Vintage Telefunken preamp plz help!!

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dthodoris

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Apr 5, 2017
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Hello everyone, i have a very old piece of equipment its a Telefunken preamp made in Brasil.Unfortunately i dont have any other information...It doesnt have tubes on (i dont even know what type of tubes to put) and it is said to be faulty.Any help regarding schematics would be appreciated! (google did not help on that i couldnt even find a photo of the preamp!)
 

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Try this. Its’ hard To know without a Model name or number at least

https://www.hifiengine.com/manual_library/telefunken.shtml

Not sure if it’s worth it other than keeping plastic out of our oceans.
 
dthodoris said:
Hello everyone, i have a very old piece of equipment its a Telefunken preamp made in Brasil.Unfortunately i dont have any other information...It doesnt have tubes on (i dont even know what type of tubes to put) and it is said to be faulty.Any help regarding schematics would be appreciated! (google did not help on that i couldnt even find a photo of the preamp!)
Seems like a HiFi product. You need to trace the circuit. Looks like the tube are noval or maybe the smaller 7-pin type. Anyway, you need to trace the heaters, generally easy to trace because they diasy-chain from one tube to another. Then you can bet the tubes are either pentodes or dual-triodes (not very likely with a 7-pin type). Follow the signal path from the input connector to the first tube (threre may be a switch, you have to trace the signal path with a VOM).
 

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