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Yi 2 - Best Budget 4K 

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DR02 D - Best Budget Dual Cam

Yi Ultra 2.7K
Mobius (also works as a Dashcam)
Polaroid Cube+
Sena Prism Tube

My favourite USB battery power Pack

This is the excellent USB power pack I use when I travel.

2 x 2.1amp outputs. 8400mAh capacity.

Two digit Led display shows battery level


What SD CARD should I buy?

If you want an SD Card for your camera - these are the ones I use and recommend. 

I'd strongly recommend not to buy any SD cards off ebay - I've heard about too many issues with counterfeit cards - often sold on by unwitting resellers. My inbox regularly gets messages from people who bought a £150 camera then cheaped out and bought a £3 memory card on ebay - Then when it doesn't worth they blame the camera! It doesn't make any sense. Good memory is cheaper than it's ever been - see the links above.

A lot of HD cameras will not work properly with cards larger than 32GB (cards over 32GB are usually SDXC rather than the SDHC standard used by 32GB cards. SDXC cards use the ex-FAT system rather than FAT32 - in short they are a different standard). - so don't just buy the biggest card you can afford - read the specs in the manual to see what it accepts.


RECOMMENDED CARDS (for action cams - see dashcams below)

CLASS 10 UHS-1 CARDS (For HD Cameras)


U3 CARD (For 4K cameras)




The SD card in a dashcam is re-written over, more frequently than in other types of cameras. Some manufacturers void their guarantee if an SD card was used in a dashcam. So, no surprise, there are special High Endurance SD cards made just for's some.


VERY IMPORTANT. These links take you to the product, however Amazon have three different ways of selling. There's Amazon Direct - This means that you are only dealing with Amazon themselves, then there's other sellers that use Amazon's facilities - these show as Fulfilled By Amazon and finally there's Market Place sellers that advertise on Amazon, but operate independently.  I strongly recommend that you only use the first...the Amazon Direct - Sold By Amazon option. Even if it appears that you are paying a couple of £/$ more it is more than likely you are comparing the price of a real item against the price of a fake.

To give you an idea of the extent of the fake goods problem. In a 2016 survey by Apple - 90% of the 'Apple' chargers sold through Amazon - using the other the two methods..which includes the "Fulfilled by Amazon" option -  were found to be counterfeit....90%! 


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Adding some boom to a 1975 Panasonic TNT

This is what I did on Sunday.

Repair videos like this look simple but they are the most difficult videos I make. Trying to take something apart and repair it with a camera in the way isn't easy. I have to make sure things are framed for the camera, and my hands aren't obscuring the view, whilst also trying to perform a delicate task. There is also no way to know whether the repair I set out to attempt is going to be successful. If something goes wrong they are no second chances - the video will just get deleted.

Nevertheless when these types of video work out, I think they are especially entertaining to watch. I made a conscientious effort to edit this video down to within an inch of it's life. I went through the video multiple times in an attempt to shave off any unnecessary seconds of footage. Hopefully as a result you'll find this one moves along quickly.

I'm fully aware that no one watching the video will ever replicate my repair, so I'm just attempting to achieve the same things as the average TV cooking show. If I've done my job properly, you'll find this video easy to watch and you'll have learnt nothing by the end.

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Reader Comments (19)

Di no mite!

July 22, 2014 | Unregistered Commenterjac

Hi Mat, lovely little project - really impressed with your skills on soldering and fixing things in general - do you do this for a living in your day job?

Great little video.


July 23, 2014 | Unregistered CommenterDaz

I always enjoy your videos, as an ex audio technician I can tell you that speakers usually have better bass if the front is isolated from the rear as the cabinet prevents the low frequencies 'short circuiting'. The other new speaker may have sounded a lot better if it was tested in the cabinet rather than 'open air'.
You will normally get more sound out of a 4 ohm speaker than an 8 ohm, this is because power in watts = voltage^2 /ohms, it wouldn't matter in this case, but you need to careful when dealing with high power amplifiers as a mismatch can result in burning smells, smoke & then silence :)

July 23, 2014 | Unregistered CommenterDave

Hi Mat. Once again an excellent video. You are clearly a bit of a tekkie, as well as an excellent film-maker. Your videos are always instructional, and hugely entertaining.

Keep it up.

July 23, 2014 | Unregistered CommenterQuaser

Hmm, I thought low ohms (lower resistance) would make the speaker louder than one that had a higher resistance.
I think it was just quieter because the cone was a third of the area of the original.

July 25, 2014 | Unregistered CommenterEvilution

I'm wrong about ohms. I don't know what I'm talking about half of the time, and this was one of those times.

July 25, 2014 | Registered CommenterTechmoan

Never seen one of those, unreal!
I like your comment at the end!!!!! ;-) B-)

July 25, 2014 | Unregistered CommenterMatte

I would certainly endorse what Dave says. You are not using a baffle and so not isolating the front of the cone from the back. The
sound waves produced at the rear are out of phase with those at the front and with no baffle can easily travel from the front to the rear (& vice versa) and cancel each other out resulting in thin quiet music. Make a baffle by cutting a circle of aluminium the same diameter as the original hole and then cutting an aperture in that to suit your new speaker. I would expect a marked difference..

July 27, 2014 | Unregistered CommenterDerek

Hi Matt speakers don't give out any bass until they are sealed around the edge and enclosed in a resentence chamber , you could make a thick cardboard disc with a cut out for the small speaker it shouldn't sit in mid air.

August 1, 2014 | Unregistered Commenterdrozd

Your comment " [...] you'll have learnt nothing by the end" was completely wrong. I did learn something.

I learned about that Sugru stuff, which gives me some ideas for repairs to some gadgets I've got here. Hurrah for unexpected education!

August 4, 2014 | Unregistered CommenterAlex

Come here for the camera and get entertained by an old 8track....


August 14, 2014 | Unregistered CommenterChris

I'm always happy when I manage to waste someone else's time other than my own - many thanks for visiting (and commenting).

August 14, 2014 | Registered CommenterTechmoan


August 28, 2014 | Unregistered CommenterKumar

Dear all, I can't believe the message from Kumar, I thought Mat was on a holiday cruise somewhere and due back from holiday soon. I am shocked to hear the news. Can anyone verify this is true, as I am a huge fan of Mat and what Mat has achieved with his high level of expertise and professionalism on this site.

If the news is true, then I am very sad to hear this and I wish his family well in this difficult time.

I'll miss you Mat, your humour, your professionalism, and your ever lasting interest in everything tech.


August 28, 2014 | Unregistered CommenterDaz

Mat posted something to twitter half an hour ago so hopefully the stuff from Kumar is (let's be generous) in error -

August 28, 2014 | Unregistered CommenterDavid Plumb

Great work, as usual. You should be on the TV - your vids much better than 75% of the dross they spend heaps of cash on!

September 6, 2014 | Unregistered CommenterJulian

Another great video from you. Thanks for showing us this marvel.
When I first watched the beginning of the video I thought it's a modern device - the colours and look would fit well in today.

I noticed that there seems to be a yellow one in the background of "Two and a Half Man", here's a link to a screenshot.

January 19, 2016 | Unregistered CommenterMatthias

Yes that's one and I can also spot a Weltron 2001 8-track player there too.

January 19, 2016 | Registered CommenterTechmoan

Oh, yes. Now I recognise it. I thought the one in Two and a Half Man is that fancy looking telly from the 70s, but it's the expensive eight track player you showed in your video from last Christmas.

January 20, 2016 | Unregistered CommenterMatthias

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