Hartley Oscillator - Sine Wave Generator - Mated With a Common Base Amplifier - Simply Put

[@bryanmenjivar8742]

My man, thank you for your channel. You are feeding a hunger for knowledge that I am trying to satisfy. Thank you for teaching in a way institutions have failed

[@jamieostrowski4447]

Probably the best description I've seen of a hartley oscillator. Thanks!

[@liftgaming1588]

Simply Put is GOATED as far as I'm concerned

[@reelue2676]

dude i'm so glad this guy takes the time to make these videos they're so helpful

[@michaeld9682]

You are extremely helpful and I feel that you fill in a serious "gap" for beginners

[@keithking1985]

i agree 100%

[@LousyPainter]

Not to apply any stress on you for production but I always look forward to the next one. You give great examples. Cheers

[@eddy42109]

Many thanks! I had the same frustration, so many working circuits, which simply did not work for me! Yours did, and I was able to find a good starting point.

[@yuvrajkanna.k50]

Thank you sir for nice explanation 👍👍👍

[@jimmydburrell]

Well done. Thank you. You have given me a circuit I can experiment with and further enhance my understanding of your description. One suggestion: it might help your viewers if, just before the cutover to the workbench you labeled the value of the components on your whiteboard drawing. That way, your viewers would have a visual reference for the circuit, a.k.a. A schematic. Thanks again.

[@simplyput2796]

I was totally going to do that but I just forgot. I wish I had a production team to keep track of these things for me.

[@VeryMuchBlessed]

Good video. Seeing it on the Scope was very helpful. Thanks.

[@mandelbro777]

> works for other youtubers but not for me story of my life, but I guess that's half the fun of hair greying. Interesting solution as always.

[@parapos]

great explanation, thank you.

[@omundofisica9785]

Very good!

[@waterfuel]

Question about 1993 diagnostics book with a Hartley circuit. 1khz Hartley with parallel cap to ct coil to ground , has PNP sinewave oscillator with base bias of resistance REDUCED when RF is introduced on the base. The Tone in speaker goes way up in pitch fast. How does the tone change upward, with set cap/L coil pre set, or is it just modulation / heterodyning about the included RF that can be now be heard as a RESONANCE modulation over the 1khz carrier? These units are selling over $300 for special contamination test meters, with presence of RF from all samples. (This is called handheld resistance change biofeedback Syncrometer.)

[@theengineer9910]

Great video. When it comes to oscillators without 555 timers everything just stands still. Maybe my part values are too big.

[@Savage-lx5yj]

I saw another video where you were explaining "ground". Where does the current go when a wire is shorted to the chasis? How does it dissipate if a vehicle like a push mower has no battery or negative terminal! Thanks

[@simplyput2796]

The chassis is basically just a gigantic weirdly-shaped wire, so if you connect a wire to it, it's just more wire. You can run things like car tail-lights with just a single wire to each because the "return" (in other words, the second wire) is just the chassis. If there's no battery, there's no current, so what is dissipating? If you mean you have some circuit that's powered, and you connect that circuit's ground to the chassis (a "chassis ground"), then the chassis just becomes a giant wire that anything can connect to and be circuit grounded, and it's mostly for safety so if something goes wrong and shorts, there's no single "hot spot" that someone might touch and get hurt.

[@romiam2423]

Thanks, keep on going.

[@Savage-lx5yj]

For instance, the magneto or magnetron creates spark on a push mower that has no battery. It also has a "ground" wire that can short to the frame or chasis. Where does that current go after the frame? The vehicle is on rubber tires, no earth ground....Thanks again

[@simplyput2796]

You're making the mistake of thinking of "ground" as a sort of end point where things go. Electricity is in circuits, and "ground" is just a particular electric potential where we say the voltage is 0 and all other voltages are positive or negative relative to. A magneto is just a fancy electromagnet that turns mechanical energy into electrical energy by forcing it to flow through the spark plug, so the magneto takes the place of the battery in an engine with no battery. The chassis is essentially a big wire.

[@Savage-lx5yj]

@@simplyput2796 Thanks, sorry for the confusion. I think I've got it! Great explanations!🤗

[@simonlayden55]

any chance of some values to the components so we can experiment? I could just wing it but the wife says that usually doesn't turn out so well. Newby to electronics but with a sense of humour

[@king0vdarkness]

May I ask the use?

[@keithking1985]

have you tried it with the short U type jumper wires??? if you have none make some out of copper wire & heat shrink!! thats what i done. P.S that circuit was Pure class.. Like a Complicated joule thief!! oh yeah.. as far as i can remember the Hartley oscillator used the center tap of a variable inductor & the other used a variable cap!! in that book Art of Electronics 2nd edition.. had it about a year or more ago from the library im sure(but not 100% on it) thats how the schematic of them looked like. could you tell me if thats correct??. now its time for me to watch the video again..

[@simplyput2796]

I do have those jumpers, it's just so much slower so I use these wires when I can. All I wanted to do was to demonstrate the circuit and it worked fine enough for that purpose, plus I find it interesting to be able to demonstrate the effects of a breadboard and how just one small part of the circuit had such a large effect on it. Also yes, the "original" way to do a Hartley is to have a centre-tapped single inductor and to put it across the collector and base of a common-emitter BJT, but you 100% do not need a centre-tapped inductor and two separate ones do just fine. The mutual inductance is not what makes things work (but if you do have mutual inductance, you have to include it in the math to calculate the resonant frequency).

[@keithking1985]

@@simplyput2796 thank you I loved this video. And loved how you drew the red wire connection on the white board!! Most people just use a break or a little jump to show that those two tracks are not connected.. But you used both😊 I never saw that before & just might have to borrow it.🍻for the💭➡💡👌

[@POLMAZURKA]

WHERE DO YOU GET THE STICK ON PARTS FOR THE WHITE BOARD?

[@Kaan_is_myname97]

how can i get a 2.1Ghz sinusoidal wave oscilation ?

[@ohmslaw6856]

Ic