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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It's a forced air heatsink assembly. You mount a fan on one end to blow air through it. Probably a 4" fan would be my guess.
Graeme
Graeme
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
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
Hi !
It look like an old voltage regulator (line), from old Server-psu.
Good old gear!
I be able to see similar staf on the local scrapyard, very cheap about 10 Euro/14$
Fan is 120x120 (4,7244").
Mr.Nelson it is older than you😉 !
Regards zeoN_Rider
It look like an old voltage regulator (line), from old Server-psu.
Good old gear!
I be able to see similar staf on the local scrapyard, very cheap about 10 Euro/14$
Fan is 120x120 (4,7244").
Mr.Nelson it is older than you😉 !
Regards zeoN_Rider
Re: Hi !
No, it has transistors in it. 😎
zeonrider said:Mr.Nelson it is older than you😉 !
No, it has transistors in it. 😎
Re: Hi !
do you mind buying few for me ?
zeonrider said:It look like an old voltage regulator (line), from old Server-psu.
Good old gear!
I be able to see similar staf on the local scrapyard, very cheap about 10 Euro/14$
Fan is 120x120 (4,7244").
Mr.Nelson it is older than you😉 !
Regards zeoN_Rider
do you mind buying few for me ?
Hi Zen Mod !
No, tomorow when I come back has gone,or sold.
But Bubanj Potok je keva. Pogladacu.I told you(by phone) half year ago that I, have many heatsinks.
Remamber Aleph PCBs by Kostas.
Regards zeoN_Rider
No, tomorow when I come back has gone,or sold.
But Bubanj Potok je keva. Pogladacu.I told you(by phone) half year ago that I, have many heatsinks.
Remamber Aleph PCBs by Kostas.
Regards zeoN_Rider
Re: Hi Zen Mod !
😀
zeonrider said:No, tomorow when I come back has gone,or sold.
But Bubanj Potok je keva. Pogladacu.I told you(by phone) half year ago that I, have many heatsinks.
Remamber Aleph PCBs by Kostas.
Regards zeoN_Rider

Re: Re: Hi !
So, you born in tube era . . . ?
I was born under candle light . . .

Nelson Pass said:No, it has transistors in it.
So, you born in tube era . . . ?
I was born under candle light . . .

Complementary darlington output followers. You could make
an amplifier pretty directly with that.
an amplifier pretty directly with that.
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