It is not a good idea to “peak” the IFs for maximum volume of a radio station. The radio should be aligned with a sweep generator connected to the oscilloscope. What you actually want is to tune the radio so the bandwidth looks flat topped with steep skirts. This gives your audio high quality. If
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I occasionally think of what possible things might have been sent over this microwave radio. When I was in Germany in the army we had microwave telecomm links on the tops of hills to connect our hawk missile sites to our headquarters. We had the voice channels connected to our switchboard and if you were
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What https://m.facebook.com/groups/276059605530869/permalink/654477951022364/?ref=share&mibextid=NOb6eG
This is hard to believe. It’s a lot of work to do on a cheap AM radio. But it gives me a lot of ideas. I wonder how many hours it took to do this, we see it happening in nust a few minutes. https://www.facebook.com/restorationpretty/videos/591611740013679/?mibextid=9drbnH&s=yWDuG2&fs=e
In the 1920s the TRF – tuned radio frequency – radios were hard to tune and their performance wasn’t very good. In 1929 the radio manufacturers started selling superheterodyne radios that had only one tuning knob, not several like the TRFs had. No more fiddling around with knobs to try to get good reception. Plus
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The US would be in a world of hurt. https://www.facebook.com/reel/1415952769223685?mibextid=9drbnH&s=yWDuG2&fs=e
A basic one transistor regen receiver uses an MPF102 JFET to give the regenerative gain. Also uses two transistors to amplify the audio to drive an earphone. https://www.circuitbasics.com/what-are-fm-receivers/
This is a long article but a very interesting project. It uses HSMS-2850 Schottky detector diodes in a discriminator. He uses WE 1200 ohm sound powered headphones. He’s Canadian. https://electronbunker.ca/eb/FMCrystalSet.html
I Came across this old analog TV modulator in a box of stuff, so I plugged it into my digital TV and powered it up, with some audio modulation on the input. I set the switch to channel 3, and then pushed 3 on my remote, but I got no carrier whatsoever on the TV.
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Caroline Joy Barnhart There is not enough tritium in the world to run a single fusion reactor for more than a few months. The energy used for production of tritium (and to a much less extent the supply of deuterium) must also be subtracted from the total output of the fusion reactor. That could reduce
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