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Old Electronics

Old valve radius

Haxxan24
hace 5 años
hace 5 años
IMG_20191028_131522.jpg [3.63MB] Hello friends I have a radio repair .. old whose valves are 80 2a5 75 57 58 I am trying to restore it since I economized with two wires of a loose coil. Valve 75 does not turn on (I guess the reason may be those loose wires .. I guess) the other valves turn on perfectly. I have no speaker and the transformer is not .. I would need a scheme of this radio would be of great help since the chassis does not say any mark or anything.
first
first
236
hace 5 años

Don't you have the brand? put a picture even

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first
first
236
hace 5 años

and reDIOS, beautiful piece of history, on top of the transformer it puts? harmony? could be a telefunken

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Haxxan24
hace 5 años

Bremia says there I send a photo

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Haxxan24
hace 5 años

And above the transformers says three crowns

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first
first
236
hace 5 años

the exact scheme I see difficult, look through the datasheet of the valves to the output impedance that works, so that you can get an output transformer, I have used 220 to 12 volt current transformers as a transformer for the small speaker in this In this case, on the part of the 220 you put the plate plate load and on the part of 12 an 8 ohms loudspeaker, as a test at least it is valid, since if you want something precise you have to send it to be done or buy it from the impedances that Use the amplifier tube. regards

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Haxxan24
hace 5 años

Thanks first as soon as. Get the transformer and the speaker I put it to the test .. I already got a very similar scheme of an Rca Victor 28 and apparently everything is in order. Valve 75 is dead, which I also got new. So we'll see what happens ..

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oswaldo lizarraga
hace 5 años
hace 5 años
Hello on this page you will find countless receivers and amplifiers to valves of various brands and models, you would like to find some similar to your models and valves that can help you. https://www.hora13.com/nostalgias/APARATOS%20VIEJOS/circuitos%20gratis.htm
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