![Bund Freier Radios on Twitter: "[Info] Radio Słubfurt startet auf der 91,7 MHz https://t.co/rCWeYHE4eN https://t.co/AfI4Py9dho" / Twitter Bund Freier Radios on Twitter: "[Info] Radio Słubfurt startet auf der 91,7 MHz https://t.co/rCWeYHE4eN https://t.co/AfI4Py9dho" / Twitter](https://pbs.twimg.com/media/FGkV4JjUUAY3-aa.jpg)
Bund Freier Radios on Twitter: "[Info] Radio Słubfurt startet auf der 91,7 MHz https://t.co/rCWeYHE4eN https://t.co/AfI4Py9dho" / Twitter
![I've made another Crystal radio,it operates in the 4-7 mhz range.The long blue coil is the antenna,and the tin can thing is a tunable capacitor.the reception is pretty bad,but there aren't many I've made another Crystal radio,it operates in the 4-7 mhz range.The long blue coil is the antenna,and the tin can thing is a tunable capacitor.the reception is pretty bad,but there aren't many](https://i.redd.it/ive-made-another-crystal-radio-it-operates-in-the-4-7-mhz-v0-uic18sxaqeo91.jpg?width=4000&format=pjpg&auto=webp&s=03825210012404929d01af8479433bb420355f94)
I've made another Crystal radio,it operates in the 4-7 mhz range.The long blue coil is the antenna,and the tin can thing is a tunable capacitor.the reception is pretty bad,but there aren't many
![Color online) (a) Interferogram at 843 : 7 nm (RF 91 MHz), (b) – (e)... | Download Scientific Diagram Color online) (a) Interferogram at 843 : 7 nm (RF 91 MHz), (b) – (e)... | Download Scientific Diagram](https://www.researchgate.net/profile/Tulsi-Anna/publication/51919226/figure/fig5/AS:305999312375812@1449967330061/Color-online-a-Interferogram-at-843-7-nm-RF-91-MHz-b-e-cross-sectional_Q320.jpg)