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Liquid Cooled Luxman?

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Tis a beast, pretty one too. Not sure about the liquid cooled part, but perhaps the heat sinks have some kind of oil in them like a radiator, but the fins at the back of the receiver look like extruded aluminum to me. :dunno:
 
There were receivers and amps with a tube that sat over the outputs and it was liquid filled, at the other end of the tube would be a set of fins. Yamaha's R-100 was cooled this way. I am not sure whether the tube was divided internally so that hot liquid would flow out the top section and cooled liquid come back along the bottom.
 
I believe the seller may be somewhat mistaken. Some receivers and amplifiers of the time were using a "heat pipe" containing a refrigerant at critical pressure to conduct away the heat generated by output devices clamped onto one end to a series of large thin sheetmetal fins clamped onto the other end of the pipe much in the fashion of fins on a hot-water baseboard radiant.

The freon boils out of a permeable material on the inside walls of the sealed pipe, aborbing large amounts of heat, and then the vapor migrates down the middle of the pipe to the cooler end, where it condenses, giving off all the latent heat absorbed at the other end--and then oozes back into the permeable material to flow back down to the warmer end to repeat the process. (See http://en.wikipedia.org/wiki/Image:Heat_Pipe_Mechanism.png)

This is supposedly very efficient method using a contrivance of much lighter weight than a conventional heatsink. I've seen them, and I wasn't all that impressed. Also one should not operate on end an amp using one of these systems. I did this one time, and--while no harm was done--the system wasn't doing its job that well: the transistors were firey hot, while the fins remained relatively cool!

When I put the receiver back into normal position the whole assembly started to hammer like an old-timey steam heat radiator. :D
 
Some Luxmans used heatpipes for cooling their ouput stages. Not sure if this unit employs that method or not. Most newer computers use this technology in one form or another. It is a copper tube filled with a refrigerant-like gas that carries the heat from one end of the pipe to the other, through evaporation and condensation of the gas. One end has the transistors on it, the other has the cooling fins. Google "heatpipe" and you will have an afternoon's worth of reading.
 
I've never heard of liquid cooling, but that doesn't mean anything. Heatpipe I'm familiar with. I'm pretty sure this Luxman uses neither. Nice receiver, but that $400 BIN is going to scare away most buyers.
 
i had a frankincomputer that was cooled with frozen chicken breasts.had to shut down every 3-4 hours to re freeze then was go to go.then i ate them and was forced to buy a fan.
 
coward said:
i had a frankincomputer that was cooled with frozen chicken breasts.had to shut down every 3-4 hours to re freeze then was go to go.then i ate them and was forced to buy a fan.
Click to expand...

:lmao: Did you have to wash your hands after working on the computer to prevent Salmonella poisoning?

I've seen the systems that were, except for the drives, immersed in mineral oil tanks.
I also remember the first 1ghz processor was cooled with a Freon-based heat exchanger, complete with compressor, like a refrigerator's system.
 
they were packaged..safty first.i'd tip the tower on its side placed chicken on the cpu,good to go!Ya pretty funny especially when friends came over,"hey man can i check my email.Sure grab the chicken".......WTF?
cheers
 
coward said:
i had a frankincomputer that was cooled with frozen chicken breasts.had to shut down every 3-4 hours to re freeze then was go to go.then i ate them and was forced to buy a fan.
Click to expand...
That's insane. I have been forced to use the box-fan cooling method, though. Open up case, position fan, let 'er rip...

I've seen the mineral-oil cooling done pretty well before, but then again it has to be - if it leaks you're screwed. It's not hard - pretty much all you need is an aquarium. I've also seen some people use vegetable oil. Yuck.
 
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