crystal radio
Unpowered AM detector
A crystal radio is a simple radio receiver that uses a crystalline mineral as a detector to convert radio waves into audio signals.
It requires no batteries or external power, running entirely on energy from the radio waves themselves.
Crystal radios were popular in the early twentieth century and remain a common electronics project for beginners: My grandfather built a crystal radio as a boy.
Broadcast signal receiver
- coilWound circular arrangement
- detectorDevice that senses
- diodeOne-way semiconductor
- germaniumAtomic number thirty-two
tuning · capacitor · inductor · earphone · wire · solder · breadboard · schematic
Maximum oscillation displacement
- modulationVarying signals to transmit
- frequencyRate of recurrence
- shortwaveHigh-frequency radio band
- mediumwaveRadio frequency band
longwave · wavelength · carrier · broadcast · station · AM · reception · signal
Radio telegraphy pioneer
- 1920sPost-WWI American decade
- wirelessUntethered signal transmission
- cat's whiskerThin wire detector probe
- galenaSulfide ore of lead
bakelite · antique · vintage · pioneer · invention · spark-gap · telegraphy · Edison
Life's earliest phase
- memoriesStored past experiences
- grandfatherFather's or mother's father
- atticSpace beneath the roof
- bygoneOf earlier times
old-fashioned · retro · classic · heirloom · reminiscence · analog · simpler times · wonder
Casual, unskilled adjusting
- hobbyistRecreational pursuer of interests
- amateurNonprofessional participant
- makerOne who produces
- experimenterOne who tests hypotheses
kit · project · science fair · electronics · beginner · educational · hands-on · homemade
antenna
Broadcast signal receiver
germanium · tuning · capacitor · inductor · earphone · wire · solder · breadboard · schematic · grounding
amplitude
Maximum oscillation displacement
- modulationVarying signals to transmit
- frequencyRate of recurrence
- shortwaveHigh-frequency radio band
mediumwave · longwave · wavelength · carrier · broadcast · station · AM · reception · signal · tuning
Marconi
Radio telegraphy pioneer
- 1920sPost-WWI American decade
- wirelessUntethered signal transmission
- cat's whiskerThin wire detector probe
galena · bakelite · antique · vintage · pioneer · invention · spark-gap · telegraphy · Edison · golden age
childhood
Life's earliest phase
- memoriesStored past experiences
- grandfatherFather's or mother's father
- atticSpace beneath the roof
bygone · old-fashioned · retro · classic · heirloom · reminiscence · analog · simpler times · wonder · discovery
tinkering
Casual, unskilled adjusting
experimenter · kit · project · science fair · electronics · beginner · educational · hands-on · homemade · handmade
- radioAM, FM, news broadcast, AM/FM, fireside chat
- vintage audiophonograph, gramophone, turntable, record player, reel-to-reel
- early electronicstelegraph, telephone, dynamo, electric motor, electric generator
- vintage radiostransistor, stereo receiver, shortwave, tuning dial, dial face
- crystal radioscat's whisker, cat whisker, galena, earphone, earphones
- radio receiverstuner, detector, front end, SDR
crystal radiotube radio
Vacuum-powered broadcast receiver
transistor radio · stereo receiver · boom box · portable radio
crystal radioradio transmitter
Broadcasts electromagnetic signals wirelessly
radio, crystal, radiant, radiate, radios, radiation, radiator, crystallize, crystalline