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Old 26th Jun 2022, 7:35 am   #13
Join Date: Apr 2021
Location: Paris, France.
Posts: 81
Default Re: TELEFUNKEN 3309 (914 chassis) TV

I am just thinking of a possible reason why you found no sound: at the time of production of this set, a law was passed in Germany stating that the sound of TVs should be muted when there was no picture at the same time (in practice: no sync).
This law was supposed to prevent people from listening to police transmissions (it was at a time when there were terrorist actions in Germany).
That might be the reason why you hear no sound.
If this is the case, it shoud be relatively easy to unmute the sound (the mute command comes from the sync circuitry).
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