[Stephen Taylor]

Hi Craig,

thanks for the message – would be super-grateful if you can find it.

Cheers!

Steve

[Stephen Taylor]

Found this on here, not sure how I missed it before – sounds pretty reasonable:

Take off the top cover, the tuning slider has some pins glued to the tuning string, probably the glue let loose or the pins are broken, or worst case the string is broken, If the string is broken, you will need a new one, If not, tune in to a known station, set the slider exactly to the stations Mhz, with epoxy or a strong glue attach the slider to the string.

 

[Stephen Taylor]

I managed to get the bulb changed without doing any damage – it those fiddly mechanical-type jobs that scare me the most.  The hardest bit for me was screwing the copper leaf spring back in place.

The oscillation problem was due to a faulty diode.  I’d had to replace them all on the right-hand channel but tested them on the left and they all tested “OK” but clearly weren’t.  It was basically a “process of elimination” fix because the diode were the only things that were different.

Thanks again for your help, I’m extremely grateful.

Cheers

Steve

[Stephen Taylor]

Thanks so much for the reply, fantastic detailed advice – there’s no substitute for learning from someone who’s done it before.

I’m building myself up to doing it this weekend – a while ago I bought a Beocenter 3500 kit from Danish Sound Parts which I haven’t used yet, so I’m hoping one of the bulbs in that is a match.

I’ve been carefully testing it and the only remaining problem (apart from the lamp) is that left left channel oscillates at around 1kHz if I activate the unit with speakers connected.  The only difference that I can think of is that I replaced more of the diodes in the right-hand output section than I did the left.  I tested them and put the ones that passed back in – regretting that now.

Thanks again,

Steve

[Stephen Taylor]

Fantastic – that’s worth knowing!

Thank you!

[Stephen Taylor]

Thanks very much for the reply – great details in there.

Although creating a replacement from scratch is really appealing to me, it a hell of a lot of work.  For me the hardest part would be reverse engineering the requirements.  Even so I’m tempted to see how far I can get with something like a BBC microbit and a Heath-Robinson DIL adaptor.

Cheers

Steve

[Stephen Taylor]

Hi Peter,

Thanks for taking the time to reply with such great advice – I’m very grateful.

I’m in no rush with it so I’m going to take your advice and go slowly.  If I learn anything that I think might be of use to others I’ll post it here.

Glad it’s OK to praise Danish Sound Parts – you really do get a personal (and very prompt) service from them.

Cheers!

Steve

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