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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%! 

« Taxi Cam - Dual Lens Rear-View Mirror Car Recorder | Main | The Full Xiaomi Yi Action Camera Review »

The Tefifon

A few weeks ago I woke up deaf in my right ear. I'm still trying to get that issue resolved, but in the meantime what better thing to do than demonstrate a monaural music player from the 1950s that most people won't have seen before. Full details in the video below.


You may have seen some of my other HiFi based videos, but it's more than likely that you won't have seen them all. I'm particularly happy with the video I made about Compact Cassettes (or tapes as they are more commonly known). If you are interested in seeing more, my HiFi videos are all collected on youtube in This Playlist and the accompanying articles are here.

One interesting fact I picked up whilst making this video: As 78rpm records held under five mins of music per side, longer collections of music consisted of multiple 78s held in pages bound together in a book. This book was known as an album (for obvious reasons). When people moved to the 33rpm vinyl record the album name stuck even though the book was no longer used.

My Tefifon was purchased on ebay - where you'll find German sellers offering vintage Tefi cartridges as well as the occasional player, including portable devices. ebay links UK  US,

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Reader Comments (13)

What an amazing piece of technology. I've never seen anything quite like it.
Odd that it should be mono yet have 3 audio wires. I would have thought they would have been left, right and earth like a pair of headphones.
4 hour cartridge! That's one hell of a long album.

April 7, 2015 | Unregistered CommenterEvilution

How is it sounds compare to 8-Track?

April 7, 2015 | Unregistered CommenterPhakornS

Hi Mat, facinating video of an item I didn't even know existed, fantastic job and as you say, amazing that it's intact and still working perfectly. Why isn't technology today designed to last 60 years plus, I wonder?

Thanks again for listening.

April 7, 2015 | Unregistered CommenterDaz

Hi Mat,
Your reviews always hit the fine line between thoroughness and humour.
My partner's son was deaf in one ear and found he has an allergic reaction to wheat (not an intolerance). After giving up wheat for a couple of weeks his hearing came back!
Hope you get yours fixed. As always, thanks for reading.

April 7, 2015 | Unregistered Commenteral

Thanks for the suggestion. My issue is all to do with a long standing chronic sinus condition. More than likely it's due to an allergic reaction, but as yet no one can figure out how to stop it happening. I'm seeing (another) 'specialist' later this week.

April 7, 2015 | Registered CommenterTechmoan

. I take after my Dad who was, technologically speaking, with it in his day. I'm now an old git of 74 and yet have never heard of this device. Well done Matt I've been a follow ever since your 808 days. Keep on the good work.

April 7, 2015 | Unregistered CommenterDerek

" Why isn't technology today designed to last 60 years plus, I wonder?"

It's plastic - that horrible thing that lasts forever. Doesn't breakdown easily. You know - your McDonald's cup that will last in a landfill for 500 years.

Anyways - your music is all digital now - should last forever - just move it to a newer platform.

April 8, 2015 | Unregistered Commenterzho

I haven't seen this device before, strange one! :)

Btw, have you seen some other sites are picking up your review?

Even TAS!

April 9, 2015 | Unregistered CommenterMatte

Yes I'm having fun watch it spread around the world - wish I'd done the video differently now - could have done without the first 45 seconds of preamble.

April 9, 2015 | Registered CommenterTechmoan

As ever a cracking piece of work; reviews of long lost tech - what a genre! Your public salutes you sir.

April 27, 2015 | Unregistered CommenterGK998

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