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is.fmuser.org -> Kiaislandi
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ga.fmuser.org -> Kiayalandi
it.fmuser.org -> Italia
ja.fmuser.org -> Kijapani
ko.fmuser.org -> Kikorea
lv.fmuser.org -> Kilatvia
lt.fmuser.org -> Kilithuania
mk.fmuser.org -> Kimasedonia
ms.fmuser.org -> Kimalesia
mt.fmuser.org -> Kimalta
no.fmuser.org -> Kinorwe
fa.fmuser.org -> Kiajemi
pl.fmuser.org -> Kipolishi
pt.fmuser.org -> Kireno
ro.fmuser.org -> Kiromania
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sv.fmuser.org -> Kiswidi
th.fmuser.org -> Thai
tr.fmuser.org -> Kituruki
uk.fmuser.org -> Kiukreni
ur.fmuser.org -> Kiurdu
vi.fmuser.org -> Kivietinamu
cy.fmuser.org -> Kiwelsh
yi.fmuser.org -> Yiddish
1) Description
Mfuko huu ina schematic na PCB-layout kwa oscillator FM kutumia BF900 Dual lango Mosfet, na inaweza kutumika kati ya 90 na 110 MHz. Maalum kuhusu mambo oscillator hii ni kwamba ina chini sana kelele, na ni imara sana. Kama matumizi ya buffering sahihi, PLL haipaswi kuwa muhimu zaidi yoyote (ingawa ni ofcourse inawezekana kutumia moja).
frequency ni wa kwanza kuweka na trimmer C4. Marekebisho inaweza kufanywa na R8 (VFO mbalimbali ni kuhusu 4 MHz).
Kupima baadhi alinipa matokeo ijayo:
(Frequency = 100 MHz; Pato = 50 ohm dummy (20 * 1K / 1W par; homebrew)
Pembejeo = Sweeposcillator 0.5-55 kHz (Stereo Coder)
Power Supply: 15 V DC ('hakuna Ripple')
Pembejeo sasa: 50 mA
RF Pato: 55 mVpp
Freq. Kupotoka: 0.005 MHz (baada ya masaa 10; kupotoka yaliyotukia wakati wa saa ya kwanza, baada ya kuwa kupotoka hakuna)
2) Vipengele / Hints
Matumizi bora ya PCB, upande mwingine ni shaba, kufanya uhusiano kati ya baadhi ya pande mbili. Kujenga oscillator katika casing RF-ushahidi, kutumia viungio nzuri na cable, na kuwa na ufahamu wa wengine wote RF sheria-ya jengo.
Mlima BF900 shimo (kipenyo kuhusu 6 mm) lazima kuwa casing ambapo unaweza hutegemea in mimi mwenyewe alikuwa na matatizo na 'nyingine upande shaba' kitu, kwa sababu oscillator yangu bila kurejea kwenye (si pia kutosha kelele? just kidding). Ilikuwa kutatuliwa wakati mimi kuondolewa chini ya shaba BF900 (kuhusu 1 - 1.5 cm).
Kama mtu ana maelezo kwa ajili yake, basi mimi kujua ...
Wala kutumia aina nyingine ya resistors!
Unaweza kutumia zener-utulivu badala ya mdhibiti 7800-. Tatizo tu ni kwamba inaweza kusababisha DC-alika juu oscillator, na kwamba itakuwa niliona kama humm. mdhibiti voltage si hivyo ghali, hivyo si kukata gharama juu yake.
Badala ya BF900, BF905 au BF907 inaweza kutumika bila matatizo yoyote. Labda BF981 atafanya pia, lakini kwamba mimi si kipimo.
3) Matatizo?
Kama una matatizo fulani, una kujaribu kuyatatua mwenyewe kwanza. Lakini kama hakuna ufumbuzi yanaweza kupatikana unaweza kuwasiliana na mimi, ili tuweze kujaribu kufanya kazi nje. Mzunguko huu ni kujenga na mimi na kazi.
Unaweza pia kuwasiliana nami ikiwa una skimu au vifaa vya kupendeza, tumia Barua pepe: [barua pepe inalindwa] (angalau hadi Oktoba 1994)
Ofcourse unaweza kutumia adress sawa kwa maswali mengine au maoni juu ya schematic hii.
Eric van Gorkom
Sehemu ya orodha ya Oscillator FM na BF900
Resistors:
(All resistors ni aina metalfilm isipokuwa R1 ambayo ni resistor kaboni)
R1: 47k, 1/8 W R2: 47k, 1/8 W R3: 47k, 1/8 W R4: 100E, 1/8 W R5: 220k, 1/8 W R6: 100k, 1/8 W R7: 150E, 1/8 W R8: 10k, lin. sufuria
Capacitors:
C1: 100 nF Multilayer au kauri C2: 4.7 pF kauri C3: 100 nF kauri (1 au 10 nF itafanya pia) C4: 40 pf trimmer C5: 4.7 pF kauri C6: 10 pF kauri C7: 22 pF kauri C8: 1 nF kauri C9: 1 nF kauri C10: 100 nF kauri C11: 100 nF kauri C12: 100 nF kauri C13: 47 uF / 25V C14: 1 nF kauri
Inductors:
L1: 4 wdg, dia 8 mm, 1 mm CuAg, nafasi 1 mm; Imewekwa 8 mm juu ya PCB (Viongozi ni 4 mm) L2: ferroxcube wideband HF-choke (6 wdg) L5: 3-shimo ferroxcube wideband HF-choke (6 wdg)
Wengine:
Q1: BF900 D1: BB405, BB102 au sawa (varicaps nyingi zilizo na C = 2-20 pF (takriban) zitafanya) U1: uA78L08, uA7809, uA7810 au sawa (MC78LXX, UC78LXX nk)
bidhaa zetu nyingine:
Kifurushi cha Vifaa vya Kitaalam vya Kituo cha Redio cha FM
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Ingiza barua pepe kupata mshangao
es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Kiafrikana
sq.fmuser.org -> Kialbeni
ar.fmuser.org -> Kiarabu
hy.fmuser.org -> Kiarmenia
az.fmuser.org -> Kiazabajani
eu.fmuser.org -> Kibasque
be.fmuser.org -> Kibelarusi
bg.fmuser.org -> Kibulgaria
ca.fmuser.org -> Kikatalani
zh-CN.fmuser.org -> Kichina (Kilichorahisishwa)
zh-TW.fmuser.org -> Wachina (Jadi)
hr.fmuser.org -> Kikroeshia
cs.fmuser.org -> Kicheki
da.fmuser.org -> Kidenmaki
nl.fmuser.org -> Kiholanzi
et.fmuser.org -> Kiestonia
tl.fmuser.org -> Kifilipino
fi.fmuser.org -> Kifini
fr.fmuser.org -> Kifaransa
gl.fmuser.org -> Kigalisia
ka.fmuser.org -> Kijojiajia
de.fmuser.org -> Kijerumani
el.fmuser.org -> Kiyunani
ht.fmuser.org -> Kikrioli cha Haiti
iw.fmuser.org -> Kiebrania
hi.fmuser.org -> Kihindi
hu.fmuser.org -> Kihungari
is.fmuser.org -> Kiaislandi
id.fmuser.org -> Kiindonesia
ga.fmuser.org -> Kiayalandi
it.fmuser.org -> Italia
ja.fmuser.org -> Kijapani
ko.fmuser.org -> Kikorea
lv.fmuser.org -> Kilatvia
lt.fmuser.org -> Kilithuania
mk.fmuser.org -> Kimasedonia
ms.fmuser.org -> Kimalesia
mt.fmuser.org -> Kimalta
no.fmuser.org -> Kinorwe
fa.fmuser.org -> Kiajemi
pl.fmuser.org -> Kipolishi
pt.fmuser.org -> Kireno
ro.fmuser.org -> Kiromania
ru.fmuser.org -> Kirusi
sr.fmuser.org -> Mserbia
sk.fmuser.org -> Kislovakia
sl.fmuser.org -> Kislovenia
es.fmuser.org -> Kihispania
sw.fmuser.org -> Kiswahili
sv.fmuser.org -> Kiswidi
th.fmuser.org -> Thai
tr.fmuser.org -> Kituruki
uk.fmuser.org -> Kiukreni
ur.fmuser.org -> Kiurdu
vi.fmuser.org -> Kivietinamu
cy.fmuser.org -> Kiwelsh
yi.fmuser.org -> Yiddish
FMUSER Wirless Kusambaza Video Na Sauti Ni Rahisi Zaidi!
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