring devices to test transistors and (say) mosfets or (radio) coils or Shortwave and MW radio’s? Go to my Channel Trailer (“Radiofun232 on YouTube”). LInk is    • Radiofun232 on YouTube, find working & tes...   Type there the keywords that you like (e.g. radio/audio / amplifiers / filter / Shortwave / Short Wave /test / testing) into the “looking glass” = search function” and give “enter”. Via that you can find specific video’s (under the say 1700 published). In almost all video’s a schematic is showed, if so: it is a working and well tested electronic circuit. More usable keywords to search: ”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. Or https://www.lulu.com/search?adult_aud... I keep all my YT videos constant actual. Search on YT and avoid my circuits that are republished, re-arranged, re-edited on other websites, giving not probable re-wiring, etc. I take distance from all kinds of fake claims, made via republishing my circuits via the www. Thanks for watching & and a happy 2026. I appreciate your support always! Upload 1 january 2026.