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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 13th May 2021, 8:39 pm   #21
peter_sol
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Default Re: Selga 405 audio problem.

Well done. Once again various contributers to this forum have helped you solve the puzzle.
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Old 13th May 2021, 9:18 pm   #22
Radio Scotland
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Default Re: Selga 405 audio problem.

Quote:
Originally Posted by peter_sol View Post
Well done. Once again various contributers to this forum have helped you solve the puzzle.
Definitely peter, I knew the problem was right under my nose, And i finally worked it out when you made the comment about running the centre tap to earth,


Cheers
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Old 13th May 2021, 9:56 pm   #23
Radio Scotland
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Default Re: Selga 405 audio problem.

Begs the question of how the transformer broke free from the PCB But the rest of the radio is pristine
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Old 16th May 2021, 2:01 pm   #24
Radio Scotland
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Default Re: Selga 405 audio problem.

I'm quite impressed by the sensitivity of this radio, It might have some design peculiarities and it isn't the best build quality, But it works well.

Thanks to peter sol for donating the output transformer, I came across an old post which states the output transformer spec for the 404 model, I'm presuming the 405 uses the same transformers.


Primary: 2 x 225 turns, 0.15mm wire, 7 Ohm
Secondary: 60 turns, 0.35mm wire, 0.6 Ohm


Jay
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