VHF kav hlau txais xov nrog koj ob txhais tes: tus kheej-ua tsim

VHF kav hlau txais xov - ib tug ntaus ntawv uas yog npaj rau tau txais tawg. Cov kev hloov kho yuav tsuas ua hauj lwm nrog luv luv Pib ntsais koj teeb. Qauv nrog ib leeg txawv nyob rau hauv zaus. Kav hlau txais xov rau FM xov tooj cua rau koj tus kheej ob txhais tes mus tshaj cov lus qhia. Nyob rau hauv cov ntaub ntawv no, nws yog ib qho tseem ceeb yuav tau xav txog lub hom receiver. Nyob rau hauv tas li ntawd, nws yuav tsum tau muab sau tseg hais tias muaj ntau hom kev antennas, uas txawv nyob rau hauv cov qauv thiab tsis.

Tus qauv rau tej yam yooj yim receiver

Muaj yog ib qho kev kav hlau txais xov rau FM receiver nrog koj ob txhais tes ntau zaus nyob rau ntsug kev muag zaub. Nyob rau tib lub sij hawm nws sib npaug zoo siv ib tug me me ntev. Yuav kom txhim kho tau qhov tug siv vuam inverter. Feem ntau tua mast, uas yuav pab tau kom them nyiaj yug. Nws txoj kab uas hla yuav tsum muaj tsawg kawg yog 1.2 cm. Rau amplification ntawm lub txais tos lub teeb liab siv reflectors. Muaj ntau cov kev hloov uas khib teem rau ntawm ib tug me ntsis lub.

Lub hauv paus ntawm lub kav hlau txais xov yuav tsum tau ua nrog ib tug overlay. Nyob rau tib lub sij hawm balances muaj cai sau rau daim kab xev. Kws txawj hais tias lub steel raj haum zoo. Rau cov qauv nrog ib tug tsis zoo coj yog thov Reflector. Hais tias lub caij yog mounted rau ntawm ntug ntawm lub mast.

Ib tug ntaus nrog ib tug khib

Kav hlau txais xov rau FM xov tooj cua rau koj tus kheej ob txhais tes yog ua li cas nrog ntau frequencies. Cov qauv ntawm ib tug txawv conductivity nqi thiab nce. Thaum assembling lub tsev nws yog ib qho tseem ceeb los npaj ib tug khoom mast. Kws txawj qhia kom siv hollow khib nrog me me tes taw hnyav li. Inch nws yuav tsum muaj tsawg kawg yog 2.2 cm. Yog hais tias peb xav txog ib tug qauv rau tsawg zaus receivers, lub counterweights yuav tau xaiv los ntawm ib tug stainless hlau. Nws yog tsis tsim nyog rau nruab hauv ob sab phlu.

Reflector antennas yog siv tau nyob rau txawv frequencies. Nyob rau hauv kev ua lag luam ntawm heev kev hloov kho mus rau lub petals. Lawv muaj ib tug siab nce. Txawm li cas los, nws yuav tsum tau muab sau tseg hais tias lawv tsis yooj yim rau tsim rau lawv tus kheej. Lub pem hauv ntej nres yuav hlawv nyob rau kev siv ib vuam inverter. Cov npoo ntawm cov kav hlau txais xov yuav tsum tau ua tib zoo sanded. Racks yuav siv nrog lub cheeb ntawm 0.3 cm. Rau combating resonance mem tes cuam siv tshwj xeeb reflectors uas muaj conductivity. Qauv nrog kab rov tav nres no yog ua los nrog tsuas yog ib mast.

Model nrog ob racks

Nrog ob racks VHF kav hlau txais xov nrog koj ob txhais tes mus rau hauv lub thoob plaws mast. Qauv ntawm no hom yog haum rau ntau yam series receivers. Feem ntau, ib tug muaj nqis ntawm kuj qauv, lawv yuav tau ua hauj lwm nyob rau ntawm lub frequencies saum toj no 300 MHz. Muaj ntau pab kiag li lawm siv ntau yam reflectors. Thaum lub sij hawm los ua ke ntawm tus qauv yuav tsum nyob rau hauv lub central mast. Raws li ib tug txoj cai, tshwj xeeb siv ib tug me me txoj kab uas hla raj nrog sharpened xaus. Nws yuav tsum raug sau tseg hais tias muaj qauv nrog lub tswv yim. Wherein counterweights yuav mounted ntawm ces kaum sib txawv. Lub NQHAJ ntev nyob rau hauv ib tug yooj yim kav hlau txais xov yog sib npaug zos rau 22 cm.

Yuav kom nce lub nce, steel hlab siv. Muaj kuj yog ib tug nrov plig plawg kev hloov kho. Lawv khiav lag luam ntawm ib zaus ntawm 200 MHz. Kev taw qhia ntawm kev txiav txim los ntawm lub kav hlau txais xov tej zaum yuav txawv. Lub sab ib feem ntawm tus dais no yog raug rho tawm khib. Lub Reflector yuav tsum zoo tsau. Lub counterweight tej zaum yuav mounted nyob rau hauv ib tug kab rov tav txoj hauj lwm.

Nws yuav tsum tau muab sau tseg tias nyob rau hauv thiaj li yuav kov yeej cov theem suab nrov yuav tsum tau siv cov elongated reflectors. Mast rau mas siab loads. Antennas ntawm no hom yog zoo heev nyob rau negative polarizations. Txawm li cas los, nyob rau hauv cov ntaub ntawv no nws yog tsim nyog los noj mus rau hauv tus account lub hom receiver thiab lub zaus txwv.

kab rov tav antennas

Kab rov tav antennas muaj peev xwm yuav tau koom ua ke nrog counterweights ntawm ntau daim. Tej yam yooj yim hloov no yog ua los rau cov kab Masts. Muaj kuj yog ib tug ntau ntawm cov high-zaus pab kiag li lawm, uas yog manufactured nrog linear Reflector, uas yog mounted rau hauv qab ntawm lub khib. Kab rov tav antennas muaj lub siab impedance ratio. Lawv yog cov tau khiav lag luam ntawm ib zaus ntawm 200 MHz.

Muaj ntau cov qauv yog nruab nrog ob counterweights. Nyob rau hauv rooj plaub no tus mast yog siv los ntawm 1.2 cm nyob rau hauv txoj kab uas hla. Ib txhia yog haum rau siv nrog tsev receivers. Lawv muaj ib tug siab coefficient ntawm sawv yoj. Racks feem ntau teem rau ntawm ib txoj cai kaum sab xis. Counterweights yog cia li nyob rau hauv pem hauv ntej ntawm lub ntaus ntawv.

ntsug kev hloov kho

Vertical antennas muaj peev xwm ntawm kev khiav hauj lwm nyob txawv frequencies. Modifications ntawm no hom muaj lub siab amplification tau. Nws yog ib tug ntsug VHF kav hlau txais xov yog yooj yim heev rau hauv xov tooj cua nrog nws tus kheej txhais tes. Ua ntej peb yuav tsum tau xaiv ib tug zoo bar, los npaj ua ntej vuam inverter. Yuav kom daws tau cov teeb meem nrog tsis zoo polarization yog pom zoo kom siv mem tes reflectors. Nyob rau tib lub sij hawm balances xav tau rau nruab ib tug loj ntev thiab txoj kab uas hla lawv yuav tsum tsis txhob yuav tsawg tshaj li 0.3 cm. Yuav txhim khu qhov kev tsom xam ntawm cov ntxaij lim dej yog muaj ntaub ntawv. Lub pem hauv ntej lub rooj zaum tsuas yog ntsia ntawm lub kaum sab xis ntawm 45 degrees. Txawm li cas los, nws yog tsim nyog los ua ntej-xam cov mast zog.

Yuav kom nce lub ruaj ntseg ntawm lub hauv paus qauv yuav tau ua nrog lub abutments. Nws yog ib lub FM kav hlau txais xov rau hauv xov tooj cua nrog lawv ob txhais tes tsuas nrog luv luv studs uas yuav tsum tau ntsia ntawm ib tug tsawg qhov siab. Counterweights tso cai mus dag rau cov bar. Nws yuav tsum saib xyuas ntawm lub linings. Tshwj xeeb mloog yog muab mus rau sab ntawv tshawb fawb, uas yog tsau mus rau lub mast. Yuav kom nce lub cheeb tsam ntawm dispersion pom zoo khib ntawm 25 cm ntev.

Lub apparatus 144 MHz

VHF kav hlau txais xov ntawm 144 MHz nrog lawv tus kheej txhais tes yog ib tug ncaj los nkhaus bar. Mast nyob rau hauv cov ntaub ntawv no yog ntaub ntawv nrog oblique abutments. Nyob rau hauv tej rooj plaub, siv pulsed reflectors. Nws yog ib lub UHF kav hlau txais xov 144 nrog nws ob txhais tes mus rau sab uprights. Cov qib siab ntev ntawm txoj kev txhawb zog yog sib npaug zos rau 15 cm. Cov pem hauv ntej uas muaj feem siv los ua rau kom lub qhov nce. Raws li ib tug txoj cai, lawv muaj kev txhawb nrog straps. VHF kav hlau txais xov ntawm 144 MHz nrog koj ob txhais tes yog ua li cas nrog rau ib los yog ob tug lawm.

Kev hloov kho ntawm 145 MHz

VHF kav hlau txais xov 145 MHz nrog lawv ob txhais tes ua luv luv mast. Feem ntau cov kev hloov uas pom tau hais tias yuav peb tug ncej. lub nce ntawm cov qauv yog heev siab heev. Runners los ntawm antennas siv nrog mem tes reflectors. Lub pem hauv ntej cov kabmob yuav tsum tau teem caij tsuas yog txhais tau tias ntawm ib tug vuam inverter. Nyob rau hauv cov qauv ntawm cov siab directivity. Kws txawj hais tias lub kav hlau txais xov yog tau tso cai los mus ua kom ib tug nkhaus mast.

Model nrog tooj liab mast

Muaj yog ib qho kev kav hlau txais xov rau cov UHF band nrog lawv tus kheej txhais tes nrog reflectors ntawm txawv frequencies. Tug ncej tej zaum yuav muab ntsia tau rau muaj los yog tsis straps. Ib txhia kev hloov kho yog ua nyob rau hauv lub sab racks. Antennas manufactured uas muaj kev tawg ri niab coefficient. Thawj mounted mast. Counterweights yuav mounted ntawm ib tug me ntsis lub.

Lub zoo txoj kab uas hla struts yog 1.2 cm. Nyob rau hauv rooj plaub no tus mast yog advisable siv ib tug muaj zog paus. Yog hais tias peb tham txog cov Reflector, nws yog tsim nyog los siv tus mem tes los yog lub hlau hom. Mus ua ib tug yooj yim qauv siv plaub counterweights. Tas soldered siv ib vuam inverter. Ntxiv mus, yuav ua rau tus ntaus ntawv nrog koj ob txhais tes, mounted muab faib nyob rau hauv lub mast. Nce dissipation cheeb tsam yuav ua tau tiav los ntawm txoj kev sab struts.

Devices nrog steel mast

Nyob rau ib tug steel mast VHF kav hlau txais xov yog ua rau lawv tus kheej txhais tes nrog oblique retinaculum. Counterweights ntsia, feem ntau rau ntawm ib sab. Ib cov kws txawj pom zoo kom siv cov tw tshev nrog ib lub cheeb ntawm 2.2 cm. Yuav txhim khu qhov kev tsom xam ntawm lub ntaus ntawv yog muaj ntaub ntawv mem tes Reflector, uas yog kev txhawb ntawm hauv paus ntawm lub kav hlau txais xov. Yuav kom txuas tus qauv siv hlau los ntawm lub mast. Nws tseem yog nqi sau cia hais tias muaj li nrog sab lobes. Lawv muaj ib tug siab conductivity.

Devices rau cov uas tsis rhiab heev receivers

Receiver rhiab heev rau cov uas tsis VHF kav hlau txais xov nrog koj ob txhais tes mus yooj yim heev. Thawj kauj ruam yog tua mast, uas yog txuas mus rau sab kev muag zaub. Counterweights yog feem ntau siv nrog oblique ntawm cov. Match yog tsim los nrog muaj zog puag. Nyob rau hauv cov qauv ntawm cov hom yuav tsum tau siv wired Reflector. Counterweights tej zaum yuav ntsia tau rau hauv ib tug kab rov tav txoj hauj lwm. Rau amplification ntawm lub nce yog tso cai rau mount lub strut ntev txoj kab uas hla ntawm 2.2 cm.

Qauv rau cov rhiab heev receivers

Rau cov ntaub ntawv receivers VHF kav hlau txais xov rau 430 MHz ob txhais tes nws yog ua li cas nrog ib tug hlau mast. Ib txhia kws txawj ntseeg tau pom zoo kom siv xwb ib tug nkhaus khib. Nyob rau hauv cov ntaub ntawv no, lub counterweights yuav tsum tau tsau nyob puag ncej. Pa VHF kav hlau txais xov nrog koj ob txhais tes yog ua li cas nrog ntau hom reflectors.

Pib modifying los ua ke tsim nyog rau kev ruaj ntseg hauv lub mast thiab tawm nyob ntawm tej mus cuag. Ntxiv mus, yuav ua rau tus ntaus ntawv nrog koj ob txhais tes yuav tsum tau txiav plaub tug nrog ib lub cheeb ntawm 2.2 cm. Cov qauv nyob rau hauv lub 200 MHz yuav tsum ua tau peb sab racks. Counterweights yuav muab ntsia tau rau ntawm lub kaum sab xis ntawm 45 degrees. Tug ncej yog mounted rau hauv qab ntawm lub mast.