A40

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I found this piece at the local electronic junk store, thought that it was really cool, and that I would be the only one to have such a wierd device with the heat sinks turned toward the center. Then I saw a very similar piece in a 1978 Nelson Pass article about the A40 amp. Anybody know what it is?
 

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First of all I suspect that the heatsink assembly you show is only part of some other larger assembly. What was the purpose of that assembly you ask? - it's impossible to know. If I had to guess I would say it was 1) part of a large analog power supply or 2) the output stage for a large amplifier. Keep in mind that there are lots of different types of amplifiers and only some of them are suitable for audio. To get a better idea you would need to sketch out the circuit of what you have, then look up the power transistor specs.

I think you had it nailed in your first post. The heatsink alone would make a great basis for an A40! It's unlikely that you could use the whole thing as the output section of a first class amp. I've never been that lucky with my surplus store finds. But then again - you might be.

Graeme
 
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