One day, I'll see a video showing the correct way to align one of these Chinese radio kits. Goodness knows what all that fiddling with the slugs from about 10 minutes onwards was for, other than to misalign transformers that probably were best left alone. A signal generator is useful but not necessary as all alignment can be done on a "weak but stable" off-air signal. I've built several of these kits, including this particular model (and they've all worked well). ♥ Every Chinese kit I've built came with pre-aligned IF transformers. They were almost spot-on, and only needed a slight tweak when the set was up and running. If you've built the kit correctly, it should be receiving at least some signals without further alignment. If it doesn't, then check the wiring, look for solder bridges and dry joints, and check the circuit voltages before you go adjusting anything. The general rule: adjust coils at the low frequency end, and capacitors at the high. The trimmer capacitors are those little screws on the back of the main tuning capacitor. When the set is receiving signals, it's necessary to align the front end to obtain optimum sensitivity over the whole range. Tune the radio to a signal near the bottom of the band. Then slide the coil back and fourth on the ferrite rod to obtain best results. Then you do the same with a signal at the top end of the band: only, this time, the adjuster will be one of the trimmers on the back of the main tuning capacitor. One adjusts sensitivity, and that's the one to adjust. Then repeat the coil adjustment and, when no further improvement is obtained, secure the coil on the ferrite with a little wax or glue. Final step is to adjust dial calibration. Again, coil at the low end, capacitor at the top. This time, you need to adjust the oscillator coil (the can with the red slug) so that the dial markings are correct for a station of known frequency at the low end. Then repeat the procedure for a station at the top end, only this time, adjust the OTHER trimmer on the main tuning capacitor. Repeat a few times until calibration is correct (as close as it can be on a simple dial like these). THEN you can try a slight tweak to the IF transformers, though that probably won't make much difference. Happy listening! ☺♥
We made two of these. A six-transistor one and a seven-transistor one. I guided my 10 year old son through it. He learned how to solder. The instructions were in Chinese... I had to learn the Chinese character for the color white - to figure out where to put in the IF cans. Luckily there was a Rosetta stone: a table of resistor color codes.
@@jeromekaidor7254 That's how I did it! But that was before Google translate could do images - now you can just scan the instructions and Google translate should (hopefully!) give a reasonable translation. I've done a couple of the six and seven transistor ones, and one in a similar case that used an MK484 / TA7642 IC rather than a superhet circuit.
Já montei um rádio quando estudei no Instituto Universal Brasileiro Curso de Eletrônica, isto nos anos oitenta, passei muito tempo estudando pra poder ir recebendo as peças para concluir a montagem. Tudo isso por correspondência. Foi legal!
United States, Ohio to be specific. I doubt I’ll win the contest but it wouldn’t stop me from learning great tips and tricks as I always do from your channel. You are an inspiration for many. I assure you. God Bless and keep up the great work.
Professionally , it is unacceptable to tune resonant oscillating circuits , regardless of whether they are intermediate frequency or heterodyne with a screwdriver , it must be made of non-magnetic material ! Greetings from Bulgaria !
Yes You do! 😊 I've been listening sw stations from India in Finland! (i have a hobby of dx-radio listening) 👍 ..but it needs better radio and antenna than this!😅
Not to brag or anything, but I cAmazing stunt. His daughter has the best manners. David your best performance is you raising a fine human being. All stunts you do are impressive. Following you for a long time now. The Best.hanged the lightbulb in my hallway while standing on a kitchen chair last week.
When I was young, we had one weak AM rock and roll station (5000 Watts and 120 miles distant) that I always listened to and one local AM station that always came in very strong. I really only listened to those two stations. Had I known then, I would have just tuned the radio circuitry for the best sensitivity on the weak station with the IFs tuned to 455KHZ and left it at that. Would have also incorporated a tuned long wire outside antenna to inject more signal into the radio's front end, which is easy to do. Just make sure the outside antenna is lightning protected- I've seen many old radios that used outside antennas exclusively for reception with antenna coils burnt open from the antenna not being protected.
Excellent. You have given me the confidence to get started on my kit. I am hoping the test points on final check will get me close I don't have a signal gen. You have been a big help. Subscribed.
Unfortunately nowadays it is very rare to hear the radio, Unfortunately nowadays it is very rare to hear the radio, Unfortunately nowadays it is very rare to hear the radio, Moreover, AM signals. But this video tutorial is very good and helpful for beginners who are learning
As other posts have said, you're just twiddling stuff! The proper way to do it: Set the IFs to 455 kHz (or whatever they are.) If you can't adjust them with a 455 kHz source, leave them alone and hope they are adjusted properly already. Go the HF end of MW and adjust the trimmer slot on the variable cap that tunes the stations. There are 2 trimmers, use the one that tunes stations and adjust it to bring a station on the correct frequency on the HF end of the dial. Tune to LF end and adjust the red core on a station to bring it to the right place. Back to HF end and repeat HF procedure. Once calibration is correct adjust sensitivity by peaking signal strength on LF end by sliding coil on ferrite rod, and on HF end by adjusting the other trimmer capacitor on the main tuning cap.
I concur 100% with that. I am from Argentina, and before 1978's football world championship, radios were so expensive that I bought a lot of kits and put them together, to sell. I had experience with valve radios too, and I can tell with perhaps 98% of certainty that the IF coils were always tuned right out of the factory.
Cara merakit yang sangat bagus, didukung peralatan yang lengkap,, tahun 1990 saya merakit radio MW SW SUPER HETERODYNE...Merakit mengandalkan solder dan AVO METER ,,, Bongkar pasang bagian trafo Oscilator merk SUMIDA SIA
Terima kasih buat lembaga pendidikan kejuruan Kartini. Di jln Muwardi Grogol jkrtbrt .barokah belajar selama 1 th bisa punya ketrampilan buat bekal sampai saat ini
Lamentablemente , ya no hay emisoras am , por lo menos aqui en chile...años atras , la radio am hacía furor. Hoy en dia, las pocas que quedan , son utilizadas por grupos evangélicos...se extraña aquella época...
Właśnie kupiłem i czeka zestaw na złożenie. Zamierzam zrobić tam modyfikacje, żeby radio było energooszczędne 3mA max na minimum głośności i odbiór krajowej radiostacji na falach długich (LW).
покупал такой на алихе голубенький, лет пять назад...собрал, включил - он работает....ничего не крутил, не подбирал токи каскадов (хотя мерил - они с этими номиналами резисторов не в режиме) - НО РАБОТАЕТ...катушки не крутил - самые громкие станции укладываються в крутилку КПЕ и мне норм....
Esto no es inteligencia es genialidad, la inteligencia y la genialidad son cosas distintas, después de la inteligencia viene la genialidad, alguien puede ser muy inteligente, pero la genialidad es la genialidad y no la supera, gracias tesla y demás inventores genios los creadores del pcb del transistor de los resistores capacitores etc etc la genialidad es la impulsora del mundo moderno y la tecnología, se piensa que la inteligencia lo es todo, pero la genialidad es el futuro
setelah semua selesai dirakit seharusnya ada penjelasan secara tehnik tahap 1 yg hrs disetel yg mana dulu sampai tahap akhir tidak bisa hanya secara visual saja utk content 2 kedepannya saya rasa bisa dibuatkan vidio 2 seperti itu jadi lebih sempurna 👍👍👍👍👍
all of the alien' got so upset with the humans' .. for they just .. picked up can's and ran' steel string .. and communicated .. because the outer folk' was acting too smart .. and WE IS ALL BROKE NOW .. Upper Canada KJV* December remember crystal quartz four piece bright' silent Amen🎁Ni hao' Christmas ma'
Won't it be better if all components aren't soldered in? Start with the components required for the amplifier. Check the amplifier and work on the next section like the tuning circuit. This way it will be easier to isolate bad soldered connections or connections missing soldering or short-circuiting. I learned this lesson a long time back when I built my first AM radio from a kit.
Doesn't anybody narrate their videos anymore ??????? Computer voices just do not do anything for us anymore except to misprounce words and confuse content. Narrate it yourself, but elevator music is irritating.
The situation in the UK , is that most broadcasters have turned off their AM medium waveband transmitters .... so you might think your radio no longer works ............. DAVE™🛑
What is the purpose of this video. I was hoping to learn something but I got nothing. Why did he measure current between the various test points? What was the procedure used for alignment?
One day, I'll see a video showing the correct way to align one of these Chinese radio kits. Goodness knows what all that fiddling with the slugs from about 10 minutes onwards was for, other than to misalign transformers that probably were best left alone.
A signal generator is useful but not necessary as all alignment can be done on a "weak but stable" off-air signal.
I've built several of these kits, including this particular model (and they've all worked well). ♥
Every Chinese kit I've built came with pre-aligned IF transformers. They were almost spot-on, and only needed a slight tweak when the set was up and running.
If you've built the kit correctly, it should be receiving at least some signals without further alignment. If it doesn't, then check the wiring, look for solder bridges and dry joints, and check the circuit voltages before you go adjusting anything.
The general rule: adjust coils at the low frequency end, and capacitors at the high. The trimmer capacitors are those little screws on the back of the main tuning capacitor.
When the set is receiving signals, it's necessary to align the front end to obtain optimum sensitivity over the whole range. Tune the radio to a signal near the bottom of the band. Then slide the coil back and fourth on the ferrite rod to obtain best results.
Then you do the same with a signal at the top end of the band: only, this time, the adjuster will be one of the trimmers on the back of the main tuning capacitor. One adjusts sensitivity, and that's the one to adjust. Then repeat the coil adjustment and, when no further improvement is obtained, secure the coil on the ferrite with a little wax or glue.
Final step is to adjust dial calibration. Again, coil at the low end, capacitor at the top. This time, you need to adjust the oscillator coil (the can with the red slug) so that the dial markings are correct for a station of known frequency at the low end. Then repeat the procedure for a station at the top end, only this time, adjust the OTHER trimmer on the main tuning capacitor. Repeat a few times until calibration is correct (as close as it can be on a simple dial like these).
THEN you can try a slight tweak to the IF transformers, though that probably won't make much difference. Happy listening! ☺♥
We made two of these. A six-transistor one and a seven-transistor one. I guided my 10 year old son through it. He learned how to solder. The instructions were in Chinese... I had to learn the Chinese character for the color white - to figure out where to put in the IF cans. Luckily there was a Rosetta stone: a table of resistor color codes.
@@jeromekaidor7254 That's how I did it! But that was before Google translate could do images - now you can just scan the instructions and Google translate should (hopefully!) give a reasonable translation. I've done a couple of the six and seven transistor ones, and one in a similar case that used an MK484 / TA7642 IC rather than a superhet circuit.
清楚的看到电路图是简体中文的，老古董了，上小学的时候就喜欢自己组装收音机，现在是老年人了。买来一大堆电子元器件开始焊接，安装调试好后听到喇叭发出的声音就会觉得满满的成就感。😊😊😊
انا كذالك اجمع الدوائر واتقنها جيدا
Já montei um rádio quando estudei no Instituto Universal Brasileiro Curso de Eletrônica, isto nos anos oitenta, passei muito tempo estudando pra poder ir recebendo as peças para concluir a montagem. Tudo isso por correspondência. Foi legal!
O que é essa peça laranja q aparece em 1:00 ?
@@Carlos___essa peça é a que aumenta e diminue o volume do rádio.
Vendo esse radio me deu nostaugia da epoca q os radios estavam no auge, eu era criança 😅
United States, Ohio to be specific.
I doubt I’ll win the contest but it wouldn’t stop me from learning great tips and tricks as I always do from your channel. You are an inspiration for many. I assure you.
God Bless and keep up the great work.
このAMラジオキット、中華製じゃないか😱 本格的な計測機器を用いて調整し、しっかり受信できていましたね。周波数帯が日本のAMラジオと同一みたいです。
Professionally , it is unacceptable to tune resonant oscillating circuits , regardless of whether they are intermediate frequency or heterodyne with a screwdriver , it must be made of non-magnetic material ! Greetings from Bulgaria !
Perfect
Correct
Please look carefully. The screwdriver is a plastic one. Alternatively, use your glasses.
Well said .
Kindly wear your glasses sir because as what i see he uses a plastic screw driver...
Transformers! (More than meets the eye) KR Inventor is a circuit building robot in disguise!
Eu já tive um rádio desses 😊.
In India also, I personally feel that we dont have AM, MW and SW ransmission.
These are international radio stations. You can receive these stations in all countries
But we do,
Yes You do! 😊 I've been listening sw stations from India in Finland! (i have a hobby of dx-radio listening) 👍 ..but it needs better radio and antenna than this!😅
Todo mundo 🌍🌎 critica y destruye, pero nadie enseña como hacerlo, buen trabajo 😊😊😊😊😊
I have also repaired such radios and I used to love listening to songs, even now I listen to radios from mobile apps.❤
Project ini seolah mengulang kembali kenangan masa lalu..
Sudah berhasil merakitnya pak?
নাইস বিউটিফুল চালিয়ে যান ভাই সুন্দর একটা রেডিও মেলাদিন পরে দেখলাম সুন্দর রেডিও বানালেন আপনি নাইস বিউটিফুল
Esto me recuerda que debo reparar varias radios antiguas de A.M.,saludos.-
Not to brag or anything, but I cAmazing stunt. His daughter has the best manners. David your best performance is you raising a fine human being. All stunts you do are impressive. Following you for a long time now. The Best.hanged the lightbulb in my hallway while standing on a kitchen chair last week.
When I was young, we had one weak AM rock and roll station (5000 Watts and 120 miles distant) that I always listened to and one local AM station that always came in very strong. I really only listened to those two stations. Had I known then, I would have just tuned the radio circuitry for the best sensitivity on the weak station with the IFs tuned to 455KHZ and left it at that. Would have also incorporated a tuned long wire outside antenna to inject more signal into the radio's front end, which is easy to do. Just make sure the outside antenna is lightning protected- I've seen many old radios that used outside antennas exclusively for reception with antenna coils burnt open from the antenna not being protected.
Excellent. You have given me the confidence to get started on my kit. I am hoping the test points on final check will get me close I don't have a signal gen. You have been a big help. Subscribed.
Ceramic IF filters are for weaklings. And here is real superheterodyne hardcore! The dream of every true radio amateur.🤩😍🤗
Я думал радио петь песни будет,
но работа хорошая, радио топ 👍
És um grande artista parabéns pelo seu trabalho
Unfortunately nowadays it is very rare to hear the radio, Unfortunately nowadays it is very rare to hear the radio, Unfortunately nowadays it is very rare to hear the radio, Moreover, AM signals. But this video tutorial is very good and helpful for beginners who are learning
I like the background musical tune. It's very cool.
Good job to you 💯💯💯💯💯💯
Super bro next FM radio board fitting please
Old is gold ❤❤❤ it
Kesukaan saya waktu kecil saya sering membongkar radio dan melihat isinya...
Good job mr
Tahun 91 aku ngerakit ketika ikut les ketrampilan
Makasih buat LPK Kartini
Jln Nurdin raya Grogol
Salam buat pak Surya
Pak Sumarsono
Pak Suheri
I love it works and want to learn ❤❤❤
I love the AM radio, but to make it is only one issue : how can I get the variable capacitor, IF, long coil and small transformers ?
It can be found in scrap or purchased from Ali Express or eBay
😊net pernah radio am persis kayak di video tsb,apa msih ada PCB+komponen2 tsb net pengen merakit lagi,kalo ada net mau beli+free ongkir 😮
Wow that was built quickly.. neat..
Printed cricket best for beginners thanking you very much brother
Nos deberías de haber explicado la teoría de para que sirve cada cosa!!!!! 😮😮😮😮😮😮😮
As other posts have said, you're just twiddling stuff! The proper way to do it:
Set the IFs to 455 kHz (or whatever they are.) If you can't adjust them with a 455 kHz source, leave them alone and hope they are adjusted properly already.
Go the HF end of MW and adjust the trimmer slot on the variable cap that tunes the stations. There are 2 trimmers, use the one that tunes stations and adjust it to bring a station on the correct frequency on the HF end of the dial. Tune to LF end and adjust the red core on a station to bring it to the right place. Back to HF end and repeat HF procedure.
Once calibration is correct adjust sensitivity by peaking signal strength on LF end by sliding coil on ferrite rod, and on HF end by adjusting the other trimmer capacitor on the main tuning cap.
I concur 100% with that. I am from Argentina, and before 1978's football world championship, radios were so expensive that I bought a lot of kits and put them together, to sell. I had experience with valve radios too, and I can tell with perhaps 98% of certainty that the IF coils were always tuned right out of the factory.
@@RI-ns8wzyou are the legends.
I wonder how many IF stage radio have back then.
@@RI-ns8wzyou are the legends.
I wonder how many IF stage radio have back then.
Giải tần âm thanh của đài này chắc công cao vì cóng Am chỉ thế.
Kerja bagus. Saya suka radio analog...
Good from Bangladesh ❤
Ja montei no anos 80 e gostaria de me divertir novamente.
Onde conseguir o kit ?
Cara merakit yang sangat bagus, didukung peralatan yang lengkap,, tahun 1990 saya merakit radio MW SW SUPER HETERODYNE...Merakit mengandalkan solder dan AVO METER ,,, Bongkar pasang bagian trafo Oscilator merk SUMIDA SIA
Bagian PA pakai trafo OT240 ya?
@@YTUser-4967 Seingatku pakai trafo modulasi IT191 & OT240
Я тоже в детстве собирал приемник, вернее мне собирал одноклассник моего брата))
Хорошо не сын маминой подруги 😄
Itne sare upkaran kit ke sath me aate hai kya.
Nostalgic ❤❤
Terima kasih buat lembaga pendidikan kejuruan Kartini.
Di jln Muwardi Grogol jkrtbrt .barokah belajar selama 1 th bisa punya ketrampilan buat bekal sampai saat ini
А что в Франции уже не делают свои приемники? АлиЭкспресс рулит?
It's hard to find AM radio stations in my town.
Lamentablemente , ya no hay emisoras am , por lo menos aqui en chile...años atras , la radio am hacía furor. Hoy en dia, las pocas que quedan , son utilizadas por grupos evangélicos...se extraña aquella época...
O mesmo ocorre no Brasil , as emissoras de AM migraram para FM.
As emissoras que ficaram no AM estão com programação evangélica.
Todo para decir "chile". A nadie le importa tu país.
@@claudiomartinez2264 si yo extraño la AM me resultó muy buena cuando yo escuchaba la mano peluda por allí 😔
Que difícil es poder sintonizar algo hoy en día en la banda AM. Con toda la interferencia de los aparatos electrónicos que hay
Właśnie kupiłem i czeka zestaw na złożenie. Zamierzam zrobić tam modyfikacje, żeby radio było energooszczędne 3mA max na minimum głośności i odbiór krajowej radiostacji na falach długich (LW).
Gratulacje, proszę podzielić się wynikami później
Have a few . Like this type this I do during winter. Then market them in warmer weather. to buy. more for winter😊😊
Devre güzel, bütün eski radyolarda bu devrenin bi benzeri var, fakat bu kadar iyi yakalayamıyorlar.
Why did he blob over adjoining solder pads during the alignment after it was all put together?
Beautiful video
New supporter friend,
покупал такой на алихе голубенький, лет пять назад...собрал, включил - он работает....ничего не крутил, не подбирал токи каскадов (хотя мерил - они с этими номиналами резисторов не в режиме) - НО РАБОТАЕТ...катушки не крутил - самые громкие станции укладываються в крутилку КПЕ и мне норм....
Buen trabajo! Excelente 👌🏻
POSSUI VÁRIOS RADINHOS DESTES LANÇAMENTO DA SHARP NA COPA DE 1970. OS TRANSISTORES NA ÉPOCA ERAM DE GERMÂNIO ENCAPSULAMENTO DE ALUMÍNIO
Esto no es inteligencia es genialidad, la inteligencia y la genialidad son cosas distintas, después de la inteligencia viene la genialidad, alguien puede ser muy inteligente, pero la genialidad es la genialidad y no la supera, gracias tesla y demás inventores genios los creadores del pcb del transistor de los resistores capacitores etc etc la genialidad es la impulsora del mundo moderno y la tecnología, se piensa que la inteligencia lo es todo, pero la genialidad es el futuro
All old is wonderful and beautiful
I use to make transistor during 1978. Famous brand in India named Jerking
Awa bino bolobi nga nakoloba Nini?
Plateforme disposant schéma pour un appareil électronique.
Exente trabajo❤
هذا مجرد تجميع لا غير لا ينم عن اي مهارات.. كنت اضن انك سوف تقوم بصناعة راديو من الصفر وتقوم بشرح ذلك
Love from srilanka
Nice radio! 👍
Halo bos.bagai mana cara membuat relay sederhana dan saya suka...
My father's old Radio 😢❤
Good manufacturing company
setelah semua selesai dirakit seharusnya ada penjelasan secara tehnik tahap 1 yg hrs disetel yg mana dulu sampai tahap akhir tidak bisa hanya secara visual saja utk content 2 kedepannya saya rasa bisa dibuatkan vidio 2 seperti itu jadi lebih sempurna 👍👍👍👍👍
Hello, it works very well, please help me. I want to use the device between 5 and 50 Hz in the FM band, how can I adjust it?
Tunning of IF correctly is the most important part in this circuit
The IF transformers with most of these Chinese kits are aligned at the factory. They are best left alone until the radio is fully working.
Consertei estes tipos de rádios nos anos 70 e 80, como conseguir estes kits para montagem?
Aliexpress ... Kit diy AM radio.
Where is the schematic ?
I not found .
É bom prestar atenção sem barulho de som
nice but i want PCB radio world resiver AM FM And Sw bands along with Tv band
Circuito absoleto não existe mais rádio AM aqui no Brasil!
Да уж. Всегда мечтал сделать радио на средних волнах, чтобы слушать китайцев.
А гдеже твои станцыи типа "Маяк" и всё такое?
@@ВасилийТёркин-г3мпо проводам вещают.
Маяк на ФМ сейчас
I know this project its very easy as long is coming together in the box or plastic bag
Excelente projeto.
all of the alien' got so upset with the humans' .. for they just .. picked up can's and ran' steel string .. and communicated .. because the outer folk' was acting too smart .. and WE IS ALL BROKE NOW ..
Upper Canada
KJV*
December remember crystal quartz four piece bright' silent
Amen🎁Ni hao' Christmas ma'
Молодец продолжай, скоро понимаешь чисто звучащие радио.. Но мой тебе совет подключи к спутнику.
Won't it be better if all components aren't soldered in? Start with the components required for the amplifier. Check the amplifier and work on the next section like the tuning circuit. This way it will be easier to isolate bad soldered connections or connections missing soldering or short-circuiting. I learned this lesson a long time back when I built my first AM radio from a kit.
Pcb available?
Удивительно, что после такой рукожопой сборки и бездумного кручения сердечников контуров, этот приёмник смог поймать что-то, кроме помех.
잡음이 심해서 회로 선택을 바꿔야 좋을 것으로 보입니다
Doesn't anybody narrate their videos anymore ??????? Computer voices just do not do anything for us anymore except to misprounce words and confuse content. Narrate it yourself, but elevator music is irritating.
Bro where can i get this
good work.
Well done 💯
Input and output transformers and IF transformers for frequency alignments in olden days.
Oba eu quero aprender 😊
The situation in the UK , is that most broadcasters have turned off their AM medium waveband transmitters .... so you might think your radio no longer works ............. DAVE™🛑
Gosto desses kits. ótima montagem!
Good very good 👏👏🌹🍀🍀OFlraq🇮🇶
Comment faire le circuit imprimé ?
Lebanon (Currently in U.S.)
Is ki mokamal parts khahan si milen gy pakistan m
bạn ơi hưỡng dẫn làm máy dò kim loại đi
What is the purpose of this video. I was hoping to learn something but I got nothing. Why did he measure current between the various test points? What was the procedure used for alignment?
Good idea 👍💡