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
Archive for the ‘modification’ Category:
2024-03-09 Big Clive’s Old Tungsten Roadwork Beacon – Barricade Flasher
I built this “tungsten roadwork beacon” as Clive calls it, using the parts given in my schematic (photo below). I didn’t have a 6V, 90 mA lamp, so I simulated it by using three 20 ohm, 1/4 Watt resistors in series, which gives 60 ohms and 100 mA load with 6VDC. For an indicator I
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2024-02-12 Catalytic Converter For Smokeless Fire Wood Stove
This is really interesting. A catalytic converter for a wood stove. 1 min. YouTube video.
2023-11-27 RCA BFO Audio Oscillator Photos
Chuck commented about the audio oscillator being a BFO, and it reminded me that I’ve got an old RCA BFO audio oscillator stuck away in the garage. It was a cheap way of getting an audio sine wave that covered the full audio band without any switching. Nowadays it’s all done in sine and other
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2023-09-08 Michio Kaku: Trillion Watt Lasers To Make Clouds Rain
“Alleged to have done it…” https://www.facebook.com/reel/1022515662278891?mibextid=9drbnH
2023-05-03 Range Energy Electric Powered Trailers
Range Energy thinks it has the best answer, and it doesn’t require any retrofitting of tractors or engines, just a new trailer. Range figured that so many people have thought about electrifying the semi-truck tractor, but nobody has really focused on the trailer. This makes sense considering the trailer is just dead weight on most
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2022-02-27 Caps Wiki – Repairing Electronics
Caps Wiki – a place for you to share your repair notes. I like the idea. I’m wondering if I have the patience to spend the extra time. https://hackaday.com/2022/02/24/caps-wiki-place-for-you-to-share-your-repair-notes/
2020-11-02 Signal Tracer Or Audio Amp From An Old AM Radio
Its not hard to make a signal tracer from an old AM radio. You need 60 mm of red and black flexible twisted pair, a 0.22 uF, 100V capacitor, a small black alligator clip, a 50 mm length of shrink tubing that will fit over the following probe, and a thin 100 mm long piece
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2020-09-28 Big Marine Engine Is Dual Fuel, Diesel Or Hydrogen
It’s amazing how there are plans for the near future for dual fuel engines that can use diesel or hydrogen. These engines can be used for railroads or marine, or for generating electricity. The 1 MW engine is equivalent to about 1350 HP. Here is a quote from this article: >> At a press event,
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2020-09-21 Hydrogen Fuel Cells V. Battery Electric Vehicles
My take in a comment >> @mfhberg Said, “[Hydrogen Fuel Cell vehicles] will die…” Right now, it looks like Toyota’s Mirai, Hyundai and Honda all have a sizeable stake in the HFC market future. These are not backyard grease monkeys, these are car companies that have done a lot research and development. Toyota has had
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