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500-meter FM FM transmitter make this paper a low power FM transmitter, the use of a special launch control, modulation depth, does not produce amplitude modulation, distortion, sent from far, stable. Circuit is simple system can work as long as the correct welding, circuit shown in Figure 1. Figure 1 circuit
500-meter FM FM transmitter production
This article describes a low power FM transmitter, the use of a special launch control, modulation depth, does not produce amplitude modulation, distortion, sent from far, stable. Circuit is simple system can work as long as the correct welding, circuit shown in Figure 1.
Figure 1 circuit, by a special launch tube T2 and its peripheral parts composed of a frequency range of 88 ~ 108MHz high frequency oscillator, electret microphones pick up audio signals were first amplified by T1, the low frequency signal amplified again modulated high-frequency carrier. If the microphone off in a very M, the input is the output inspection scope can transmit music signal very well.
Be noted that RF-specific management T2, the model is FF501, using the standard T0-92 package (the same as 9000 transistors), shape and pin arrangement shown in Figure 2, the ICM is 45mA, fT greater than 1 .3 GHz, VCEO to 13V. Exclusive possession of the advantage is consistency, and RF output power is larger, the circuit is easy to adjust, FF501 fully able to work at higher frequencies, the reader may try to launch tube for launching other experimental high-frequency circuits. Circuit L2 enameled with ∮ 1.0mm drill bit on the ∮ 5.1mm 5 turns around the stretched womb to 0.8cm, C3 ~ C8 high-frequency ceramic capacitors are available, the antenna rod is best to use 1.2 m and vertically mounted. Then we must stand a good antenna power. Circuit operating current of about 25 ± 5mA. Such as the launch is not 88 ~ 108MHz frequency range, can be properly adjusted the length of resonant coil L2.
Alignment circuit is completed, FM radio with FM section for receiving, and effective transmission radius of 500m.
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es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org ->Afrikaans
sq.fmuser.org ->Albanian
ar.fmuser.org ->Arabic
hy.fmuser.org ->Armenian
az.fmuser.org ->Azerbaijani
eu.fmuser.org ->Basque
be.fmuser.org ->Belarusian
bg.fmuser.org ->Bulgarian
ca.fmuser.org ->Catalan
zh-CN.fmuser.org ->Chinese (Simplified)
zh-TW.fmuser.org ->Chinese (Traditional)
hr.fmuser.org ->Croatian
cs.fmuser.org ->Czech
da.fmuser.org ->Danish
nl.fmuser.org ->Dutch
et.fmuser.org ->Estonian
tl.fmuser.org ->Filipino
fi.fmuser.org ->Finnish
fr.fmuser.org ->French
gl.fmuser.org ->Galician
ka.fmuser.org ->Georgian
de.fmuser.org ->German
el.fmuser.org ->Greek
ht.fmuser.org ->Haitian Creole
iw.fmuser.org ->Hebrew
hi.fmuser.org ->Hindi
hu.fmuser.org ->Hungarian
is.fmuser.org ->Icelandic
id.fmuser.org ->Indonesian
ga.fmuser.org ->Irish
it.fmuser.org ->Italian
ja.fmuser.org ->Japanese
ko.fmuser.org ->Korean
lv.fmuser.org ->Latvian
lt.fmuser.org ->Lithuanian
mk.fmuser.org ->Macedonian
ms.fmuser.org ->Malay
mt.fmuser.org ->Maltese
no.fmuser.org ->Norwegian
fa.fmuser.org ->Persian
pl.fmuser.org ->Polish
pt.fmuser.org ->Portuguese
ro.fmuser.org ->Romanian
ru.fmuser.org ->Russian
sr.fmuser.org ->Serbian
sk.fmuser.org ->Slovak
sl.fmuser.org ->Slovenian
es.fmuser.org ->Spanish
sw.fmuser.org ->Swahili
sv.fmuser.org ->Swedish
th.fmuser.org ->Thai
tr.fmuser.org ->Turkish
uk.fmuser.org ->Ukrainian
ur.fmuser.org ->Urdu
vi.fmuser.org ->Vietnamese
cy.fmuser.org ->Welsh
yi.fmuser.org ->Yiddish
FMUSER Wirless Transmit Video And Audio More Easier !
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