Aiwa TPR-930

When was the last time you’ve switched on a radio? In your car, maybe. And at home? In the kitchen? In your garage? And when was the last time you’ve listened to music from a tape?
Most (publicly funded) radio stations in Germany suck, as they often only play dumb music (“Formatradio“) – so if you’re into music and live in Germany, you’ll probably prefer golden silence or music from an mp3 source.

Picked this from the trash last week.
Picked this from the trash last week.

If you’re a fan of radios though, have a knack for fixing stuff and don’t mind the space vintage equipment takes up in your tiny city apartment, then you probably can’t let go when you come across a neglected radio full of chicken shit and which has a need for some TLC.

And here’s why:

Japan, Kenya

Back in 1975, my father bought a stereo radio cassette player in Japan. An AIWA TPR-930 which was top-notch back in the days, with an extra switch for CrO2-tapes and one for loudness, a great Line-In, 2 VU-meters, 2 internal mics and 4 speakers. And everything in a densely packed box which also has connectivity for the 12V from a car or a set of batteries. Hence the perfect boombox, it seems.

This radio served us well and it was quickly followed by better radios and tape decks, like the Sony CFS-D7 which my father liked SO much that he bought two! And he used these Sonys to record heaps of tapes with classical music from the Japanese NHK broadcast back in the days. We still have all these tapes. On top of that, we also have a Nakamichi Dragon which – in 1983 and probably also later on – represented the high-end of consumer tape decks. Living in Japan also meant that you had a much better access to high-tech audio equipment. Soooo… radios have always played a part in my life, I guess, and this AIWA TPR-930 was my “first Sony Aiwa”.

In 1996, this Aiwa TPR-930 was given to our good friend Stephen “Githingithia” Kamau wa Gitau, who had it repaired by some jua kali artists and used it in his shack in Kangemi. Notice the DIY-knobs and the missing cassette compartment. 2006 – that’s like 10 years ago! Doooh.

My old TPR-930 in 2006.
Our old TPR-930 in 2006.


Last week, a friend of mine called me and asked for some help, cleaning out a garage full of vintage hardware that her late father had collected over the years. Outside the garage, on a wooden ladder and near the old chicken coop, there was another AIWA TPR-930, but as a German version with DIN-connectors for Line-In/Out/speakers and a German description on the frequency band. So OF COURSE I asked if I could have this radio and refurbish it to restore its old glory. This radio represents part of my childhood, and as a radio ham, radios are more important to me than computers.

Aiwa TPR-930 inside: radio part (left) and power supply (right).
Aiwa TPR-930 inside: radio part (left), tape section, audio amplifier and power supply (right). Notice that it comes with two loopstick antennas.
Aiwa TPR-930: dirt everywhere!
Aiwa TPR-930: dirt everywhere!
Solid quality by design: the tape player.
Solid quality by design: the tape player.

Refurbishing meant a total dissassembly, washing all exterior parts, cleaning the interior, replacing three old belts (which I still need to fix again) and reworking some dry contacts inside. All capacitors still seem to be ok, but should probably also need to be replaced soon. The overall build quality of this radio is very nice. It’s a joy to see this kind of engineering and an honour to refurbish such vintage radios. This radio is as old as I am! And oh boy, isn’t it sexy?

A cleaned Aiwa TPR-930
A cleaned Aiwa TPR-930
DIN connectors for a European market
DIN connectors for a European market
Wrong belt, still needs to be replaced.
Wrong belt, still needs to be replaced.
2 vu-meters
2 vu-meters
My first Aiwa!
My first Aiwa!

I will keep this one next to my Nordmende Globetrotter Amateur. Vintage radios are great!

Old vs. new.
Old vs. new.

Author: jke

Hi, I am an engineer who freelances in water & sanitation-related IT projects at You'll also find me on Twitter @jke and Instagram.

6 thoughts on “Aiwa TPR-930”

  1. This is fantastic! Glad you are finding parts of your childhood and are in a position to do something about getting them back in your life.

    I have similar dreams: I am looking for one of these> which is the first stereo I ever bought … or even better, one of these>

    1. Hey Steve, thanks for the hint! Your comment was indeed stuck in the spam folder. Just recovered it. The Sony stereo system reminds me of my Sony which I bought on Mpaka Road back in the days (and still own).

  2. Hi jke,
    Nice job you did with the TPR-930!!
    I’m currently fighting with a AIWA TPR-930. It’s in perfect conditions, however the old rubber belts in the cassette player are degraded to a kind of a melted paste… (nothing to save unless a sticky black cream…). I was wondering if you have (or know) the measures of those belts and/or where to get them? If yes and you could share the info, would be great!
    One more thing, you talk about 3 belts. In my case I found the rests of 4 belts (3 belts for the working of the cassette player and 1 for the counter).
    Thank you very much in advance,

  3. Hi Jke

    I just found your page and discovered your Aiwa TPR-930 which
    you refurbshed . You did a great job on yours.

    I just bought the same unit from a house sale. Mine is the American model with the RCA plugs.
    The unit was very clean and the radio works well. The problem is the cassette deck.
    All my belts were totally rotted away to black goo. Even the idler wheel or pinch roller
    was turned to goo. I managed to replace all four belts without knowing the specs, but from looking
    at your photos I can’t tell the measurement for the idler wheel. I did replace the idler wheel with
    a new tire but it still doesn’t work properly, The idler wheel tire has to be the correct size for the audio to play at the correct speed.

    Do you have any idea what size the replacement should be?
    Any help would be appreciated


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