It would probably be relatively easy for a fine mesh that looks OK to be added at the manufacturing phase. Maybe they will now do a similar upgrade, without crediting you, of course... Well done, anyway! Gets me that they say they won't bother to fix something that makes the radio unusable on VHF.
Too true Timothy, surely they noticed this problem before I informed them. I've being trying to find 'EMI' shielding on ebay but it's either not suitable or too expensive. But I hope I can find a better solution one day.
Thanks for sharing Nick. My initial thought was all it needs now is to pant the wire black but the wire is so thin you'd probably end up doubling the thickness. 😨
Must be joking Bob, can hardly see it let alone paint it! And Yes it would make it thicker and obscure the display more. I'm not entirely happy with what I've done and will continue to look for a better solution. Thanks for watching
It is a *rare* review where the reviewer diagnoses and corrects a manufacturer's design error. Perhaps TIDRADIO should hire you on as a consultant? The fine wire fix would have driven me mad. What was that, copper coated hair? Nice work, Nick
Thanks Joe for watching, my No1 fan! One day you're getting bored with my videos. I will send a link to this video to my friends in China, but I don't expect they will do anything to fix this problem. I was going to measure a hair to see if it was thinner than the wire. It did drive me nuts, as it beaks so easily. Best wishes Nick
I have a few thoughts, maybe this will help.. 1) The display itself has an ITO or conductive layer as part of the screen and that itself would probably be enough to block the noise, some LCDs also have a metal can on the back - not yours maybe 2) I don't think the LCD is interfering with your signal because it's not using CCFL or EL backlight, LED backlight drivers operate at frequencies far below your HAM frequencies 3) I believe what is actually occurring is your ground plane/cage is creating a better near field antenna, it may not make much of a difference in the far field but try a different antenna. It's very likely either a bad antenna OR/ could be a bad quality low-gain PGA/VGA on the RF front end. Hope this helps.
But it's not an LCD display. Its colour LED which I suspect needs a higher drive level. Typically this will be some sort of square wave, maybe in the 10s of kHz. And as we all know square waves have harmonics up to VHF in this case. Its definitely radiating off the front of the display. I can hold a spectrum analyzer probe near it and see the noise level increase by 20 db on 145 Mhz. If you put a different antenna on the radio that's not near it of course this problem goes away.
@@ptronix Absolutely correct my friend! Radiating from the front obviously! I was originally thinking along the lines of fjs1111 but that would only be correct if it was a fluorescent backlit LCD. Even the Baofeng, QUANSHENG, etc. radios have LCD displays backlit by LED with no interference issues at all. Including full color LCD displays like on my Baofeng 5RM! Much better engineered radios than tidradio obviously. What a fail tidradio and I almost considered buying one of their radios recently! Sure glad I came across your other video first (watched it till the end 😉) before buying such a flawed designed tidradio 🙄 oye 🤦🏻♂️
Use a piece of tinted Mylar plastic, it’s a metallic reflective coating sputtered onto clear plastic film used on car, home, commercial building windows. Anyone who does automotive window tinting ing should have loads of scrap pieces.
I'd thought along the same lines, but what's the conductivity over its surface? Needs to be low resistance for maximum shielding and how would you connect an earth to it?
I'm pretty sure that's called kapton tape and it's pretty nonconductive to say the least. You pretty much need some sort of micro mesh like used in vfd displays maybe 🤔
As we all know Paul a pretty colour display makes everything work better. Or go this case worse! give me an LCD anytime. At least I got a free radio out of it.
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Well done Nick, superb result, hopefully the manufacturer will make note of your fix : )
Thanks dave. I will send a link to the video to my friends in China, but as I said I don't expect they'll do anything to fix the radio.
Also kind of reminds me of a good old VFD display with the preheat wires across the screen 😊
It would probably be relatively easy for a fine mesh that looks OK to be added at the manufacturing phase. Maybe they will now do a similar upgrade, without crediting you, of course... Well done, anyway! Gets me that they say they won't bother to fix something that makes the radio unusable on VHF.
Too true Timothy, surely they noticed this problem before I informed them. I've being trying to find 'EMI' shielding on ebay but it's either not suitable or too expensive. But I hope I can find a better solution one day.
Well said 👍
Absolutely spot on , Well done 🙂
Thanks, not entirely happy with this fix, but its the best I can do at the moment.
Thanks for sharing Nick. My initial thought was all it needs now is to pant the wire black but the wire is so thin you'd probably end up doubling the thickness. 😨
Must be joking Bob, can hardly see it let alone paint it! And Yes it would make it thicker and obscure the display more.
I'm not entirely happy with what I've done and will continue to look for a better solution. Thanks for watching
It is a *rare* review where the reviewer diagnoses and corrects a manufacturer's design error.
Perhaps TIDRADIO should hire you on as a consultant?
The fine wire fix would have driven me mad. What was that, copper coated hair?
Nice work, Nick
Thanks Joe for watching, my No1 fan!
One day you're getting bored with my videos. I will send a link to this video to my friends in China, but I don't expect they will do anything to fix this problem.
I was going to measure a hair to see if it was thinner than the wire. It did drive me nuts, as it beaks so easily. Best wishes Nick
I have a few thoughts, maybe this will help.. 1) The display itself has an ITO or conductive layer as part of the screen and that itself would probably be enough to block the noise, some LCDs also have a metal can on the back - not yours maybe 2) I don't think the LCD is interfering with your signal because it's not using CCFL or EL backlight, LED backlight drivers operate at frequencies far below your HAM frequencies 3) I believe what is actually occurring is your ground plane/cage is creating a better near field antenna, it may not make much of a difference in the far field but try a different antenna. It's very likely either a bad antenna OR/ could be a bad quality low-gain PGA/VGA on the RF front end.
Hope this helps.
But it's not an LCD display. Its colour LED which I suspect needs a higher drive level. Typically this will be some sort of square wave, maybe in the 10s of kHz. And as we all know square waves have harmonics up to VHF in this case. Its definitely radiating off the front of the display. I can hold a spectrum analyzer probe near it and see the noise level increase by 20 db on 145 Mhz. If you put a different antenna on the radio that's not near it of course this problem goes away.
@@ptronix Absolutely correct my friend! Radiating from the front obviously! I was originally thinking along the lines of fjs1111 but that would only be correct if it was a fluorescent backlit LCD. Even the Baofeng, QUANSHENG, etc. radios have LCD displays backlit by LED with no interference issues at all. Including full color LCD displays like on my Baofeng 5RM! Much better engineered radios than tidradio obviously. What a fail tidradio and I almost considered buying one of their radios recently! Sure glad I came across your other video first (watched it till the end 😉) before buying such a flawed designed tidradio 🙄 oye 🤦🏻♂️
Use a piece of tinted Mylar plastic, it’s a metallic reflective coating sputtered onto clear plastic film used on car, home, commercial building windows. Anyone who does automotive window tinting ing should have loads of scrap pieces.
I'd thought along the same lines, but what's the conductivity over its surface? Needs to be low resistance for maximum shielding and how would you connect an earth to it?
I'm pretty sure that's called kapton tape and it's pretty nonconductive to say the least. You pretty much need some sort of micro mesh like used in vfd displays maybe 🤔
Well Nick, they were hoping you would not notice this minor detail. That aside, does one really need UHD4K display on one of those talky widgets?😄
As we all know Paul a pretty colour display makes everything work better. Or go this case worse! give me an LCD anytime. At least I got a free radio out of it.
@@ptronix I agree. Let's be practical and apply some Sense and Sensibility to the unit under test.
Sarcastically minor detail 😅 Devil's in the details as the saying goes. Makes a minor detail a BIG deal!
Brilliant💡👍
Thanks, not the best solution, looking for a better one someday
@@ptronix Pretty sure that's the best and only solution! Just need to find some micro mesh 👍