Just purchased this item, here is what the listing said:
Radio works fine but the cassette is poor at playing tapes as the sound quality is really slow.
EBay
Aiwa HS-TX406
Yet another Cassette player circa 1990. Again possibly another one that needs its drive belt renewing, so in that case I’ll order one in. This one cost the grand total of £9.95GBP.
This link takes you to Radio museum.org where you see the technical detail of this unit : Aiwa HS-TX406
I have today received this item that I recently purchased on EBay, the original blog post can be found here: Blaupunkt Dab CD radio
Blaupunkt CD Radio
Did you know that Blaupunkt translates as Blue point or Blue dot from German to English? This relates to the blue dot that quality control used to paint on their headphones that were being produced. In fact all their products now have that blue dot as part of the logo on all of their range.
I think I mentioned that this might be an easy repair, it’s probably not going to be anything too technical, but it will need a bit of deconstructing to get to where I need to be, due to the way this item is assembled.
The unit is cosmetically sound, radio in both FM and DAB works perfectly, Bluetooth and USB also work perfectly, in fact the whole unit works perfectly apart from two obvious issues.
The CD was reported as an issue however the actual fault wasn’t clear. It appears that when the unit is turned on the cd drawer opens no matter what mode the set is in. You can close the door and it opens again about 10 seconds later. It won’t stay shut and it dosen’t recognise any media.
CD drawer opens constantly
The second and what is an unlisted issue is that the unit has inherited a knocking from inside that I suspect has probably occurred in transit. On opening the unit one of the speakers has broken loose as a securing catch on the speaker grill has broken. I will need to fix this, it’s really nothing major.
Who’s knocking?Broken speaker bracket
To get to the front of the unit you first have to go in through the back. When the back panel is removed you have to unsolder the aerial to be able to get into the box and unscrew the front unit, this then allows you to extricate everything through the front of the unit.
Aerial wire removal
Reading about similar issues on line it appears there could be a number of issues here from loose belts, dry drivetrains, loose cogs, sensors needing cleaning, lasers needing cleaning right through to total replacement of the cd unit. I will wait and see what presents itself when I can spend some time on this in the next couple of days. It really is a nice little unit and it would be good to get it back working fully.
The mains circuit contains a big capacitor that needs bleeding before I get anywhere near it. This is done and work begins.
Speaker post fixOld cd stuck in driveHighly charged capacitor being bled
I’ve fixed the broken speaker securing clip by using some Araldite 2 part adhesive and a small clamp. I’ve left this for a few hours until it set hard. It’s now back in position and doing the job it was designed to do. Both speakers are now secure.
I found out why the Cd drawer kept opening. There was a previously installed and damaged disc sitting under the carriage. As soon as that was removed the Opening/Closing scenario is no more.
I reassembled the unit and it all appeared to go well until….no disc error 🤦♂️
Sort one issue and another arises
Damn, I checked the drives they’re ok, I’ve cleaned the lens and reassembled yet again. Same issue.
Laser diode adjusterLaser diode check
I’ve opened it up yet again and checked the output power of the Laser and that is at .03 ohms. Small adjustments on the diode show no improvement in either direction so it is looking as if the damage is within the laser itself. I don’t hold out much hope of getting the cd working as it’s not really a replaceable unit as it wasn’t designed that way. So unless I can find some way of getting around this issue I might just have to accept that the unit will just be used in Dab, FM, USB and Bluetooth modes.
I’ve just purchased this item from EBay. Here’s the listing:
This is being sold as spares as sounds like the belt has gone so don’t play tape has some battery leaking marks but radio plays fine.
Please study the pictures as this makes up some of the description thanks for looking and please check out our other great bargains 👍
Ebay
Sony Walkman
Just a sucker for a bit of retro me. I’ve worked on the discman, blog post here: Sony Discman D-121 Pt:2 as well as on a few others spread over this site.
This one dates between 1991-93 as these were the years that these particular units were manufactured between. I knocked the price down a bit but ended up paying about £18GBP in total.
It looks to be in good cosmetic condition with light usage as you can still see all the numbers on the rubber pads quite clearly. For a unit that’s potentially into its 33rd year that’s no mean feat. Anyway we will just have to await its arrival and not get too excited.
I preferred the tape Walkmans to be honest and I’m hoping this one will be a simple fix so I can play all those old REM tapes I have sitting in the cabinet at home. But it probably won’t be a simple fix. And it has corrosion , how quaint!
Excellent sound quality on Blaupunkt DAB radio with built in speakers NOTE CD player mechanism is not working
(possibly an easy repair job)
Radio & remote OK.
RRP £99.00
EBay
I ended up paying the grand total £21:22 GBP for this item and that included postage. I may have got quite a good deal, however as usual I will have to await its arrival as you can’t always trust EBay listings. Hopefully the issue with the cd mechanism is a relatively easy fix 🤞
Blaupunkt Dab Cd radio
Looking forward to getting busy on this one, back to the end of the ever growing list of items to work on you go.
I’ve purchased the item below from EBay. Got a bit of a discount and ended up paying £7:18 GBP in total. I need a small radio for listening to the sports commentary at work and thought this would be a simple enough project for me.
Sony ICF-480L 3 Band Receiver FM MW LW Portable Radio FAULTY Sold as SPARES
The unit is FAULTY. It powers on but the sound quality is poor and the volume is NOT loud. There is NO mains adaptor included. Sold as SPARES.
EBay
Cosmetically it looks a little tatty but a good clean up and touch up with a Sharpie pen might see to that, maybe a new potentiometer or just some contact cleaner might sort the sound issue out.
Sony ICF-480L
Anyway I will await delivery and post an update of the condition and repairs I will need to carry out shortly. You can see the assessment and repair of this radio here: Sony ICF-480L 3 band radio assessment and repair
I’ve got a bit of a queue of repairs on cameras still to come as I’m awaiting parts / components for them. So keep an eye out for a flood of updates on previous posts over the coming weeks.
I could go into lengthy detail but I won’t bore you just yet. Below I have quoted the Wikipedia entry that explains things in a nutshell better than I ever could. I will however give a few details of attempts I have made and equipment I use for carrying out this mode of communication. I am currently building a new radio for this mode that I will cover in a later post.
WSPRnet map
WSPR (pronounced “whisper”) is an acronym for Weak Signal Propagation Reporter. It is a protocol, implemented in a computer program, used for weak-signalradiocommunication between amateurradio operators. The protocol was designed, and a program written initially, by Joe Taylor, K1JT. The software code is now open source and is developed by a small team. The program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station’s callsign, Maidenhead grid locator, and transmitter power in dBm. The program can decode signals with a signal-to-noise ratio as low as −28 dB in a 2500 Hz bandwidth. Stations with internet access can automatically upload their reception reports to a central database called WSPRnet, which includes a mapping facility.
Wikipedia
What fascinates me most about this mode of communication is that in recent weeks it has gained a new audience as a result of a television documentary. This documentary was regarding the search for the missing Malaysian airways flight MH370 that vanished from radar screens on the 8th March 2014. An investigator tracking its disappearance has been cross referencing WSPR signals in the area that the aircraft was last reported and he has apparently plotted the route taken by monitoring these signals as they were reflected or distorted by the aircraft’s footprint in this area, well beyond the planned flight path.
Wspr on the 80 Mtr bandWspr into Europe
My setup for testing propagation on a number of different bands is very portable as that’s normally the way I work when taking to the airwaves. I’m always moving around or working from different locations so it’s always good to be able to monitor conditions using a compact setup.
Wspr into Australia
I do also have an aerial system set up in my loft that cannot be seen, it’s kind of clandestine in that way it does not grab the unwanted attention of my neighbours. I specialise in low power communications and again this does not draw the attention of anyone living near by as disturbance and interference rarely occurs. The maximum power level I normally use is 10 watts, but more likely somewhere around the 5w QRP level. My WSPR setup operates between 200mW and 5mW of power. Extremely low power, there is probably more power in that sports watch sitting on your wrist than what I am transmitting.
My Portable setup
I have an inflatable aerial, yep that’s right inflatable! Perfect for mobile operation using QRP low power technology, It covers most of the high band frequencies and I mainly use it on the 20 Mtr band (14mhz) or the 40mtr band (7mhz) though other bands are also available. Fully inflated it stands about 6ft high and can be hung outside, inside or just perched in a corner somewhere.
Inflatable multiple HF band antenna
There is an antenna tuner , this is one I purchased from the States in a kit form and built myself. It’s called an Emtech ZM-2 Atu details can be found HERE
Emtech ZM-2 ATU
The actual transmitter sits in a small package not much bigger than a box of matches. This was purchased already built and is called a WSPRLITE classic. I am in the process of building a new transmitter and receiver combo that is also in a kit form, I don’t anticipate completing it any time soon as I just don’t have the time at the moment.
WSPR Lite transmitter
I have made a number of filters for the different bands (40mtr, 60mtr,80mtr and 160mtr) and these boards connect to the output of the transmitter to aid in obtaining a clean signal and to prevent deviation from the set frequency.
Band filters for WSPR operation
The power comes from a 3000 mAh 5v power bank. However the problem here is that the power draw from the WSPR unit is so small the power bank will some times close down, and for this reason I have had to build a small usb circuit that creates a minimal demand on the power bank keeping the power supply constant. With this power bank and the WSPR unit on its high setting I can easily get 16 hrs of continuous use. When I work on the lowest setting I can achieve 3 full days (72hrs) of use.
3000 mAh power bankThe circuit used to fool the power bank
And that’s about it, all this kit can fit in a small unobtrusive bag or box.
Operation
First and foremost the transmitter connects to a computer where you can access all the parameters of the unit and set it up how you want your operate, power, duration and frequency etc. The unit already has inbuilt filters for the 20mtr (14Mhz) band so you don’t need additional filters if that is your band of operation. Once the programming is done you can now set the system up in place as you want it. I sometimes use this from my loft to see just how well certain bands are working in certain directions at different times of the day.
The battery connects to the transmitter that in turn connects via the filter to the Antenna tuner unit. the antenna unit connects to the antenna.
Timing has to be precise when setting up, you set it to transmit at every 2 minute interval.
Once you are transmitting it’s worth leaving it be for about 30 minutes and then you can pop on to WSPRnet to check your signals. You can check what is being received and what strength of signal is getting through to your destination .
I use an app called WSPR watch that connects via the WSPRnet system so I can monitor my performance from absolutely anywhere just by using my mobile phone or iPad. How convenient is that? I can leave the unit unattended and monitor it remotely.
In summary the WSPR protocol uses a very weak signal to test atmospheric and solar cycle conditions to determine a viable route for a signal to reach a destination. if you were to listen in at the destination all you’d probably hear is white noise, however the decoding program is so accurate it can pick up a signal to noise ratio of as low as -28db.
Im leaving it there as I could ramble on for ages. If anyone for some strange reason wants to know more then please get in touch.
The radio has been received see here: Not just Dead….Fully dead and if I can’t get it going, I have at least brought a very tidy storage box.
What surprised me when first opening up this radio was the immense amount of boards and circuitry inside, I must admit I took a gulp at this and questioned my reasoning for purchasing the item. However it’s all a learning curve and I have to start somewhere, gone are the days of simple circuits on traditional radios (with big components).
Roberts blutune circuitry Roberts blutune power boardRoberts blutune circuitry
I arrived home from work and sat myself down in the conservatory surrounded by test devices for about 4 hrs until I totally overloaded my self with information, creating more questions than answers, i decided to give up for the day and further research the potential faults for this unit via other sources.
To me the power board seems fine, power is going where it should, there appears to be no short circuits or component damage however in places there does seem to be some signs of leakage so I may have some components that need replacing or maybe it’s just remnants of flux and stuff left behind after initial construction.
Blutune board under microscope Blutune board under microscope
None of this can be seen by the naked eye but it becomes apparent after being placed under my new toy an Andonstar microscope viewer. It’s at the entry end of the range but it is already becoming a game changer for me, due to my failing eyesight.
Andonstar AD106S
Copyright Andonstar
Further investigation appears to highlight an inherent issue with this range of radios when they just seem to stop working (probably why Roberts ceased production).
Generally the power board isn’t an issue, it all focuses around the display board where a controller to the screen has failed or the amplifier chip has failed, hooray I say! And then I find out both components are about the size of a grain of rice… Boo I say.
I have no experience at all in components this minuscule in size, but if I can’t get to the root cause and eliminate all other possibilities I will give it a go. In the meantime fault finding will go on between other jobs and this will continue to be a job in progress that will be revisited and updated as time goes by.
The plan short term is that I’m going to borrow a thermal camera and check if there are any hotspots under electrical load. You never know I might just find something.
I shall comeback to this project at a later date.
Thanks for passing by. Stay safe, be superb. You’re a star 🌟
I have just brought this inoperative Roberts Dab Blutune T2 digital radio off of EBay for £8 (GBP). I managed to barter the price down a bit from £12 and I was quite pleased with myself for doing that.
Roberts Blutune T2Roberts Blutune T2
So today I have received the package. A lovely little item cosmetically in good condition with the only external damage being that the speaker cover has a tiny tear in it , and the very tip of the aerial is broken along with the plastic stop that secures it when in the down position….no real issue, all easily dealt with.
The concern is the label on the top of the unit. Fully Dead!
Roberts Blutune T2
So what’s that then? Is there an in between? Some sort of purgatory for audio systems, or is it a way of saying that someone has ensured it will never work again?
Well, I’ll get the back off tomorrow and have a rummage to see what’s in store for me. Maybe my bartering of the price has meant the seller has removed all internal contents so that I now have a nice “Empty box”.
I just love some of these descriptions sellers use, makes me giggle and wonder what was going through their minds when they decided to sell an item that is fully dead.
Maybe there is just different grades of death that I was just not aware of.
So most of my adult life I have convinced myself that despite having a hatful of interests there was nothing that I was particularly any good at. It’s strange really how you always knock yourself back if you don’t have that much confidence. In truth it really is quite the opposite. I started out in Photography way back in the days before digital when you had to get your hands wet to produce results, for me the old Silver halide era of photography cannot be matched or equalled and personally I think anyone can be a photographer these days, however give them developing tanks, print dryers developers and fixers an enlarger and then ask them to dodge and burn prints and then retouch them and the result might be slightly different. I remember days when I used to photograph weddings and shoot maybe 6-8 rolls of film, a friend of mine in the digital arena shoots maybe 2-3000 exposures per outing! Wow, she will never experience the fear of having a blank film post processing.
On top of this I’ve had an interest in electronics from an early age, I used to visit jumble sales as a kid, buy old radios and repair them and sell them on to get some pocket money. I obtained a city and guilds in electronics back in 2000 as well as an “A” class Radio Amateur qualification (M0ESB) so yes I’m a Radio amateur as well. I could have ventured into a job role utilising this however I preferred to maintain it as a hobby as I didn’t want to fall out of love with electronics.
I also enjoy arty stuff, I love painting both pictures and stuff, tarting stuff up – you know what I mean. I have recently had lessons in the Bob Ross method of painting with a local tutor and I really enjoy this. I’ve always enjoyed making models and painting them and I like building small dioramas as well so I can be quite crafty when I put my mind to it.
So to return to the start when I was searching for my worth as such, I have decided to combine a number of these hobby/experiences and I will be purchasing old unloved equipment, making it good “Tarting it up” and hopefully moving it on either for decorative purposes, for use as props or even returning it to its original purpose.
The site is new and I’ve kind of jumped the gun by getting this up and running before I have any projects on the go or even stock to use in those projects. Hey ho, that’s the way I roll is anyone else as ass about face at doing things as I am?
Hopefully I can record my progress through this site that is a new venture for me as of Feb 2023.
Maybe you as a visitor will follow my journey, maybe you will pass on through, however please feel free to feedback any constructive advice as we can all learn from that.
Foxes Den 
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