RF Technical Guides

  • Radio History of Chicago : How it Develops Since 1900s?

    Xov tooj cua keeb kwm ntawm Chicago: Yuav ua li cas nws tsim txij li thaum 1900s?

    Qhov no yog ib qho kev nthuav dav rau Chicago xov tooj cua keeb kwm, koj yuav kawm los ntawm AM thiab FM keeb kwm ntawm Chicago txij thaum 1900s txog 1990s. Mus ntsib tam sim no thiab kawm ntxiv!

    los ntawm/

    6 / 1 / 22

    873

  • Discone Antenna 101 - All Your Concerns Answered in One Area

    Discone Kav hlau txais xov 101 - Tag nrho koj cov kev txhawj xeeb teb hauv ib cheeb tsam

    Xav tias dab tsi pab koj tshawb xyuas huab cua lub vev xaib kev khiav tsheb lossis taug qab cov terminals tiav? Nws yog Discone Antenna. Tam sim no, xav tias koj nyob hauv qab no, peb tab tom xav tias koj tsis muaj ntau yam lus qhia txog tus kav hlau txais xov no txawm li cas los xij.

    los ntawm/

    5 / 11 / 22

    1180

  • How To Bond Ground Rods With Exothermic Welding?

    Yuav Ua Li Cas Bond Av Qws Nrog Exothermic Vuam?

    Hauv tsab xov xwm no, kuv yuav qhia koj tias yuav ua li cas siv CADweld uni-shot rau exothermically khi koj cov ncej hauv av. Txoj kev no ntawm kev sib txuas hauv av cables rau koj cov pas nrig hauv av, tsis txhob xeb, thiab tseem muaj kev sib txuas siab rau koj cov pas nrig hauv av. 

    by/ Bond Ground Rods Nrog Exothermic Vuam

    4 / 25 / 22

    717

  • How to Build a Turnstile Antenna for Satellite Communication

    Yuav ua li cas los tsim ib lub Turnstile kav hlau txais xov rau satellite kev sib txuas lus

    Txoj cai ntawm no yog lub tsev thiab tsim cov phiaj xwm ntawm Turnstile kav hlau txais xov uas kuv siv rau qhov chaw sib txuas lus ntawm 2 meter amateur xov tooj cua band.

    by/ Tsim ib tug Turnstile kav hlau txais xov rau satellite kev sib txuas lus

    4 / 25 / 22

    1185

  • CB Radio vs HAM vs Walkie Talkie vs GMRS

    CB Radio vs HAM vs Walkie Talkie vs GMRS

    Cia nws ua CB Radios, HAMS, Walkie talkies, lossis GMRS, lawv yog cov kev xaiv zoo rau cov xov tooj. Koj puas xav txuas nrog koj tsev neeg thiab cov phooj ywg thaum tus neeg teb xov tooj tsis them koj cov nuj nqis? Zoo, cov no yog cov khoom koj yuav tsum xaiv rau.

    los ntawm/

    4 / 25 / 22

    992

  • How To Build A 2 Meter Vertical Antenna?

    Yuav Ua Li Cas Tsim Ib 2 Meter Vertical Antenna?

    Yog hais tias cov kav hlau txais xov ntsug qub tau poob nws cov radials thiab tsis tuaj yeem tawm tsam ntau lub xov tooj cua amateur repeaters nyob ib puag ncig, koj yuav tsum tau tsim 2 meter 1/4 nthwv dej ntsug kav hlau txais xov rau 146 mHz. amateur xov tooj cua band. Thiab ntawm no yog phau ntawv qhia rau koj.

    los ntawm / yuav ua li cas los tsim ib lub kav hlau txais xov ntsug

    4 / 25 / 22

    1436

  • How To Build A 2 Meter Antenna For Bicycle Mobile?

    Yuav Ua Li Cas Tsim Ib Lub 2 Meter Kav hlau txais xov rau Tsheb kauj vab txawb?

    Tej zaum qhov teeb meem loj tshaj plaws ntawm kev coj koj lub tsheb kauj vab HT yog xav txog lub kav hlau txais xov tsim nyog ntawm koj lub tsheb kauj vab. Qhov no yog vim lub tsheb kauj vab tsis muab ntau lub dav hlau hauv av. Nov yog cov phiaj xwm rau lub kav hlau txais xov uas nws tau piav qhia hauv tsab ntawv tshaj tawm.

    by/ Tsim ib lub kav hlau txais xov rau Tsheb kauj vab Mobile

    4 / 24 / 22

    850

  • How To Construct a J-Pole Antenna for the 70cm Ham Band

    Yuav Ua Li Cas Tsim Ib Lub Kav Hlau J-Pole rau 70cm Ham Band

    Ntawm no yog tus nqi-zoo J-ncej kav hlau txais xov uas yooj yim heev los tsim.Hais txog lub sijhawm teev, nrog rau txog $ 10 zoo tsim nyog ntawm cov ntaub ntawv, koj tuaj yeem muaj qhov zoo kawg nkaus ua tiav omnidirectional j-ncej kav hlau txais xov.

    by/ Tsim ib tug J-pole kav hlau txais xov rau Ham xov tooj cua

    4 / 24 / 22

    920

  • Develop a Phasing Harness for Piling Antennas

    Tsim Phasing Harness rau Piling Antennas

    Tsis ntev los no, ntawm qhov chaw ua haujlwm, kuv muaj peev xwm ua tau (los yog yuav tsum tau) los ua ib txoj hlua khi rau ob lub kav hlau txais xov. Txawm li cas los xij, kuv muaj teeb meem. Kuv nyob online ob peb xyoos rov qab los yuav ua li cas ua qhov no rau kuv qhov xwm txheej ntawm tus kav hlau txais xov, hnub no lub vev xaib tau ploj mus! Yog li kuv yuav tsum paub nws ntawm kuv tus kheej. Tom qab ntau teev ntawm kev tshuaj xyuas kuv cov ntawv (tsis zoo heev), kuv pom nws tawm.

    los ntawm/

    4 / 22 / 22

    780

  • Just How to DIY an NVIS Antenna AKA Cloud Burner Antenna Utilizing a Mag Mount

    Tsuas yog Yuav Ua Li Cas DIY NVIS Kav hlau txais xov AKA Huab Burner Kav hlau txais xov siv Mag Mount

    Ib feem ntawm kev ua tus tsav tsheb hauv xov tooj cua yog muab kev sib txuas lus thaum muaj xwm txheej ceev. Nrog rau hnub tom ntej Ohio NVIS Kav hlau txais xov, kuv tau xaiv los saib rau hauv NVIS antennas. NVIS cov kav hlau txais xov, ntxiv rau hu ua Zej Zog Zej Zog Skywave antennas muaj lub kaum sab xis ntawm hluav taws xob. Ib yam dab tsi ntawm qhov kev txiav txim ntawm 60 degrees, ncaj qha mus rau 90 degrees. Tsis zoo li UHF thiab VHF cov cim qhia, uas ib txwm muaj 50-mais ntau yam nrog yagi kav hlau txais xov nce siab, thiab tseem NVIS kav hlau txais xov yog tsim rau kev sib cuam tshuam hauv 75-- 500-mais ntau yam. Qee lub sij hawm tus kav hlau txais xov NVIS tau raug hu ua "huab cua sov" vim nws txoj kev ntau ntawm nws cov hluav taws xob nce siab dua li lub kav hlau txais xov tsis tu ncua.

    los ntawm/

    4 / 22 / 22

    786

  • Do It Yourself Your Own Equipment Shelf with an Absence Table - LackRack

    Ua Koj Tus Kheej Koj Tus Kheej Cov Khoom Siv Txiaj Ntsig nrog Lub Rooj Tsis Muaj - LackRack

    Tsis ntev los no kuv xav tau 19 ″ cov khoom khib nyiab. Tab sis ua pheej yig, kuv txiav txim siab los tsim ib qho. Thaum tshawb hauv Is Taws Nem, kuv pom qhov hu ua LackRack, uas siv IKEA's Lack Table. Txawm li cas los xij ntxiv kev nyeem ntawv tau nthuav tawm ob peb yam uas kuv xav tias tsis muaj tus qauv tsim ntawm LackRack.

    los ntawm/

    4 / 22 / 22

    741

  • Just How to Mount Devices into a 19 Inch Shelf

    Tsuas yog Yuav Ua Li Cas Mount Devices rau hauv 19 Nti Txee

    Txij li yuav luag tag nrho 19 '' khoom racks Siv 10-32 screws nyob rau hauv lawv sab rails, muab ob tug ntawm lawv thiab muab ob tug 10-32 txiv ntseej rau ntawm lub hau, thiab jam rau lawv ua ke. Tom qab ntawd clamp tag nrho cov khoom nyob rau hauv ib lub vise.

    los ntawm/

    4 / 21 / 22

    1139

  • How to DIY a Shortened 20 thru 40 Meter Vertical for POTA

    Yuav ua li cas DIY lub Shortened 20 mus rau 40 Meter Vertical rau POTA

    Muaj qee yam nthuav txog kev ua POTA ua kom koj taug kev nrog tag nrho koj cov iav hauv ib pob thiab tseem ua rau lub tiaj ua si khiav QRP lub zog.

    los ntawm/

    4 / 21 / 22

    1032

  • How to Build a DIY 2 Meter J-pole Antenna

    Yuav Ua Li Cas DIY 2 Meter J-pole Kav hlau txais xov

    Yog tias koj tab tom nrhiav tus nqi qis, nrog rau yooj yim los tsim cov kav hlau txais xov, J-ncej kav hlau txais xov yog qhov zoo! Hais txog ib teev sijhawm, nrog rau txog $ 15 tus nqi ntawm cov khoom, koj tuaj yeem muaj qhov ua tau zoo omnidirectional j-pole kav hlau txais xov.

    by/ DIY J ncej kav hlau txais xov

    4 / 20 / 22

    1558

  • What is Broadcasting and How it Works? - FMUSER

    Kev tshaj tawm xov xwm yog dab tsi thiab nws ua haujlwm li cas? - FMUSER

    Kev tshaj tawm yog dab tsi thiab vim li cas koj yuav tsum saib xyuas? Nov yog daim ntawv qhia tag nrho txog kev tshaj tawm xov xwm los ntawm FMUSER, suav nrog nws yog dab tsi thiab nws ua haujlwm li cas. Mus tshawb nrhiav!

    los ntawm/

    8 / 24 / 22

    1209

  • A Brief Intro to Broadcast Production Technology - FMUSER

    Luv luv Intro rau Kev Tshaj Tawm Tshaj Tawm Technology - FMUSER

    Dab tsi yog tshaj tawm cov tshuab tsim tawm thiab vim li cas koj yuav tsum saib xyuas? Ntawm no yog cov ntaub ntawv tiav txog dab tsi yog tshaj tawm cov thev naus laus zis ntau lawm thiab qee yam yooj yim ntawm nws. Mus tshawb nrhiav!

    los ntawm/

    4 / 6 / 22

    1066

  • Complete Radio Station Equipment Package You Should Have for FM Broadcasting

    Ua kom tiav cov khoom siv hauv xov tooj cua koj yuav tsum muaj rau FM tshaj tawm

    Muaj pes tsawg hom khoom siv tshaj tawm hauv xov tooj cua ua tiav, thiab cov cuab yeej tshaj tawm no ua haujlwm ua ke li cas. Qhov twg yuav cov khoom tshaj tawm tshaj tawm? Nplooj ntawv no yuav teb cov lus nug no.

    by/ Ua kom tiav cov khoom siv tshaj tawm FM

    7 / 27 / 22

    1510

  • RF Filter in Radio Broadcasting

    RF Lim hauv xov tooj cua tshaj tawm

    Hauv kev sib txuas lus hauv xov tooj cua, RF lim yog cov khoom siv hluav taws xob tseem ceeb heev. Hauv xov tooj cua signals kis tau tus mob, yuav ib txwm muaj bands peb tsis xav tau, xws li ib co tsis tsim nyog spurious signals; los yog tej zaum yog vim li cas tshwj xeeb, peb tsis xav tau qee qhov ntau zaus hauv xov tooj cua signals. Lub sijhawm no, peb yuav tsum tau lim tawm qhov tsis xav tau ntau zaus los ntawm RF lim. Yog li yam khoom siv hluav taws xob zoo li cas Lub lim RF thiab vim li cas nws thiaj tseem ceeb? Qhov kev qhia no yog los teb cov lus nug no.

    by/ Dab tsi yog RF Filter

    7 / 29 / 22

    1843

  • DIY an FM Radio Dipole Antenna | FMUSER BROADCAST

    DIY xov tooj cua FM Dipole Kav hlau txais xov | FMUSER BROADCAST

    FM dipole kav hlau txais xov yog qhov yooj yim tshaj plaws thiab ntau hom kav hlau txais xov, yog li nws yooj yim rau txhua tus los ua lawv tus kheej, uas tsuas yog xav tau qee yam khoom siv yooj yim. DIY FM dipole kav hlau txais xov yog qhov ua tau zoo thiab tus nqi qis yog tias koj lub xov tooj cua xav tau lub kav hlau txais xov ib ntus. Yog li yuav ua li cas DIY ib FM dipole kav hlau txais xov? Tsab ntawv yuav qhia rau koj.

    by/ FM Kav hlau txais xov DIY

    5 / 11 / 22

    2767

  • How to Find the Unused Frequency for FM Radio Transmitters?

    Yuav Ua Li Cas Pom Qhov Tsis Siv Neeg Zaus rau FM Xov Tooj Cua Transmitters?

    FM xov tooj cua transmitters yog ib txoj hauv kev yooj yim tshaj plaws thiab pheej yig tshaj los mloog koj lub xov tooj ntawm tes suab paj nruag. Tab sis rau tus neeg tshiab, nws yuav nyuaj me ntsis los nrhiav qhov tsis muaj kev cuam tshuam. Yog tias koj muaj teeb meem hauv kev nrhiav FM zaus tsis siv, qhov kev qhia no yuav pab tau rau koj.

    by/ Nrhiav Tsis siv FM zaus

    9 / 21 / 21

    5260

  • How to Make a Printed Circuit Borad? | PCB Manufacturing Process

    Yuav Ua Li Cas Sau Circuit Court Borad? | PCB Manufacturing txheej txheem

    PCB, tseem hu ua pawg thawj coj saib xyuas, yog ua los ntawm cov khoom siv sib txawv rau kev txhawb nqa lub cev thiab kev sib txuas ntawm cov khoom sib txuas ntawm lub qhov (socket). Tab sis dab tsi yog lub luag haujlwm ntawm cov ntawv luam tawm Circuit Board? Yuav ua li cas luam tawm Circuit Board? Nyeem cov ntsiab lus hauv qab no kom paub ntau ntxiv.

    by/Yuav ua li cas los ua ib tug PCB Board

    10 / 29 / 21

    1986

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