NOV4

Voice powered crystal controlled radio transmitter

In case you have missed this before (I sure have) here is a radio transmitter that doesn't require any power source. Well, at least not any classic power source like batteries.

This radio transmitter is powered by the operator's voice alone! The speaker connected to the device converts audio signal to low voltage at the end contacts. Naturally, amplitude of the generated voltage corresponds to the amplitude of the speaker's voice, hence making this an amplitude modulated power source. This power source is used to power the high-level DSB modulator/crystal-controlled RF oscillator. The interesting part is that the range of this transmitter is around 160km/100miles!

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© El Silbo

[ Source: El Silbo ]


Radio predajnik sa kristalom bez napajanja Bookmark and Share Comments (9)

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comment [9]

  • From Aleksa on 02-11-2018 at 04:40:08

Ne znam za predajnik kolikimu je domet jer ga nisam pravio. Prijemnik sa kristalom sam pravio u osnovnoj skoli na casu optetehnickog obrazovanja jos davne 1962.godine. Slusao sam na desetine radio stanica. Narvno sve to bez ikakvog napajanja.
IP: 159.69.60.227

comment [8]

  • From ccc on 10-08-2010 at 07:21:27

ma vjerovatno greska, mozda 16m, nemoze nikako biti vise...
IP: 92.36.150.137

comment [7]

  • From on 27-11-2009 at 17:54:56

opa...lijepo! :) kada bi bar bilo istinito!
IP: n/a

comment [6]

  • From dx-er on 26-11-2009 at 17:53:09

mislim da glas ne mogu dati tolko struje za 5mW. A sa 5mW ne mogu pokriti ni 100m a kamo li 160km
IP: n/a

comment [5]

  • From tesla2 on 22-11-2009 at 11:20:44

160km ??? Svaka cast....................
IP: n/a

comment [4]

  • From mok on 19-11-2009 at 19:07:32

160km svaka cast..
IP: 92.240.33.241

comment [3]

  • From zarec on 09-11-2009 at 18:33:05

OVO JE STVARNO OK
IP: n/a

comment [2]

  • From trax on 09-11-2009 at 08:07:52

jesi, 160km! :)
IP: n/a

comment [1]

  • From reely on 08-11-2009 at 21:23:13

Jesam ja dobro pročitap...160km??
IP: n/a


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