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

i agree 100%

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.

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.

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).

@@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💭➡💡👌

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.

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

Ic