
yesu adii-817

ettavum cheria emf/echf/vhf/uhf multimode general-kavarej amachwar radio traansivarukalil onnaanu yesu efty-817. japanese vertex staanderd korppareshanaanu settu nirmmichirikkunnathu, ithu yesu brandinu keezhil vilkkunnu. intenal baattari paaykk, board keeyar, athinte ool mooad/ool baand kappability, flexible aantina enniva upayogichu, portable upayogathinu settu prathyekichum anuyojyamaanu. yessuvinte adii-857, adii-897 ennivayude samanamaaya surcuted vaasthuvidya adisthaanamaakkiyullathaanu adii-817, athinaal ithu oru vittuveezhcha traansivaraanu, koodaathe athinte savisheshathakal athinte kuranja vilaykk (2001 ll puratthirakkiya 670 dollar) ulkkollunnu.
upgraded cheytha ft-817 (n) d 2004-ll puratthirangi. 5 fixed chaanalukalil (usa model maathram) 60 meter baand kavarej, mattu display lighting oopshanukal, rf ghattatthile parishkkaranangal, ulppeduthiya efnb-85 baattari paaykk, ensie-72bii charger ennivayaanu rund modalukalum thammilulla vyathyasam.
oru qrp traansivaraanu eph. tii-817.
eph. tii-817 (enn) dii ippol uthppaadanathililla, pakaram eph. tii-818 sthaapichu, ithu muun modaline apekshichu 5 vaattil ninnu 6 vaatt aarr. eph outtputtu vardhippikkukayum, uyarnna sheshiyulla baattari, mikacha freekwansi sthirathaykkaayi oru tii. sii. ex. oo ulppeduthukayum cheythu. 2022 desemberil yasu avar adii-818-nte uthppaadanavum nirthukayaanennu prakhyaapichu. 
saankethika vivaranam.
poocha interface.
vishalamaaya kamaandukalulla oru seeriyal portt nalkiyittundu.
surcuted vivaranam.
thaazhepparayunna surcuted vivaranam sevana maanuvalil ninnulla oru udharaniyaanu
arx signalukal oru frond bnc connector vazhiyo pinn uhf zoo-239 connector vazhiyo (yesu ithine oru tharam "emm" connector ennu vilikkunnu) paa yoonittile rile upayogichu inputt cheythekkaam. menu selection upayogichu oro bandinum (echf, 6,2 meter allengil 70 centemeter) thiranjedukkanam. rile marikadakkumbol thiranjedukkunna aantina connectoraanu bii. enn. sii connector.
oru "70cm signal paathu" oru hye paas filter nettvarkkiloode, rf directional coupler/power dittaktar (aareksil allah) vazhi oru pinn-diodylake loow paas filterilekku pookunnu. arx modil iva oof cheythirikkunnu. rx signal pinneedu oru daan235u-loode kadannupokunnu; ithu oru duval diodaanu, yuu. echu. eph. aarr. ex modil aayirikkumbol, anuyojyamaaya diode oonaakkukayum 70 centimeter signal kadannupokukayum signal pinneedu paa boardil ninnu purathupokukayum cheiyunnu. pradhana surcuted boardil 70 centimeter arx signal oru dap236yuu-yilek praveshikkunnu. eee duval diodine athinte vaidyuthadhaara paa yoonittil ninnu labikkukayum 70 centimeter arx mooad sajeevamaakumbol diodukalilonnu oonaakkukayum cheiyunnu. reseaverinte munvashath samrakshanam nalkunna 2 back-tuu-back diodeukal adangiya oru upakaranathiloodeyaanu arx signal kadannupokunnathu. preamplifierinte outtputtu oru helical resonator filterilekku ayaykkunnu. filter cheythathum amplify cheythathumaaya 70 centimeter paathayude outtputtu kadannupokukayum reseave mixerilekku bandhippikkukayum cheiyunnu. 70 centimeter reseavinu, pinn diode bayas pradhana yoonittiloodeyum thudarnnu oru rf-decupler network, oru samanthara-outtputtu shift rajisttar vazhiyum paa unitilekku nalkunnu.
oru "2m signal" oru relayilekk pookukayum thudarnnu signalukal dvigunithamaakkukayum 2m upayogichu oru loow-paas filterilekku pookukayum cheiyunnu. echf-6 meter signal pathayil ninnu 2 meter signaline verthirikkunna hye-paas filter upayogichu signal veendum dipelex cheyyappedunnu. arx signal vhf directional coupler/power dittaktariloode (aareksil upayogikkaatha) oru loow-paas filterilekku kadannupokukayum thudarnnu 2 pinn diodeukal (randum echsu277) kadannupokukayum cheiyunnu. eee diodeukalum anubandha gadakangalum 70 centimeter frond endinu samaanamaayi pravartthikkunna tii/aarr isolation svichukal roopappeduthunnu. 70 centimeter upayogikkaatha pakuthiyiloode kadannupokunna arx signal pinneedu arx rf aouttputtilekku kadannupokukayum thudarnnu pradhana unitilekku kadannupokukayum cheiyunnu. ivide signal oru transformeriloode praveshikkukayum thudarnnu oru varaaktariloodeyum anubandha gadakangaliloodeyum kadannupokukayum 2 meter preamplifieraaya vaidyutha-tyoon cheytha filter/matching network roopappeduthukayum cheiyunnu. preamplifierinte outtputtu 2 electronic tyoon cheytha traansisttarukaliloode kadannupokunnu. oduvil, outtputtu arx mixerilekku pookunnu. 2 meter arx-nuu, pinn diode bayas nalkunnathu paa yoonit tuu 2 meter preamplifier aanu.
"aircraft baand arx paathu (108-154 emhs)" ennathu paa yoonittile 2 meter paathaykk thulyamaanu. pradhana yoonittil, ithu 2 meter signalinte athe bhaagatthiloode kadannupokunnu, ennaal athu 2 meterinu upayogikkaatha diode bhaagatthiloode electronic tyoon cheytha bandpass filterilekku pookunnu. outtputtu arx miksariloode kadannupokunnu. pinn diode bayas nalkunnathu paa yoonittaan, ithu praadhamika traansisttariloode ozhukunnu. aouttputtil, karant nalkukayum secondary traansisttariloode pookukayum cheiyunnu. aircraft baand arx preamplifier upayogichaanu nilavile rund paathakalum poortthiyaakkunnathu.
"doubluefm broadcast baand arx paathu (76-108 emhs)" ennathu paa yoonittile 2 meter paathaykk samaanamaan. pradhana yoonittil ithu 2 meter signalinte athe bhaagatthiloode kadannupokunnu, thudarnnu oru echsc 277 diodiloode. eee signal pinneedu oru soony cxa1611 fm reseiver aisi yude pinn 10 lake pookunnu. aisikk frond end, mixer, iff, demodulation ennivayundu, koodaathe labhicha audiyo nalkunnu. praadeshika oosilettar chorcha thadayunnathinum cheria alavil imej nirasikkal nalkunnathinum, oru varactor oru koyilum tracking bandpass filteringinte oru ghattam nalkunnu. single-chipp reseaverukalkku saadhaaranamaaya eee reseaverinte dynamic shreni moshamaan. oru valia aantina upayogikkumbol, overload/intermode prasnangal pratheekshikkuka.
"echf 6 meterum reseave paathu aanu."rile cheytha sesham loow-paas filter vazhi signal dipelex cheiyunnu. eee ghattathil 2 meter, vimaanavum doubluefm diaplexes cheythirikkunnu. signal thudarunnathu oru loow paas filttariloode kadannupokunnu, nilavile arx freakwensick anuyojyamaaya relakel thiranjeduttha loow paas filterukaliloode rf directional coupler/power dittaktariloode (aareksil upayogikkilla) thudarunnu. loow-, hye-paas filterukalude samyojanam arx frond endelake broadband bandpass filtering nalkunnu. 6 meterinu hye-paas filteril oru preamplifier ulppedunnu (ellaayppozhum 6 meter aareksil upayogikkunnu, aipo menu krameekaranatthe baadikkilla). yukthisahamaya thalangalulla oru pinn diode upayogichaanu uchithamaaya hye paas filter outtputtu thiranjedukkunnathu. pinn diodukalil ninnulla outtputtu pradhana unitilekku ruted cheiyunnu. ivide arx signal duval pinn diode modyoolukalil (tharam dap236yuu) prayogikkunnu. oru paatha rund modyoolukalkkidayil nerittu signal root cheiyunnu, mattoru paatha 10 db paadiloode signal kadannupokunnu-oru menu inamaayi switch inn cheiyunna paadu. outtputtu oru lalithamaaya loow-paas filteriloode mattoru dap 236yuu lake kaimarunnu. aouttputtukalil onnu preamplifierilum mattonn preamplifierine marikadannu diodilum prayogikkunnu. diodinte outtputtu oru if trappil prayogikkunnu. aantinayil ninnulla 68.33 MHz oorjjam 1st iff-lake praveshikkunnathu thadayuka ennathaanu ithinte uddeshyam. echf reseave signal reseave mixerilekku ruted cheiyunnu.
aaksasarikal.
anuyojyamaaya aantina tunerukal.
samathulithavum asanthulithavumaaya feedlineukalkkaayi emtech Zm-2 cheruthum bharam kuranja maanuval Z-maachu tunor
ariyappedunna balaheenatakal.
noonn-end modalil durbalamaaya avasana traansistarukal! avasana ghattathilulla 2sk2975 fettukal valare sensitiivu aanu, uyarnna ezz. dablyu. aarr, overheating, overvoltage allengil volteju peekkukal ennivayaal eluppathil nasippikkaan kazhiyum. randaam modalil yesu (sheershakam) fettukalkku pakaram rd07mvs1 phetts upayogichu, pakshe prashnam ippozhum nilanilkkunnundaakam. rf ghattam kedupaadukalkk sensitiivu aayi thudaraamennu arinjirikkuka.
radio deerghakaalathekku sookshikkanamenkil aantharika baattari neekkam cheyyanam. noonn-end modalil, oru paraajayappedunna baattari finalukalkku aandolanamundaakkukayum athu fettukale nasippikkukayum cheyyum. ithu shariyaakkiyathennaal, eee prashnam thadayunnathinum radioyude aantharika gadakangale nasippikkunna baattari chorchaykku saadhyathayillenn urappakkunnathinum vipulamaaya sambharanathinayi aantharika baattari neekkam cheyyanamennu ippozhum shupaarsha cheiyunnu.