A Philips 470A het Zonnetje that is affected by thunderstorms.
The radio seems to play well but has a few strange faults. First of all, it changes channels spontaneously and a long way off. Secondly, the sound crackles, it sounds like thunder. Third, sometimes the radio does nothing at all.
The chassis is completely original. It really has never been tinkered with. And yet so many problems. Or could something have happened to it? We'll watch together.
The Frequency changes are tap sensitive. Tapping the oscillator coil bus gives the most affect. The oscillator coil bus is located at the bottom next to the large tar capacitor.
This is the oscillator coil in question.
This is during the installation of the oscillator coil bus. You will understand that the tar capacitor next to the coil bus was immediately replaced. And so do the rest of the tar capacitors.
And after this renovation it is always nice to know whether the radio still works. And at first the radio didn't work anymore. The voltages around the oscillator were incorrect. But suddenly the radio played again.
And here is the cause of running off the channel. You can see that the lip that runs through the thread is bent, causing the top of the trimmer to become loose. Resulting in running off the channel.
Someone had been there for me after all. He thought he was going to adjust the oscillator. You understand that the oscillator had to be adjusted again. Here you see the loose coupling of the frequency counter.
A check of the tuning capacitor. Sometimes when a lot of channels have been searched for, the ball in the tuning capacitor wears out.
And of course the control over the dial. I use Extram here, which is a local medium wave station on 1330 Khz
And then we'll see if the radio is still playing.
A beautiful completely original chassis.
And then the following is especially for the aerosol can repairers. The cause of the cracking malfunctions but also the sometimes not wanting to play.
This is the switch deck that is burning. This part of the switch needs to be replaced.
Dismantling is quite a precision job. Consider the wiring that should not become too hot. But the tar that is nearby should also not melt.
Here you see the problem. On the left the one that caught fire. On the right the replacement link deck.
Here is the defective switch deck. Right below the burn hole. Cause of contact spray. Switch decks like this can only be cleaned by disassembling everything. And clean well and then dry.
Installing the repaired switch deck.
And then the question arises of whether the radio can still play after all these interventions. Or has the radio now been completely broken?
Sometimes you have wiring that cannot be saved. During loose soldering, the insulation melts like snow in the sun.
And this type of wire is then replaced with an original piece of wire.
And here's the chassis, it looks beautiful and it plays. Despite the many repairs, everything turned out fine.
The beautifully illuminated dial of the Sun
The chassis can be put back in the cabinet. Rear bulkhead in front.
The radio has become a beautiful device again. With a special chocolate cabinet.
