Good job fixing it! I've bought the same model from Craigslist recently for $15 in "for parts or repair" condition, it also looked pretty ugly with some stickers and dirt on it. After cleanup and fixing it's one of my favorite receivers now. I had to replace one transistor and capacitor, they've been visibly blown up, probably as a result of using a power supply with reversed polarity. Kit of transistors and capacitors from Amazon are very good, they would have a part you need in most cases and they cost pretty cheap.
I had a DX-440 back in the 1990’s. Loved it. I am waiting delivery of a DX-390. I purchased it last week. 😁 It’s cool to see these CAN actually be repaired. 📻🙂
I have a DX-440 bought back in the 1990’s. Love it. I was doing my PhD in a little town, Moscow, ID. About 4 hours from Seattle. We did not have the internet at that time and the only way to get updated news from my country, Brazil, was by radio. I am Still having fun with it. By the way, nice repair. Say hello to Mapple.
NTE457 is a suggested equivalent for the obsolete MPF102. Small tech tip: I have that solder sucker among my collection of de-soldering tools. I have sawn off the 'thumb guide' -- for want of a better term -- so that I can recharge the sucker by pressing it against my other hand, chest or upper arm. Not having to move my thumb off the tool and guide it onto the plunger makes the whole process of de-soldering much faster, especially when there's a lot of it to do.
Thanks for that. I ordered one last week. Maybe I'll order another to be on the safe side! Regarding desoldering suckers, the best one I have ever used is the Japan made 'Engineer SS-02 Solder Sucker'. Great little thing.
I received a 440 as a gift in 89 or 90 and it was a great radio ! A lot to listen to at that time in History also . I wished i could repair my own equipment . i enjoy watching some one who knows what they are doing ! 73 my friend .
I bought my DX-440 in August of 1991. I still have the the page from the RS catalog that advertised it (p.57). The product code was 20-221 and it listed for $199.95, but I wrote down that i purchased it for $139.85.
That was a great job done and now I intend to do the same thing to my sangean ATS 818 receiver, change the transistor or FET whatever is there to get a better sensitivity like you did .Thanks for the great idea.
I have this radio (but marketed as Sangean ATS-803A). Before the internet was really a widespread thing, I used it for receiving weather FAX over short wave. ...And it still works, too. Occasionally it sees some use, mostly so it won't forget how to breathe. :-)
Great fix! I see you have kitty quality control too........ I've used the "NTE" cross reference for their line of replacement transistors with favorable results.
Thanks for another great how to video. I have the DX400 as well as the Sangean ATS803A, which I think is the same radio. Looking forward to making the repairs on both. Thanks to James Bowie for the equivalent part.
@@scriptguru8 I stand corrected, I have the DX-440, which needs the MPF102 FET replacement. Part just arrived, so now I need to find time for the repair. Thanks again for the videos.
Used a NTE 457 on my dx 390 for the same fix and it worked great. Pins are in the same order and outline of FET on the board is the same. I used a solder wick with good results.
I have two of the Sangean version of that radio that I bought new many years ago. Both are in mint condition but one stopped receiving FM a long time ago. I put a loop antenna up a few months ago and haven't gotten the chance to try that connected to either of these radios but when I do I'll be sure to disconnect when I'm done. I keep one next to the bed and often listen if I wake up in the middle of the night especially if there's some breaking story going on. I've always wished the light could be left on or stayed on for a time. That would make tuning around the bands a lot easier in the dark.
Nice Radio. I have the Universum branded model that doesn't have the bandwith switch. The substitute book from the former german company "Jaeger Elektronik" lists BF244, BF245, BFS72, 2N3823, 2N5245 and "++" which means, that there are many more suiteable substitutes. So I think using a different type instead of the MPF102 might not be very critical. Greetings from germany :)
Thank you sir 🌸 Can you help me with Realistic dx440 radio like this device there is a problem sometimes it does not work when I press the play button and lasts for a long time does not work only a digital clock and sometimes it works well by just pressing the play button .. What is the cause of the malfunction note that I am repaired Electronics and I did not understand the reason
Thank you so much for sharing your knowledge. I didn't know low reception was caused by this transistor. Can you guide me in finding a replacement telescoping antenna for the dx440.
I picked up the DX440 at a recycling bin with weak receive. After changing the FET that improved it quite a bit but its still not as sensitive as my DX392 and the SW bands are still dead. Does it have a separate tuner for SW? Thanks.
The MPF 102 is the most common, generic, garden-variety FET there is. You can find them, as well as just about any component, on Ebay. By the way, they're NOT particularly static sensitive. Only MOS semiconductors require special handling..
Thanks for the tech tip, it cured my ATS 803. My question is whether you have employed any preventive mods, such as a pair of back to back diodes? Absent that, would a simple wire clip from the negative battery terminal serve as a safe discharge point from my hand before touching the antenna?
@@SevenFortyOne If you connect an earth ground to the radio ground, that will improve reception, especially on the lower frequencies. But it will increase the possibility of static damage. Without such a ground, the radio is connected to earth ground through stray capacitance, which presents a high Z to low frequencies, and is essentially infinite, for DC. With an actual ground, the path for the static discharge is low Z, so, ZAP!
@@SevenFortyOne Be sure to add the diodes. And if you add an RF choke in parallel with them, that's even better. Choose an inductor with a reactance of a few thousand ohms, at the lowest freq. you'll be using.
Wish you lived closer. I am having problem with my DX-390 SW Radio. AM & SW do not work. Looks like it is an easy fix but I don't have the equipment and know how to repair my radio. I live not too far from Akron Ohio by 30 minutes.
I have a dx 440 that brings in a very weak local am radio station that's very difficult to hear but i have a Sangean ats 803a that's basically the same radio but it does not have the same sensitivity on am, so would changing this resistor do the trick or is there something i can adjust on inside the radio to get it as sensitive as my dx440? Thanks maybe radio shack did something to the Sangean ats803a to make it better when they sold is as there dx440.
Hello, Very nice to see DX440 repair, My DX440 was lying idle for sometime, all bands were working, when I switched on today, it's MW was gone completely, SW/ FM is fine. I checked schematic. Can it because of Q110? Please help! 😢
Hi Rob, I know I have beat this question to death with you but if you had a choice that wasn't hampered by price concerns what new radio like this would you buy that had SSB. I would like to be able to bring an all band radio with me at times. Thanks for your patience. I think I asked this question when you had a live feed with Tom.
The new pl-990 looks pretty good. But even if I had money to burn I think I'd go with the tecsun pl-660. If you haven't seen Giles's videos, check out his channel - the official swl channel. He's got lots of reviews on various radios
My DX-440 works very well on FM mode. On AM (MW and LW) does not work. On SW (AM and SSB modes ) it works but with low sensitivity. Also, there is a 2kHz offset on SW. I mean, to tune a station that transmits at 11.940, I have to tune the receiver at 11.938kHz. Any suggestion ?
In the video I explain the sensitivity problem I had with mine. More than likely you have a bad transistor but its hard to tell without having the radio in my hands
@@SevenFortyOne tanks for the feedback. Unfortunately, I’m in Brazil. So, it is a bit difficult to send it to you. I’ll try do it by myself. I’ve just found the manual service. Thanks again. 👍 de PU2CLR.
I have this radio. However i think i over loaded some thing . Every thing works except short wave freqs are not there i Made a home brew three wire longwire antenna. I could pick up everything. Now sensitivity seem gone except for fm. Any ideas ? Long wire was 50 foot .
Hello my friend .. Can you help me, I have a dx440 device. Sometimes it does not work when pressing the power button only an hour on the screen .. it lasts for days and sometimes it works by just pressing the power button. What is the reason, knowing that I have the ability to maintain it with the help of you
I bought one of these from a Radio junk sale recently,mine is called the Saisho SW 5000 of which is acturly the DX-440,except mine was made in Taiwan,hence the name Saisho.Supriseingly it acturly works very well compared to my other portable radios arround the same age.But I have one very bad problem with it.The front panel that houses the push buttons is badly corroded.It looks like an Aluminum metal plate.You would think they would have used plastic,but no its metal.I have tried lightly sanding it but it is badly pitted,and looks real bad.So how would I repair or replace this panel? Im thinking maybe have a vinyl plastic transfer made and numbers/names printed on then sticking it on top. Any advice would be very wellcomed thanks.
Interesting...I've never heard of the Saishow version before. Anyway, I don't know if this would work or not but I saw a local motorcycle restoration guy rubbing household aluminum foil on a nickel plated motorcycle frame to restore the finish - this might work for your faceplate. I'd be sure to test it first to see what happens.
@@SevenFortyOne Thanks for your quick reply.I live down here in NewZealand,very hard to get SW radios and parts over here.But yes the radio was made in Taiwan and called a Saisho SW -5000.Unfortionitly I can not put a photo of it on here to show you.The corrosion has gone right into the front metal plate,and its badly pitted,I dont think rubbing it with foil would help because it is coated in a black colour,so it is not nickel.As with your DX 440 you will see that front black panel,of which should look perfectly smooth.I may see if I can get a vinyl plastic 3D printed transfer to stick over it.I acturly owned one of these,called the Sangean ATS 803A when they were new,but later decided to trade it in on the Sony 2001D.I whish I had not because the Sangean performed far better than the Sony did.Thanks.
Well I found a transistor here in Costa Mesa at MarVac Electronics. It was not the Radio Shack MFP 102 but they cross referenced it to a NTE Electronics Inc NET 451. It looked just like the one in the Q 115 spot and fit right in. I did it just as you did and was very careful with everything and did it just as you did except I forgot to clip off the tails on the transistor. i put it back together with no problems, I installed the batteries and the clock came on for about 3 sec and then it went off and the radio never came on at all. i took it apart and clipped the tails, which were now bent over, This did not work. to bad, I bought the radio new and only used it a couple of times and has been packed away for 30 years. Very nice looking but no juice. Do you think I shorted it out ? maybe try a new transistor? they still have 2 in stock? or do you have a SW radios you might recommend. Disappointed in SO CAL
Yup - you very likely shorted something out in another circuit on the board below and damaged more components. I doubt replacing the transistor will help - something else is probably wrong now but I wouldn't know for certain without checking it out in person. If you are looking for something new, check out the radios from Tecsun - they are usually pretty good.
Check that the internal battery contacts are actually contacting their mating pads. There are 3 prongs inside that press against 3 solder pads. Not great design, so check it.
Have you ever had the tuning knob on the side get glitchy? As I turn it, it skips forward fast or jumps randomly. I have tried to get in there and cleaned the contacts but after a while it goes wacky again. Some days I am listening to it and the vibration from the speaker triggers tuning and it starts cruising the band randomly by itself. Either it is bad or ghosts are haunting me. Anyone out there have the same problem.
I have one 803a. Given to me by a friend in horrible condition. Over the years, I fixed some of the problems. such as display. VU meter still not working. AM/SW may or may not start etc etc. Does any one has the circuit diagram?. I need help please.
I do not have a wife that is why I have collect over 22 SW radios. I am l 76 years old my first SW radio was and old even that time a EM Sargent. I think it and and 80 rectifier tube and couple of 76 tubes in it,
@@SevenFortyOne I love in Melbourne, bought a cheap shortwave from a $2 shop, not much english channels. Could it have a low sensitivity or has everything changed in this day and era?
![Delco High Performance Radio Receiver! [Repair]](http://i.ytimg.com/vi/ZS3X2Bat8Dw/mqdefault.jpg)
Another classic saved! It’s always nice to see a radio play like it should. Nice repair job! 👏🏻👍❤️📻
Thank you very much for sharing the fix. I just tried it on my DX-440 by replacing the same transistor and now works perfectly!
Awesome! Glad you got yours working
Good job fixing it!
I've bought the same model from Craigslist recently for $15 in "for parts or repair" condition, it also looked pretty ugly with some stickers and dirt on it. After cleanup and fixing it's one of my favorite receivers now. I had to replace one transistor and capacitor, they've been visibly blown up, probably as a result of using a power supply with reversed polarity. Kit of transistors and capacitors from Amazon are very good, they would have a part you need in most cases and they cost pretty cheap.
I had a DX-440 back in the 1990’s. Loved it.
I am waiting delivery of a DX-390. I purchased it last week. 😁
It’s cool to see these CAN actually be repaired.
📻🙂
I have a DX-440 bought back in the 1990’s. Love it. I was doing my PhD in a little town, Moscow, ID. About 4 hours from Seattle. We did not have the internet at that time and the only way to get updated news from my country, Brazil, was by radio. I am Still having fun with it. By the way, nice repair. Say hello to Mapple.
NTE457 is a suggested equivalent for the obsolete MPF102.
Small tech tip: I have that solder sucker among my collection of de-soldering tools. I have sawn off the 'thumb guide' -- for want of a better term -- so that I can recharge the sucker by pressing it against my other hand, chest or upper arm. Not having to move my thumb off the tool and guide it onto the plunger makes the whole process of de-soldering much faster, especially when there's a lot of it to do.
That's a great tip...thanks for the info!!!
Thanks for that. I ordered one last week. Maybe I'll order another to be on the safe side! Regarding desoldering suckers, the best one I have ever used is the Japan made 'Engineer SS-02 Solder Sucker'. Great little thing.
Thanks!
Great job and approval from the Inspector
I received a 440 as a gift in 89 or 90 and it was a great radio ! A lot to listen to at that time in History also . I wished i could repair my own equipment . i enjoy watching some one who knows what they are doing ! 73 my friend .
That is great for sure. To bad radio shack is no longer. Looks like a fun radio. Thanks for taking us through the video.
You make someone day posting this video!! Replaced the part indicated in the video and it's ALIVE!! Thanks :)
Glad you got yours going again!
I use the DX440 everyday. Bought it new in 1989. Thanks for the tech tip.
It's a great radio, this one was my dad's
I bought my DX-440 in August of 1991. I still have the the page from the RS catalog that advertised it (p.57). The product code was 20-221 and it listed for $199.95, but I wrote down that i purchased it for $139.85.
That was a great job done and now I intend to do the same thing to my sangean ATS 818 receiver, change the transistor or FET whatever is there to get a better sensitivity like you did .Thanks for the great idea.
I have this radio (but marketed as Sangean ATS-803A). Before the internet was really a widespread thing, I used it for receiving weather FAX over short wave.
...And it still works, too. Occasionally it sees some use, mostly so it won't forget how to breathe. :-)
Great fix! I see you have kitty quality control too........ I've used the "NTE" cross reference for their line of replacement transistors with favorable results.
This fix works well, Thank you for posting this repair. VE4-SCE Canada
Thanks for another great how to video. I have the DX400 as well as the Sangean ATS803A, which I think is the same radio. Looking forward to making the repairs on both. Thanks to James Bowie for the equivalent part.
Sangean ATS-803A and Realistic DX-440 is the same radio. Realistic DX-400 is different radio, based on Uniden CR-2021
@@scriptguru8 I stand corrected, I have the DX-440, which needs the MPF102 FET replacement. Part just arrived, so now I need to find time for the repair. Thanks again for the videos.
Used a NTE 457 on my dx 390 for the same fix and it worked great. Pins are in the same order and outline of FET on the board is the same. I used a solder wick with good results.
Can you advise which transistor you replaced for the AM weakness? There are several transistors on the board. For the 390 that is. Thanks!
OMG. I just took the link to your wife's art website. Awesomeness.
She's very talented
@@SevenFortyOne Extremely.
Thanks for your time
Very helpful, thanks. I have the DX390 showing the same poor AM reception. I’ll change the FET in mine.
I have two of the Sangean version of that radio that I bought new many years ago. Both are in mint condition but one stopped receiving FM a long time ago. I put a loop antenna up a few months ago and haven't gotten the chance to try that connected to either of these radios but when I do I'll be sure to disconnect when I'm done. I keep one next to the bed and often listen if I wake up in the middle of the night especially if there's some breaking story going on. I've always wished the light could be left on or stayed on for a time. That would make tuning around the bands a lot easier in the dark.
Nice Radio. I have the Universum branded model that doesn't have the bandwith switch.
The substitute book from the former german company "Jaeger Elektronik" lists BF244, BF245, BFS72, 2N3823, 2N5245 and "++" which means, that there are many more suiteable substitutes. So I think using a different type instead of the MPF102 might not be very critical.
Greetings from germany :)
A quality repair kitty cat approved. I have one of these and I bet it needs the same repair.
Thank you sir 🌸 Can you help me with Realistic dx440 radio like this device there is a problem sometimes it does not work when I press the play button and lasts for a long time does not work only a digital clock and sometimes it works well by just pressing the play button .. What is the cause of the malfunction note that I am repaired Electronics and I did not understand the reason
Awesome job. I have a dozen radios to sent you to repair. LOL
Let's talk about that sometime...might make for a good video series
A good sub for the MPF102 is the NTE451 n-channel j-fet.
Thank you so much for sharing your knowledge. I didn't know low reception was caused by this transistor.
Can you guide me in finding a replacement telescoping antenna for the dx440.
I have this as well. Do I put my bfo switch to in or out to hear ham radio? Thanks.
Nice fix once again! Seems to be working pretty good...
Thanks 741. Good job
Thanks!
I picked up the DX440 at a recycling bin with weak receive. After changing the FET that improved it quite a bit but its still not as sensitive as my DX392 and the SW bands are still dead. Does it have a separate tuner for SW? Thanks.
The MPF 102 is the most common, generic, garden-variety FET there is. You can find them, as well as just about any component, on Ebay. By the way, they're NOT particularly static sensitive. Only MOS semiconductors require special handling..
Thanks for the tech tip, it cured my ATS 803. My question is whether you have employed any preventive mods, such as a pair of back to back diodes? Absent that, would a simple wire clip from the negative battery terminal serve as a safe discharge point from my hand before touching the antenna?
I didn't add any protection diodes but should have. I'm not sure of a ground will help here or not but it probably wouldn't hurt
@@SevenFortyOne If you connect an earth ground to the radio ground, that will improve reception, especially on the lower frequencies. But it will increase the possibility of static damage. Without such a ground, the radio is connected to earth ground through stray capacitance, which presents a high Z to low frequencies, and is essentially infinite, for DC. With an actual ground, the path for the static discharge is low Z, so, ZAP!
@@SevenFortyOne Be sure to add the diodes. And if you add an RF choke in parallel with them, that's even better. Choose an inductor with a reactance of a few thousand ohms, at the lowest freq. you'll be using.
Wish you lived closer. I am having problem with my DX-390 SW Radio. AM & SW do not work. Looks like it is an easy fix but I don't have the equipment and know how to repair my radio. I live not too far from Akron Ohio by 30 minutes.
I love that 🐱 man great video
How much does a Q115 transistor cost.
My DX-440 seems to have the same problem as your TH-cam low sensitivity repair video.
You'll have to Google it, I don't know what the transistor costs
DX 440 has the MPF102 transistor FET
DX 390 has the SK152 transistor FET
Nice repair.
Thanks!
I have a dx 440 that brings in a very weak local am radio station that's very difficult to hear but i have a Sangean ats 803a that's basically the same radio but it does not have the same sensitivity on am, so would changing this resistor do the trick or is there something i can adjust on inside the radio to get it as sensitive as my dx440? Thanks maybe radio shack did something to the Sangean ats803a to make it better when they sold is as there dx440.
I'm not sure if the 803 uses the same circuits or not-ive never owned one. You'd have to take it apart and compare it to your 440
My DX440 is off frequncy by about 2 kHz do you know what IF can is to be adjusted to get this thing back on frequency? Thanks.
Sorry, I don't. You'll have to check the schematic
@@SevenFortyOne ok thanks
Hello, Very nice to see DX440 repair, My DX440 was lying idle for sometime, all bands were working, when I switched on today, it's MW was gone completely, SW/ FM is fine. I checked schematic. Can it because of Q110?
Please help! 😢
I'm not sure offhand. Q110 controls MW and SW but not FM so I'm not sure what might be causing your problem
Hi Rob,
I know I have beat this question to death with you but if you had a choice that wasn't hampered by price concerns what new radio like this would you buy that had SSB. I would like to be able to bring an all band radio with me at times. Thanks for your patience. I think I asked this question when you had a live feed with Tom.
The new pl-990 looks pretty good. But even if I had money to burn I think I'd go with the tecsun pl-660. If you haven't seen Giles's videos, check out his channel - the official swl channel. He's got lots of reviews on various radios
@@SevenFortyOne Thanks I was looking as the PL660. I did not think the price was that bad.
Do you do any repairs? I have an old dx-394 was working great and now the lcd display only illuminates when plugged in. Thanks
Sorry, I only work on my own stuff for fun.
I had one if the 450s. Ut was ruined by battery leakage. I was sick because it is an excellent receiver for a portable....
Bummer!!!
hi what kind of transistor did you use thanks
I think I showed it in the video
My old radio. The thing tuned itself. It's in a landfill somewhere.
My DX-440 works very well on FM mode. On AM (MW and LW) does not work. On SW (AM and SSB modes ) it works but with low sensitivity. Also, there is a 2kHz offset on SW. I mean, to tune a station that transmits at 11.940, I have to tune the receiver at 11.938kHz. Any suggestion ?
In the video I explain the sensitivity problem I had with mine. More than likely you have a bad transistor but its hard to tell without having the radio in my hands
@@SevenFortyOne tanks for the feedback. Unfortunately, I’m in Brazil. So, it is a bit difficult to send it to you. I’ll try do it by myself. I’ve just found the manual service. Thanks again. 👍 de PU2CLR.
That's ok, I don't work on other people's radios anyway. It's a pretty easy fix if you are used to working with electronics and soldering
I have this radio. However i think i over loaded some thing . Every thing works except short wave freqs are not there i
Made a home brew three wire longwire antenna. I could pick up everything. Now sensitivity seem gone except for fm. Any ideas ? Long wire was 50 foot .
It sounds like the same problem I talk about in the video
Is this common fault on the RF stages,
happens to the Siemens RK-641 and RK-651? (Same OEM set).
I don't know about those parts specifically but FETs like this one are prone to damage from static
@@SevenFortyOne Thanks.
Best radio me and my friend use to split the frequency 😮
This is not a transmitter...
Hello my friend .. Can you help me, I have a dx440 device. Sometimes it does not work when pressing the power button only an hour on the screen .. it lasts for days and sometimes it works by just pressing the power button. What is the reason, knowing that I have the ability to maintain it with the help of you
Nice job! Thanks! + a cat owns you... :) New sub indeed!
I bought one of these from a Radio junk sale recently,mine is called the Saisho SW 5000 of which is acturly the DX-440,except mine was made in Taiwan,hence the name Saisho.Supriseingly it acturly works very well compared to my other portable radios arround the same age.But I have one very bad problem with it.The front panel that houses the push buttons is badly corroded.It looks like an Aluminum metal plate.You would think they would have used plastic,but no its metal.I have tried lightly sanding it but it is badly pitted,and looks real bad.So how would I repair or replace this panel? Im thinking maybe have a vinyl plastic transfer made and numbers/names printed on then sticking it on top. Any advice would be very wellcomed thanks.
Interesting...I've never heard of the Saishow version before. Anyway, I don't know if this would work or not but I saw a local motorcycle restoration guy rubbing household aluminum foil on a nickel plated motorcycle frame to restore the finish - this might work for your faceplate. I'd be sure to test it first to see what happens.
@@SevenFortyOne Thanks for your quick reply.I live down here in NewZealand,very hard to get SW radios and parts over here.But yes the radio was made in Taiwan and called a Saisho SW -5000.Unfortionitly I can not put a photo of it on here to show you.The corrosion has gone right into the front metal plate,and its badly pitted,I dont think rubbing it with foil would help because it is coated in a black colour,so it is not nickel.As with your DX 440 you will see that front black panel,of which should look perfectly smooth.I may see if I can get a vinyl plastic 3D printed transfer to stick over it.I acturly owned one of these,called the Sangean ATS 803A when they were new,but later decided to trade it in on the Sony 2001D.I whish I had not because the Sangean performed far better than the Sony did.Thanks.
_Well done, the radio is great. You have a good cat. What's her name?_
Cats rule!
Well I found a transistor here in Costa Mesa at MarVac Electronics. It was not the Radio Shack MFP 102 but they cross referenced it to a NTE Electronics Inc NET 451. It looked just like the one in the Q 115 spot and fit right in. I did it just as you did and was very careful with everything and did it just as you did except I forgot to clip off the tails on the transistor. i put it back together with no problems, I installed the batteries and the clock came on for about 3 sec and then it went off and the radio never came on at all. i took it apart and clipped the tails, which were now bent over, This did not work.
to bad, I bought the radio new and only used it a couple of times and has been packed away for 30 years. Very nice looking but no juice. Do you think I shorted it out ? maybe try a new transistor? they still have 2 in stock?
or do you have a
SW radios you might recommend.
Disappointed in SO CAL
Yup - you very likely shorted something out in another circuit on the board below and damaged more components. I doubt replacing the transistor will help - something else is probably wrong now but I wouldn't know for certain without checking it out in person. If you are looking for something new, check out the radios from Tecsun - they are usually pretty good.
Check that the internal battery contacts are actually contacting their mating pads. There are 3 prongs inside that press against 3 solder pads. Not great design, so check it.
Have the same problem in Florida. Hands no longer able to do fine soldering. Anybody know a repair shop? Willing to mail the radio.
Have you ever had the tuning knob on the side get glitchy? As I turn it, it skips forward fast or jumps randomly. I have tried to get in there and cleaned the contacts but after a while it goes wacky again. Some days I am listening to it and the vibration from the speaker triggers tuning and it starts cruising the band randomly by itself. Either it is bad or ghosts are haunting me. Anyone out there have the same problem.
The problem might be 4hat the arrow buttons on the keypad are sticking or some crud got under them. Either that or the rotary encoder is shot
@@SevenFortyOne That rotary encoder was the weakest link. It always seemed a little wobbly. Buttons seem fine. Thanx
I have this radio and it is pretty deaf on sw,fm and audio is great
You might have the same problem I did
Saludos. Tengo problemas con una radio igual enciende pero no se escucha nada
Chequea ese mismo transistor del video. Reemplaza los capacitores electroliticos y prueba
I have one 803a. Given to me by a friend in horrible condition. Over the years, I fixed some of the problems. such as display. VU meter still not working. AM/SW may or may not start etc etc. Does any one has the circuit diagram?. I need help please.
If you do a google search you should find it. You may have to look for the DX-440
@@SevenFortyOne thank you sir
BF245A-B-C DSG order is reversed, so fit backwards.
Phone plug 🔌 jack antenna 😅
I have a dx 440 and it seem to old its own with my Tecsun S8800 and my many other receivers.
I do not have a wife that is why I have collect over 22 SW radios. I am l 76 years old my first SW radio was and old even that time a EM Sargent. I think it and and 80 rectifier tube and couple of 76 tubes in it,
After a loooong Brexit delay I just got 5 MPF102 from Amazon, seller
NIKKO ELECTRONICS 358 KINGSTON ROAD
EPSOM
SURREY
KT19 0DT
GB
kalo radionya berfungsi,saya mau beli bang...
What?
Who said humans had to listen to a shortwave?
Nobody
@@SevenFortyOne I love in Melbourne, bought a cheap shortwave from a $2 shop, not much english channels. Could it have a low sensitivity or has everything changed in this day and era?