Acquaintance nrog cov fascinating lub ntiaj teb no ntawm tus xov tooj cua, koj muaj peev xwm pib nrog ib tug yooj yim Circuit Court fabrication, uas yuav muab ib tug zoo ob txhais tes-on kev nyob rau hauv lub pib wireless txhawb. Rau starters, koj muaj peev xwm sau ib tug lead ua teeb, nws cov twb ua ib tug zoo kev lig kev cai nyob rau hauv pib xyaum ua xov tooj cua. Nws yog ib qho yooj yim mus ua tau, thiab ua rau nws tau nyob rau hauv cia li ib tug ob peb teev. Qhov no yuav tsum tau ib tug tsawg kawg nkaus thiab pheej yig rau txhua set ntawm qhov chaw thiab, ntawm chav kawm, muaj lub siab xav mus ua hauj lwm. Tus thawj tsab ntes receiver yog txawv nyob rau hauv hais tias nws yog ua tau kom cov kev hloov uas tsis tas yuav mus tsim thiab manufacture rau nws ib tug luam Circuit Court board, nws yog ib qho yooj yim mus teev, vim hais tias tag nrho cov qhov chaw nyob rau haum lub rooj.
Npaj tsim nyog rau qhov siv thiab ua qhov chaw ntawm lub twj paj nruag. Lub ntes muaj ib tug semiconductor receiver point diode (D9, D2), uas yog ib tug ntes. Teeb ntawm capacitors mus rau ib tug ob peb txhiab picofarads, ferrite pas nrig (inch 7-8 hli) hom 400HH, 600HH thiab ib tug ntev ntawm 140 hli. Tsis tas li ntawd nws yog tsim nyog los npaj ib tug hlau cim NDV 1.2 (0,15-18 hli) thiab tej high-resistivity tes kauj kuj tsis tsawg tshaj li 1500 ohms. Tag nrho cov xov tooj cua yuav tsum tau muas ntawm ib tug tshwj xeeb khw.
Tam sim no peb tsom ntsoov rau cov siv thiab ua cov coils rau ferrite pas nrig. No qhov txhab ob peb khaubncaws sab nraud povtseg ntawm xoob ntaub ntawv nyob rau hauv lub ferrite tub ntxhais thiab muab lawv. Yuav tsum tau ib tug tuab ncej, uas muaj peev xwm muab tau yooj yim muab tshem tawm los ntawm tus ncej. Tam sim no peb tuaj poob puv peb puas pre-npaj hlau thiab ua peb ub txhua tsib lem. Cov yuav tsum muaj kev ua yuam kev ntawm cov neeg uas thawj ua rau nws siv lead ua teeb yog hais tias txhua txhua tsib caug lem ntawm cov hlau tom, trimmed thiab obluzhivaetsya. Cia lub lag luam no rau yav tom ntej, nyob rau hauv tus txheej txheem ntawm winding khoov rau ob sab cia li txaus ua thiab mus txuas ntxiv poob cov hlau. Cov uas ua kauj yog tsim nyog los muab daim ntawv lo thiab cia kom qhuav.
Tam sim no peb sau tag nrho cov khoom raws li ib tug yooj yim lub tswvyim. Tag nrho cov retraction ntawm lub kauj thiab cov anode ntawm lub diode yog kev cob cog rua rau lub txais kav hlau txais xov. Lwm huab retraction xa mus rau hauv av thiab ib tug ntawm cov lub mloog pob ntseg outputs. Qhov thib ob davhlau ya nyob twg ntawm lub mloog pob ntseg yog kev cob cog rua rau lub cathode ntawm lub diode. Txhua yam koj tau sau rau koj tus thawj lub xov tooj cua nrog nws tus kheej txhais tes. Yog hais tias tag nrho cov receiver circuits tau koom ua ke kom raug, nws pib ua hauj lwm sai li sai tau. Qhov chaw ntaus ntawv yog mob los ntawm kev hloov tus xov tooj ntawm koj lem rau lub kauj thiab xaiv cov capacitor uas yog kev cob cog rua thaum uas tig mus rau lub headphones. Nrog rau qhov no peb ua tau qhov zoo tshaj plaws lub suab.
Xws li ib tug receiver yog zoo thawj lwm tus xov tooj cua noj kev khiav hauj lwm nyob rau hauv MW, LW. Cov kauj ruam tom ntej tej zaum yuav zus tau tej cov ib, ob, thiab ib tug cascade ntawm receivers uas yuav coj ib tug ntau dua nyob deb tooj ntawm qhov chaw nres tsheb. Thiab nyob rau hauv lub sij hawm ntev yuav ua tau ib PP receiver uas txiav pom qhov chaw nres tsheb thiab khw muag khoom nws. Qhov ntau complex lub tswvyim ntawm tus dais, lub ntau dua nws nteg. Tab sis rau kom zoo teeb ntawm lub receiver yog tsim nyog los muaj nyob rau hauv koj lub tsev lab ib tug zoo kev kuaj cov khoom, siab zaus generator, ib tug oscilloscope, etc.