Heatsink Extrusion

[Charles Hansen]

Hello -

I have a vague memory of a top-line Japanese power amplifier from the 1980s that had a very unusual heatsink extrusion. Instead of having fins, it had hexagonal "cells". It may have been Luxman, but I'm not sure. A quick search of the web didn't turn anything up. Does anybody remember this amp? Any help would be appreciated.

Thanks,
Charles Hansen

 

[jam]

Pioneer A-90 and family.

 

[jam]

Charles,

I have one sitting on my bench. It's yours if you want it.

 

[Charles Hansen]

Hello Jam,

Thanks for the kind offer! That is the extrusion I was thinking of. It must be quite difficult to make, requiring a costly extrusion die.

Didn't someone else also use a similar extrusion? I still have a fuzzy memory of a silver amplifier that had these hexagonal extrusions externally placed on each side. But maybe I'm just getting old and senile...

Thanks,
Charles Hansen

 

[woody]

Charles,

Luxman did have an amp that had square cells. The major part
of the sink was ~ 5" wide 5" high and ~1" deep with 4 one inch
square cells.

Regards,
Woody

 

[Charles Hansen]

Thanks for the info Woody. I'm pretty sure that was the one I was thinking of. Do you remember the model number of that amp?

 

[Frazzled]

Charles,

I have one sitting on my bench. It's yours if you want it.

Strictly speaking of design esthetics, that pioneer is pretty sweet!

 

[jam]

More Heatsink Porn!

You guys might mean the Luxman L-85V.

 

[jam]

Another shot.

 

[jam]

Last one.

 

[jam]

One for you Charles..............😀

 

[K-amps]

Hello Jam,

Thanks for the kind offer! That is the extrusion I was thinking of. It must be quite difficult to make, requiring a costly extrusion die.

Didn't someone else also use a similar extrusion? I still have a fuzzy memory of a silver amplifier that had these hexagonal extrusions externally placed on each side. But maybe I'm just getting old and senile...

Thanks,
Charles Hansen

Charles,

I also remember a Luxman with those heatsinks... Dont remember the model but I do remember it used toshiba's 2sd424 and B554 in the OP stage and was rated at 180wpc @ 8E.

Those sounded sweet.

Cheers!

K-

 

[K-amps]

I think is was the Luxman M4000.

180 wpc into 8e in Silver finish.

K-

 

[jam]

This is it..........................the M6000. The M4000 used similar sinks.

I am not sure if it was an extrusion it might have been a casting that was machined.

 

[K-amps]

Yes the M4000 looked the same only smaller and was not Dual mono if memry serves..... The M6000 was 300wpc I think...

 

[K-amps]

Here's the M4000:

http://www.luxman.fotopic.net/p387447.html

 

[jam]

K-Amps,

Charlie owes us big time..................😉😀

 

[K-amps]

Oh Yeah! 😀

 

[Frazzled]

I am NOT affiliated with THIS seller...

LUXMAN M-4000U

Kinda pricey don't you think?

 

[K-amps]

Yes it is overpriced by about $400 unles it IS really MINT.