I got out the soldering iron and built a slightly tidier version of the #crystalradio circuit which works (despite being out of practice with soldering, and having to use the lead free stuff)

#radio #RadioCaroline

#RadioCaroline is now back on 4kW and broadcasting #RadioCarolineNorth from the #RossRevenge (they have an extra day of broadcasting due to the fundraiser) - the #crystalradio (now using a 220 uH inductor and 165 pF variable capacitor at around 78 pF for best tuning) receives the signal good and strong with quite decent volume to the PC line in (this video is taken using the mobile phone microphone, there is 0 amplification or soundprocessing)

#radio #OffshoreRadio #Suffolk

Half Crystal Radio, Half Regenerative Radio https://hackaday.com/2023/04/24/half-crystal-radio-half-regenerative-radio/ #classichacks #crystalradio #Regeneration #RadioHacks #radio

Half Crystal Radio, Half Regenerative Radio - A rite of passage in decades past for the electronics experimenter was the crystal... - https://hackaday.com/2023/04/24/half-crystal-radio-half-regenerative-radio/ #classichacks #crystalradio #regeneration #radiohacks #radio

Foxhole Radios date back to the 1890s but were most popular during WW2. Soldiers couldn't use vacuum tube radios bc their radio waves could be traced by the enemy, so soldiers built safe but crude crystal radios like this one at the Anzio beachhead in Italy in 1944, which used a blue steel razor blade with a pencil lead pressed against its surface by a safety pin as a detector.

Learn to make your own foxhole radio here:

https://survivalkit.com/blog/how-to-build-a-foxhole-radio/

#FoxholeRadio #Radio #CrystalRadio

Crystal Voices | The Old-School Hacker @ 1866 House

https://www.patreon.com/posts/crystal-voices-78454153/

#am #broadcast #crystalradio #diy #electronics #shortwave

Roll your own.

Tags? #3dPrinting #CrystalRadio #CrystalRadioCoilMandril

The design came from Wikipedia (please contribute there)

One 'tip' would be to take the main coil core off the mount, and print only that. The holes can be used to mount directly to a board, as well as the pasthrough for the wires. Spend some time smoothing or even polishing this piece. I don't know that it's needed, but it may help?

I want to build a new crystal radio either by kit or plans if anyone knows of a good design. #crystalradio #radio

Measured the inductor I made last night, which has an inductance of 0.24mH. Coupled with the variable capacitor which has a capacitance range of about 30-420pF, this will allow me to tune from 500kHz to about 1800kHz, easily converting the entire medium wave band.

#radio #hamradio #lockdown #boredom #diy #electronicsprojects #electronics #crystalradio