My 8Kg water cooling 75W Class A Mono block

[Simon62]

This conceptual test of its success, just gave me the confidence to do a class A amplifier close to 300W output to drive my beloved Silverline Bolero Supreme Speaker, I believe that water cooling is the most economical method.

[IRSound]

i prefer large a heat-sink

[Boscoe]

Originally Posted by IRSound

I prefer a humongous heat-sink

Edited!

I think this is great I have been toying with a similar idea for a while now but am broke atm! What's a G5 dedicated pump?

[Simon62]

Originally Posted by Boscoe

Edited!

I think this is great I have been toying with a similar idea for a while now but am broke atm! What's a G5 dedicated pump?

MCP350 - Rouchon Industries Inc., dba Swiftech - PC Liquid Cooling Systems CPU Cooler VGA Water Block Heatsink Pump Radiator Heat Exchanger Kit

[Workhorse]

Hi Simon,
Neatly engineered concept, i like it......

Just one suggestion, use a wide washer with the allen key screws for mounting the devices, in this way the force on the devices will distribute more evenly, using TO-264 actually demands the force should be applied above die area in order to get tight thermal coupling. Better to use copper bar on them for tightening as well, since you are running them in class-A.

Kanwar

[AKSA]

Lovely work, Simon, I did this once years ago on an Elector design, used a dishwasher pump and circulated the coolant through underground pipes, using the earth as heatsink. It was very effective, ran below room temp, but from time to time during quiet music you could hear a gurgling sound was a bit offputting......

My congratulations, wonderful, appropriate use of very economical computer cooling technology.

Hugh

[Archmage]

As a PC watercooling junkie, I feel I should chime in:

The pump is a Laing DDC series, commonly used in PC watercooling.

Laing DDC comes in several different varieties:

DDC 3.1 AKA Swiftech mcp350 = 9W, low RPM

DDC 3.2 AKA Swiftech mcp355 = 18W, high-RPM

DDC 3.25 AKA Koolance PMP-400 = slightly higher wattage and RPM

Swiftech's MCP35X is essentially a DDC 3.2X with PWM control. It works well.

All DDC varieties respond very favorably to a replacement top (volute chamber). The one pictured appears to have a transparent top. It's possibly manufactured by XSPC. EK makes a good top as well.

Laing D5 = Swiftech mcp655. This comes in several varieties now...it's larger, but also an excellent pump.

Fans: The Noctua fans are good. The best fans, IMO, are from the Scythe Gentle Typhoon line. The AP-13, at 1150 RPM, is plenty of airflow. To control noise: Voltage control works slightly better than PWM control, in general.

Radiators: XSPC RX performs well with low RPM fans. Swiftech MCR is most cost effective.

Coolant: Distilled water + a silver "kill coil" placed in the reservoir = sufficient. The coolant need not be colored.

That said: I don't think I'd be willing to run anything louder than a slightly undervolted mcp350 or mcp655 at a low speed setting and a few sub-800-RPM fans. The behemoth heatsink method works...Efficiency could be further improved with the use of heatpipes to distribute the load.

Edit: http://www.sidewindercomputers.com/pumps.html - Here is a good representation of the commonly used pumps in PC watercooling.

[Simon62]

A new toys 25+25W class A amp, use one 12CM fan only.

[aptquark]

YES!

Its about time someone used this technology where it counts.

I have been into watercooling PC's way before the commercial applications came out. Hell, I designed and utilized my own water blocks. I remember cooling my 500mhz Duron to almost 1.2GB. The performance increase was insane.

[Simon62]

another 75+75W almost complete