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Awesome mate glad you got it sorted. Thanks for the QSO

I’ve been accused of dumbing down the hobby in the past, but for most people new to this I think breaking it down to basics is a good starting point. Glad you got something from it.

@M7EUP I agree dumbing it down can help new comers like myself to understand it better. From my point all I hear is another language that I don't understand and I'm trying to learn that language. Thanks again for a great video. 😊

Thank you for your input. As you’ll see from the other comments it’s a very debatable little project and something that can always be improved upon. I built the filter to the original design but I’m sure that it can be developed further.

I would agree.

So…. Firstly it will Tx only on the bands as stated in the video, which does include Marine band but you must have the appropriate certifications in place to do so. Yes it will transmit on PMR446, however the radio is not type approved, it’s more than 0.5 watts and has a detachable antenna. 👀 It will receive only on air and (obviously). As for scanning. It will only scan on the particular band you have selected, it won’t scan across bands like VHF, UHF and AirBand all at once. Essentially it’s a handheld Ham Radio and not a scanner.

​@M7EUP Thanks, that's really helpful. I've got my marine vhf licence but (as I suspect you've guessed) the radio itself doesn't comply, so I still wouldn't be operating within the terms of the license. Reckon I'd get away with using whatever Antenna it comes with for all the bands I'm interested in?

@@Alpaholic ​​⁠yes and no… the antenna is a multi-band vhf uhf rubber duck and as such will work, but will be compromised due to being stretched to its limits over such a wide band width. Check the TidRadio website as they do band specific antennas too for not a lot of money.

Ask at your local dry-cleaners

Nice one ☝️

Awww cheers mate and thanks for the super positive comment. Some new radios expected early next year to look forward to. Have a look at the TD-H3 hacked group run by Marcus on FB as there’s some great mods on there too.

@M7EUP ...I'm in there already Matt..what..you didn't think I'd be there! Lol 😲😁😁😁😜

@@bigwill4423😂

Thank you sir. Always appreciate a positive comment 👍🏼

Unfortunately if shutting down the house supply made no difference then by definition the “noise” isn’t from your mains supply and this filter won’t work for you.

The 450D was my first radio and absolutely loved it

Thank you so much. If it gets a few people into the hobby I’m more than happy.

I’ve not heard this happening on other radios except when people try and update firmware to non-manufacturer versions. In this case you need to use “medium power” for max output rather than “High Power”

I’ve not used one myself but a quick google tells me that the 33cm version is tuned for 144/430 MHz, your 2m and 70cm band. Just be aware of cheap fakes.

It’s always a bit of a shock but 10m is wide open at this time of year and the long contacts are becoming a regular occurrence.

Thanks

Thanks 🙏

Just make sure you clearly establish that it is Mains RFI by turning off the power and running on battery.

@@M7EUP That advice has been given to me by all my local Elmers as well. But I have not invested in a battery for the shack yet. Home inverter has couple of large batteries. Unfortunately I had not planned that to be near my shack when I built the house! 73

@ it’s a worthwhile investment, even if just for testing purposes. You don’t want to be spending a load of money building a filter if all your noise turns out to be a dodgy transformer in a street lamp outside.

@@M7EUP You are absolutely right. 73

I’d disagree. Price vs performance it’s a solid radio.

Clearly you didn’t watch the video. The Mains filter is for Mains born noise. The clue is in the title and the instruction to “test on battery power with mains power turned off to first establish the source is FROM THE MAINS SUPPLY”

Thanks for the support. I don’t feel in anyway bad towards these people at all. We can all learn a lot from them, but I pitch my channel to those who are brand new to this hobby and may have only just started their journey towards becoming licensed. It’s just a tad tiresome when you explain who the videos are aimed at at the start of each one and they’ve clearly skipped through that part.

Interesting video . Don't use handheld radios at home myself as i have homebase radios ..nothing wrong with 'tinkering" in my opinion though..we all have to learn to keep the hobby alive 🤔 73s M7CYC

Nothing wrong with being a Foundation Licensee, you would be surprised how many times they outshine the Full licencees 😂

​@@mharrison557it's what it's about. It's an experimenter's licence, self learning

To be honest I’ve never had an issue programming in any mod on the TidRadio via the app. If you’re having issues it could be a firmware issue or an issue with model and mode selection in the app. Side by side, on a technical level the TidRadio wins for me personally.

Thanks for taking the time to comment. A a simple dipole antenna is pretty much at the core of all antenna theory and every radio enthusiast should have a go at making one. Don’t read too much into 70cm’s being better on this occasion. At the ranges to watched in the video those differences could have been conditions, other forms of interference, the efficiency of the other persons antenna etc

Yes you can now. At the time of recording you couldn’t but there was a firmware update.

Good luck with the remote setup. As for the DVI to HDMI I do know that it has blown the 5A fuse in quite a number of radios. The issue is usually due to very cheap cables and/or connection to smart TV’s where the HDMI is multi use. If you stick to the parts I listed and are just connecting to the computer usb3 port you should be fine.

Unfortunately the HDMI capture device you recommended failed before I even got to see the display. It got very hot, and although I could see it in device manager at first, it stopped being recognised at all, but still heated up a lot. I am returning it and have ordered one that costs twice as much and has better heat dissipation.

@@themusogeek how strange. Several of us RUclipsrs use that device without issue but thanks for the feedback. Did you have it in its own dedicated usb port and not in a usb hub as I suggested?

@M7EUP yes it was in its own port. It just got hot and stopped working. I tried another device in the port after the issue and the port is fine, and I tried the capture device on another PC and again it didn't recognise it and it got hot.

You need to give me a little more info. Do you mean 900MHz? Are you just wanting to receive or transmit as well. Also why? What’s on 900?

The kenwood and TidRadio speaker mics work very well

What frequencies are you trying to use. What happens when you transmit?

👍🏼

Lol

Thank you

I tend to agree but it’s a nice thing to have.

Thanks for the comments. I’m no antenna theory expert so probably don’t have all the answers. But I’ll give it a go. This isn’t a new design, it’s been tried and tested for many years. Having the elements so close seems odd I agree but it just works. The radiation patterns on each element are wildly different, it’s interesting to plot the design into modelling software like MMANA, you can see how there is minimal interaction from that point of view. Effectively the 70cm element ignores the 2m element, but conversely the 2m element uses the 70cm part, almost like a folded dipole. As for the 90 degree feed point this is necessary (for at least 30cm) to prevent coupling to the shield of the Coax and skewing the radiation pattern and effectively making this an off-centre fed dipole. That’s how I understand it anyway. Ultimately it’s a bit of fun and a tried and tested antenna design by people with a lot more knowledge than me.

The HF rig is a Yaesu FTDX10 and the logging software is Station-Master v2

Ay-up

You’re welcome.

Make sure you use her best kitchen scissors to strip the coax.

I know right! The kids will have to go without Christmas presents this year.

Thanks

Dear Geoffrey, I’m not sure when you last owned, or if you have ever owned a “cheap Chinese” handheld. I believe you’re referring to Spectral Purity and those pesky spurious emissions that people on RUclips like to go on about? Well here’s the thing, these cheap Chinese radio manufacturers watch those videos too and over the last 18 months have all been working hard to get those nasty little emissions down to acceptable levels. I don’t just take their word for it, this “Dumbed Down” license holder does his own testing too! Are they perfect? No they’re not… but they are close enough to recommended limits not to be an issue. Finally, I’m not sure you actually watched the video, but to summarise it for you I made a 1/2 wave dipole, the most simplistic antenna, an antenna with 2.15dBi gain which is less than the advertised ~rubber ducky~ monopole accessory antennas like the 771. I didn’t build a large multi element Yagi and point it at the nearest child or fire station. My channel is aimed at those who are just starting their radio journey and I hope to introduce a little bit of theory to encourage people to learn more. We all started at the bottom with this stuff Geoffrey, let’s try and help them along the way yes?

@@M7EUP I have been licensed for 45 years and have built and purchased many tranceivers, including handhelds from Yaesu, Icom and many Chinese radios. I would be very wary connecting any of these handhelds to an external antenna because they lack band filtering present in competent base station tranceivers.a simple roof top antenna will radiate harmonics of only a few mW for many Kilometers. If you wish to use a roof top antenna then use a reputable base station tranceiver. None of the Chinese handhelds meet regulations on spurious emissions and you are asking for trouble is you connect to a base antenna.

@@geoff37s38Hi Geoff, while I agree some handhelds produced in certain Asian countries lack the necessary suppression of harmonics, saying all do is simply untrue. Likewise there are mobile radios on the market which also lack the required filtering to suppress harmonics to the legal level. Unfortunately, your first comment about not connecting a Chinese handheld to an external antenna because they all produce harmonics, is a bit like saying ‘never drive a French car on the motorway because they all fall apart’. What I would be weary about with any handheld being connected to an external antenna is potentially overloading the front end of the receiver. But this is only going to affect the user, not another radio spectrum users. 73 and have a good day.

@@M0JSX Personally, I would never connect a base antenna to any multi band handheld, even Yaesu etc., or mobile radio that did not have switching band filters. About 30 years ago I had a 2 Metre radio that developed a fault and radiated about a 5mW harmonic that broke into a commercial mountain top repeater 150K away.fortunately, the authorities were understanding and helpful and even fixed the radio for me, but this taught me a lesson.

@@geoff37s38 technology has moved along in the last 30 years. Obviously it is a personal choice that each individual has to make. I have used handhelds from lots of manufacturers plugged into external elevated antennas, without any issues at all. 73!

Thanks Stu

Good luck and let me know how you get on. Just be aware of the losses with longer coax runs.

That the idea

Farnell has them both and RS Components has the big one. I bought them at Farnell in the UK from the Netherlands.

@@Richard110173 0431177081 - Split Core Ferrite, 375 Ohm, 25.15Mm I bought something like this, I hope it's true

It’s station-master v2 I would definitely recommend it. sm2.station-master.online/lander/4?guest-redirect=1

Basically we want those two parts of the element to be about 10mm apart and parallel to each other. Without getting too “Science-y” the 2m and 70cm elements interact with each other so too much deviation from the measurements I give you will alter the results. When we build big antennas with 40m of wire hung in the trees for the HF frequencies a few mm here and there doesn’t matter. But for VHF & UHF with little short antennas a few mm can make a big difference. Just keep the two parts of each element about 10mm apart if you can.

Thanks for your detailed comment. Some good advice there, although I do aim most of my videos at people who have little to no experience in the hobby and try not to over complicate my content. I did actually record the whole testing process with a basic SWR meter and also a Nano VNA but edited it out as I will save this for a later video on antenna resonance. I agree with your comment on wire coat hangers… Rocking Horse Excrement so to speak.

In all honesty a mains filter is not the place to start. If you are causing EMC like that the you really need to get to the bottom of why. It would be helpful to know your set up to help work the problem. Radio, PsU, coax, antenna, antenna location etc etc

@@M7EUP Thanks for getting back to me, I am running a SE HP360 XP broadband antenna on a 9 meter pole, running into a MFJ 986 roller inductor tuner, a president p400 27mhz cb and president hr2510 radio., running rg213 coax everywhere . I intend to try grounding the MFJ tuner this weekend with an independent ground stake, i also yesterday grounded the roofing iron and seen a notiaible difference so will see how grounding the tuner and station goes. If the filters you describe work could be handy for handing out to people I am interfering with, had one such complaint a while ago and replacing his clock radio fixed the problem so i pout it down to poor filtering in the device. havent had any complaints since then.

I think perhaps a mains filter would be an expensive way to go in this instance. Maybe have a box of torroid rings ready and wrap the power leads of affected items through them.

@@M7EUP have tried that on the network cables of the surveillance box already for the cameras, that did not fix the issue, the power cables for the mains being high voltage, i have been advised not to do this to mains cables as it may cause heating from the inductance created. So just asking again, would you mains filter help the situation and would grounding my tuner and my station help also ?

@@thearchitect4726 it’s a tricky question to answer. In your initial question you stated that you were hearing your transmissions through audio equipment which would lead me to suspect that the interference was being captured via a receiver rather than the mains power supply. Similarly if you’re getting issues with broadband etc. The only way of knowing is isolate your property power supply and run your radio and affected equipment on battery power. If the problem is still present it’s more likely to be an issue with the location of your feed line and antenna. You could certainly try grounding all of your equipment although this is not a “cure all” for many issues. As an experiment try transmitting with the radio outside of the property on battery power a with a shorter length of coax that is away from the property.

Thanks for the nice comment mate.

Thanks so much.