Joethemechanic
Senior Member
- Location
- Hazleton Pa
- Occupation
- Electro-Mechanical Technician. Industrial machinery
What do you mean by code?
For CW communications. Talk to the other side of the world using just a couple watts
What do you mean by code?
I doubt I could do it then if they were looking for a specialized communications receiver like that. An all American 5, no problem.When I was in high school electronics class in nineteen hundred and seventy six. We had to draw a schematic for a superheterodyne radio receiving apparatuswith a pencil and paper from memory in order to pass the course.
View attachment 2565870
Unfortunately younger generations are not taught stuff like that anymore. It's really a shame.
BTW I doubt I could do it now
No!You mean like a “voltage pull-down circuit?” Such as how some automotive vehicles would use a computer module to send out an open circuit voltage from a resistor in series to a switch for a door window.
When the switch is pressed the circuit completes and voltage drops to near ground low potential but draws a current
Wave shows as a square DC wave signal to be used by computer to send power to window motor from another circuit
Could you still do it? I haven't built a receiver of many kind since school, and that was almost 50 years ago. The only real thing I've done with radio since then is get my general class license. I've built a lot of antennas even some 160 meter dipoles. I was going to build an amplifier, but once I got the hang of it, I realized that I can communicate with people on the other side of the earth with 100 watts or lessI doubt I could do it then if they were looking for a specialized communications receiver like that. An all American 5, no problem.
-Hal
What do you mean by code?
Ok I was thinking Morse code but now of days I know little about code programmingMorse code.
Sometime called 'the original digital mode', meaning a method of communicating information using discrete radio signal states.
Could you still do it?
I helped my friend's daughter build a crystal radio for her 5th grade science project. She had some kind of store bought kit and it was more or less worthless. The variable tuning capacitor was tough to find. Her uncle owned a auto salvage yard and I thought I'd find one there no problem. Yeah right, think again Joe. Finally some older guy that owned a garage came in to buy parts said "I think I might have one".. Yep he came back with one about 1/2 hour later and gave it to her. That had to be at least 15 years ago. She won 1st place at the science fair, she was so happy.two section variable tuning capacitor
No! What is meant is just like the lighting circuit you are working on.You mean like a “voltage pull-down circuit?” Such as how some automotive vehicles would use a computer module to send out an open circuit voltage from a resistor in series to a switch for a door window.
When the switch is pressed the circuit completes and voltage drops to near ground low potential but draws a current
Wave shows as a square DC wave signal to be used by computer to send power to window motor from another circuit
I helped my friend's daughter build a crystal radio for her 5th grade science project.
So true. We used to build our toys; now, we just buy them.When I wasn't married yet I thought I would save parts to build a crystal radio and other things for when I had kids. It would be nice to get them interested like I did at a young age. WRONG! All they do is hold their iPhones in their hand and couldn't care less about building anything or how anything works.
-Hal
I don't know how many hours I've spent inventing and building stuff I could have bought. Then had cash and time for beerSo true. We used to build our toys; now, we just buy them.
Funniest part was her dad sneaking into the schoolyard at like 4AM to hang a wire in a tree for an antenna , and driving a piece of copper tubing for a ground. He even had a gallon of salt water to improve the ground. He figured if he asked first, they would say no. Nobody said a word about it.When I wasn't married yet I thought I would save parts to build a crystal radio and other things for when I had kids. It would be nice to get them interested like I did at a young age. WRONG! All they do is hold their iPhones in their hand and couldn't care less about building anything or how anything works.
-Hal
Sad but true. Either robots will take over workforce or by the time the young generation are at the to work, companies won’t be able to fill work demand for skilled learned laborWhen I wasn't married yet I thought I would save parts to build a crystal radio and other things for when I had kids. It would be nice to get them interested like I did at a young age. WRONG! All they do is hold their iPhones in their hand and couldn't care less about building anything or how anything works.
-Hal