Bachpan mein walkie talkie se to app sabhi khele hoge, kya apko pta hai ki ye kaam kese krte hai?
1930s mein, sabse pehla walkie-talkie Canadian inventor ne banaya tha. Walkie talkie kuch componenets ki madad se chalta hai jesi ki transmiter, jo message ko bhejta aur recieve krta hai,
antenna jo hawa mein radio waves ko broadcast krta hai aur dusre devices se signals recieve krta hai,
speaker, jispe aap doosri taraf se awaz sun sakte ho,
microphone, jispe apki awaz capture hoti, aur transmitter ke through doosre devices tak jaati hai,
battery, jo pure sysytem ko power deta hai.
Walkie talkie mein ek volume knob bhi hota hai jisse app speaker se nikalne wali awas ko kam ya zada bhi kr sakte ho.Jab aap walkie talkie ke PTT, yani push to talk button ko hold kr ke microphone mein kuch input dete ho ya kuch bolte ho to microphone apke message ko electrical signals mein convert kr deta hai. Aur unn electrical signals ko radio transmitter mein bhejta hai jo usse radio signals mein convert kr deta hai.
Aur ye radio signals antenna ke through hawa mein ek specific frequency pe broadcast hote hai, jisse dusra walkie talkie antenna ke through recieve krta hai, aur signals ko decode kr ke speaker ke through output deta hai.
Ek important point
Dono walkie talkies ko communicate krne ke liye inka ek hi frequency pe hona bhot zaruri hai.
History
1960s mein Citizens Band (CB) radio ke introduction ke saath walkie-talkie technology mein bada badlav aaya, jo logon ko lambi distances tak communicate karne ki suvidha deta tha.
1970s mein, design zyada compact ho gaya, aur yeh mass consumer products banne lage. TVs par Christmas period ke dauran Radio Shack ads chalte the jo Space Patrol walkie talkie ko har bachche ke liye perfect gift batate the: sirf 14.95 dollars mein aap ek pair le sakte the aur… “yeh sach mein kaam karte hain!” ad presenter apne powder blue suit mein emphasize karta tha.
Late 1970s ne Midland ke liye ek important milestone mark kiya: Alan K350 ke saath, humne Europe mein pehla approved CB launch kiya, jiske baad legendary rigs, Alan 68 aur Alan 48 aaye.
1980s mein, technology mein rapid progress dekhne ko mila: mobile phones ka birth hua aur market mein spread hua.
1980s mein Midland ne bhi history banayi Alan 68 (1983) ke saath, jo pehla 34-channel CB tha, aur phir Alan 48 (1986) ke saath, jisme 40 channels the. Us waqt humne Europe mein pehla portable CB bhi produce kiya: Alan 33.
Mobile phones ke aane se telecommunications ka world badal gaya, aur kuch radio frequencies liberalize hui jo sabke liye available ho gayi: is tarah se LPDs (Low Power Devices) ka janm hua, jo short-range communication tools hain aur license ki zaroorat nahi hai. LPDs maximum 69 fixed frequencies aur maximum 10 mW power ka use karti hain.
Pehla LPD Alan 434 tha, aur uske baad European community ke frequency liberalization ke saath PMR446 introduce hua jisme 8 channels aur 0.5 W power hota hai.
1990s se Midland walkie-talkies ne bohot progress kiya, aapke travels, hikes, hunting ya fishing trips, family ke sath fun moments, ya work ke dauran. Hamare engineers ne aise walkie-talkies develop kiye jo 12 km tak range dete hain, paani mein 30 minutes tak survive kar sakte hain, 40 hours tak battery life rakhte hain, aur Mountain Radio Network ke saath outdoor safety ko enhance karte hain.
71 saal ho gaye uss Space Commander walkie talkie advertisement poster ko, society, technologies, aur logon ki needs bilkul badal gayi hain, lekin jab aap ek walkie-talkie uthate hain, tab bhi aap un purane dino ki yaadon ko taza kar sakte hain jab radio ek communication ka ek hi channel tha aur har baar jab aap walkie-talkie ka button press karte the, ek nayi adventure shuru hoti thi!
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