A strange thing happens, when you accidentally find yourself in possession of a piece of tech that is so well designed and built that it gathers a dedicated following.

Let's talk about the Jabra REVO Wireless headphones, from 2013, and long since discontinued. Reviews would describe them as bass-heavy (derogatory), and expensive for the features, but to me they were damn near perfect.

Why I love these headphones )

Let me introduce you to my second pair. Hinges still intact, but ear cushions disintegrating. Here we return to the dedicated user base of these headphones, which is not limited to just me, because there are still third-parties selling replacement ear cushions on ebay, 12 years later. I've never actually replaced the ear cushions before, but it turned out to be really easy.

Replacing ear cushions )

Before we snap the new cushions in place, there is another problem to look at. On bluetooth there is no audio in the left ear. ifixit says this is a known fault with the slightly newer Jabra MOVE headphones, but seeing as I have it here perhaps it is common across models. So let's take it apart.

Partial disassembly )

After reassembling I am delighted to have the bluetooth on my headphones working fully again, even if I have no idea how it was fixed.

(But isn't the bluetooth version really old? Yes, it is. They don't work with my five year old computer. But they do still work with my phone, and my mp3 player. Which is good, because the newer bluetooth earplugs don't. I need to keep these tightly coupled devices working together for as long as possible.)

I now also have fuzzy ear cushions that won't shed little pieces of black fabric all over my face. A great success.


Photography of headphones made from a dark brown metal, with pale grey plastic and rubber underside of the band, black plastic cups with orange details, and fuzzy black ear cushions.

Jabra REVO headphones with replacement ear cushions
Photo by [personal profile] chebe

I guess this is a disassembly, modification, repair, upgrade type project? Basically, I got a keyboard during lockdown. It's my first 'proper' programmable mechanical keyboard. But the switches I actually wanted were permanently out of stock so I settled for Cherry Blacks. Which are fine? But since getting other keyboards I realised how not enjoyable this is for me to use. That's the thing about owning a soldering iron though, you can change things.

Details )
Step 12; When happy, replace the top case frame, and add keycaps of your choice. Enjoy improved typing experience. And next time you want to try different switches you won't need the soldering iron.

(This isn't perfect. The case is so full that the bottom case seam (under the space bar) bulges open. And I broke some of those clips holding the top case frame on. Removing it isn't something you want to do often. But it really does feel better. More solid to type on, less hollow sounding. It feels noticeably heavier. And the switches are much more to my taste. Actually enjoying using this keyboard again.)


Photograph of fully reassembled keyboard, with top case frame back in place, with Sewing Tin caps in white, shades of blue, and yellow.

Reassembled upgraded keyboard
Photo by [personal profile] chebe

Repairing Cassette Tapes

2024-Jul-18, Thursday 02:15 pm
You've repaired your cassette player. You spend time digging out your old cassettes, only to discover that the tape has snapped and is loose inside the cassette case. What do you do? Learn how to repair them of course!

Details )


View of the lower tape-opening side of a cassette tape, with clear leader tape in the channels.

Lower section of a cassette tape, with clear leader tape threaded
Photo by [personal profile] chebe

The Panasonic RQ-CW03 portable cassette player is a basic (stereo) tape player from the turn of the millennium. It plays tapes, even has an extra-bass switch, but that's it. No recording, no radio. I remember having to go out and buy this, because I had moved on to CDs, but unfortunately my Irish language exam prep hadn't. As a result, this has largely sat in a drawer unused, slowly yellowing, since that exam. And, predictably, when I last pulled it out to listen to some tapes it was no longer functioning.

Details )

A delicate arrangement but workable. Unfortunately, every screwdriver I had was either too big or too small for the trimpot, except, oddly, the one on my Leatherman (Free T2). It fits almost perfectly, like, suspiciously so. A bit like how the Bic biros are (still) exactly the right size and shape to wind the cassettes. But I'm lucky it did fit as it enabled me to adjust the speed, which was wildly out.

Then I partially reassembled the player, and tested with a music tape. The extra-bass still works, but the volume pot is scratchy. I hit it with some electrical contact cleaner spray, worked the wheel back and forth, and let it dry. Cleared that crackling right up.

And this friends is everything I remember tape being. The sound is amazing, and the extra bass mode really delivers. All while conveniently attached to my belt/waistband. I think it's incredibly sad that this quality of player is no longer readily available. Especially considering the low cost of it when brand new. But I'm delighted to have mine working again!


Photo of the player with the back casing off, and the circuit board flipped around, with me using my Leatherman phillips head screwdriver to adjust the speed trimpot.

Speed trimpot adjustment procedure
Photo by [personal profile] chebe

The Bush KCS-317 cassette recorder/player is a recent, budget, device for playing, and recording, audio cassette tapes. I picked it up during lockdown when I wanted to digitise old tapes I'd found, but discovered that my existing players were no longer functional. If I recall correctly I had exactly two options; a portable player, or this one, which I chose for the mains power plug. It has a bunch of other features, like playing from usb sticks, none of which I'd needed. But the sound quality was never good.

I recently fell down the Steve's Electronic Repair Shop rabbit-hole, and the 'Cassette Tape Player. How it works and how to repair.' video in particular emboldened me to sort out that player. So I found a speed calibration test tape which has 15mins of 3,000Hz sine wave (actually 3,010-3,020Hz), and instructions on how to use it. The tape showed the player to be running fast, and as if I needed more encouragement, the buttons, the big chunky physical plastic buttons got stuck in play. It had to be opened up.

(I couldn't find any photos, or manuals, online for this player, so I'm including more than is necessary here in case anyone ever needs them.)

Details )

With the top case removed I could plug in the player, play the speed test tape, and ever so gently adjust the motor speed with immediate feedback. It is a horrible sound, but a very effective test. After I got the frequency to between 3,010-3,020Hz I closed it back up properly, and tested it with a well known tape. The in-built speaker is not good. The in-built microphone is not good. Considering it has a mono tape head, and doesn't have Dolby Noise Reduction, there is a limit to what I can expect from this player. But with the correct speed setting it sounds okay, on headphones at least.


Photo of the player, with the top missing, test tape in situ and playing, with a small screwdriver sticking out of the motor

Adjusting the motor speed
Photo by [personal profile] chebe

I've had a bunch of watches sitting in a drawer for years now. These are the ones that survived; loose occasion wear, and those with leather protecting the metal. (Strangely my skin rots the backs of watches.) They're not expensive watches, just mass-market fashion watches. But having given up the fitbit lifestyle a long time ago, I feel drawn to some wristwatch action.

Details )
A long, long time ago, in a terrifying place known as "the real world" I acquired a fibre-optic LED umbrella. It was wonderful quality and lasted me a long time. Until one day the lights would not turn on, no matter how new the AA batteries I offered it were. Then it sat, half forgotten, in a dark cupboard, for a long time.

The place I bought it from no longer sold them, so earlier this year I decided to fix it. First step; take it apart and have a look see.

Take apart, reassemble )

That's it. Now go play with your own private starfield.



It works!
Photo by [personal profile] chebe

I got a bug a while back. One that demanded I get myself sorted with some vinyl. So I got the parents old turntable (Technics SL-B3) down from the attic. It was dusty, and had suffered some grim build-up around the controls, so my first order of business was to wash it down with some gently soapy water. My dad suggested that maybe it might need a new belt.

Proof of one man's powers of understatement )

So I ordered the new belt from Turntable Basics who told me what length I needed from the model number, and it arrived swiftly complete with instructions.

Next thing I needed was new needles. This was much more difficult, and had me attempting to track down some 20/30 year old manuals online, before realising the replacement part number was written on the turntable itself. I found a nice place on eBay that sold them, and snapped them up.

But, it's an old turntable, and my stereo is a fair bit newer. It's Aux port expects pre-amped input to be able to drive the speakers. Something this turntable doesn't do. So I needed a pre-amp. I found a very pretty one for £100 that I'd have to order from Belfast. But I'm not a patient lass. So I wandered from A/V and electronics shops, getting looked at as if I was insane. Only two sales assistants had even heard of them. One told me to order from Belfast, the other, in Peats, sold me this with a very dismissive and rude attitude.

A phono-phono cable acquisition later and everything was in place. But to be sure I needed a record I knew the air of by heart but didn't mind getting damaged. Cue a 7" copy of Moonlight Sonata I picked up in a charity shop.

All fired up and looking pretty )

But alas! The pre-amp is complete shite. I had to turn the stereo up a lot to even vaguely hear the music, and as I did the background noise and hum got so loud it actually drowned out what little sound was present. To give it another chance I hooked up my mp3-player to it. And yep, the same result. So tomorrow I begin my attempt to return the useless piece of scrap-metal that is far from fit for it's purpose, and order the pretty pre-amp from Belfast. Once again I learn that it's impossible to walk into Peats as a female and actually get anything useful from them. But now I'm only a hairs breadth, or about two weeks, away from getting to listen to my brand new LPs. This is an event I greatly look forward to.

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