Hi
Ive been searching all over the place, been to many different sites, reading loads of forum threads about chassis but i havent been able to find what i am looking for.
Im gonna make a Class Ab mono block amplifiers, and are looking for som black nice looking aluminum chassis with heatsinks on. The design: it should look like Xindak XA8800MN monoblocks. Anybody know where to find anything that looks somewhat alike them?
Ive been searching all over the place, been to many different sites, reading loads of forum threads about chassis but i havent been able to find what i am looking for.
Im gonna make a Class Ab mono block amplifiers, and are looking for som black nice looking aluminum chassis with heatsinks on. The design: it should look like Xindak XA8800MN monoblocks. Anybody know where to find anything that looks somewhat alike them?
solviken,
The best power amplifier chassis has a form-follows-function style that is optimized for cooling and reducing RFI/EMI.
The best aluminum heatsink profiles like the KL-271 typically provide over 2x the cooling capability of the aluminum heatsink used in a common chassis. The Xindak XA8800MN monoblock uses a heatsink with a "T" shape shelf profile that mounts the TO3 transistors on a shelf several inches removed from the cooling fins-air interface, and data shows that this provides about 50% the cooling capability of transistors directly mounted to the fin backside of the KL-271 profile. The sealed heatsink top of the Xindak will keep out dust, but keeps in far more heat than an RFI screen.
Personally, I spend my money on the best heatsinks and construct the chassis from locally available steel and aluminum material. This allows me to construct a magnetically shielded steel box to house the transformer and inductors for the CLC power supply. I have to machine holes and brackets for transistors, transformers, capacitors, power cords, power switches, etc... anyway.
The best power amplifier chassis has a form-follows-function style that is optimized for cooling and reducing RFI/EMI.
The best aluminum heatsink profiles like the KL-271 typically provide over 2x the cooling capability of the aluminum heatsink used in a common chassis. The Xindak XA8800MN monoblock uses a heatsink with a "T" shape shelf profile that mounts the TO3 transistors on a shelf several inches removed from the cooling fins-air interface, and data shows that this provides about 50% the cooling capability of transistors directly mounted to the fin backside of the KL-271 profile. The sealed heatsink top of the Xindak will keep out dust, but keeps in far more heat than an RFI screen.
Personally, I spend my money on the best heatsinks and construct the chassis from locally available steel and aluminum material. This allows me to construct a magnetically shielded steel box to house the transformer and inductors for the CLC power supply. I have to machine holes and brackets for transistors, transformers, capacitors, power cords, power switches, etc... anyway.
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Looks like the Jaycar Electronics one only longer
Diecast Heatsink - 200mm Long
This heatsink has 20 fins and a flat base, so it will mount on a panel easily and can actually form the side panels.
- Thermal resistance = 0.552°C per watt
- Size: 200(L) x 75(W) x 48(H)mm finished length. QTY1+$25.954+$23.3510+$20.70
Diecast Heatsink - 200mm Long - Jaycar Electronics
Diecast Heatsink - 200mm Long
This heatsink has 20 fins and a flat base, so it will mount on a panel easily and can actually form the side panels.
- Thermal resistance = 0.552°C per watt
- Size: 200(L) x 75(W) x 48(H)mm finished length. QTY1+$25.954+$23.3510+$20.70
Diecast Heatsink - 200mm Long - Jaycar Electronics
If you search diyaudio you will find several references to Seifert Heatsinks which include the KL-271 profile. The black anodized KL-271 extrusion is considered one of the best natural convention profiles with about 0.15 C/W for a 300mm length, 200mm height, and 83.5mm fin height. It is recommended for the Leach Amp, and you can find more discussion info at that site. There have been a couple quanity group buys for the black anodized ~$75 + shipping USA.
Seifert-Electronic - Products
http://q04.digtion.de/qanportal/Uploads/seifert_punkte/pdfs/47[0].pdf
Heatsink USA is a diyAudio manufacturer with a 10.08" wide non-anodized heatsink with good specs and a low USA price. Heatsink USA also sells on eBay. Russell Boss Extruded Aluminum Heatsinks from HeatSinkUSA
I build 3-channel amps to multi-amp each speaker using 3-heatsinks for L+R+Back + a steel box in front to magnetically shield the transformer and CLC inductors, so I have never searched for a standard chassis. My diy chassis is W=17", D=17", H=8"+legs. In the USA Home Depot, Lowes, Orchard Supply stores have enough steel and aluminum stock to build a decent chassis.
Have a look at http://www.rs-online.com they have quite an impressive range of heatsinks too.
I've purchased from Silicon Ray before:
SiliconRay Online Electronic Store - Boards | Kits | Components | Modules | Tools
SiliconRay Online Electronic Store - Boards | Kits | Components | Modules | Tools
go straight to the source, Jaycar get these heatsinks from Conrad Heatsinks in Australia the one you link would be the MF20-75
which goes for $17.26AUD for a single if you buy direct, which is 3 dollars cheaper than the 10+ price at Jaycar
http://www.conradheatsinks.com/products/flat100_350.html#MF20
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Hifi2000
modushop.biz
for size reference...The largest transformer is 650va and the smaller 250va
50m deep, 40 wide, 20 tall
modushop.biz
An externally hosted image should be here but it was not working when we last tested it.
for size reference...The largest transformer is 650va and the smaller 250va
50m deep, 40 wide, 20 tall
Have a look there: Hi-Fi 2000 contenitori per l'elettronica, case modding HTPC, Galaxy, rack, DIYaudio, computer cases, front panel express, knobs,milled Handles, milled fronts, hi-end, , but be aware that you will have some extra mechanical work, because the bottom boards are rather thin.
I dont really think the heatsinks are suitable for an amp that size on the modushop cases. they are quite large chassis and you would be tempted to put a pretty beefy amp in there and i simply dont think the profile is up to it, you could replace them of course. otherwise they seem decent for the money
Wow, they have some really nice rack chassis! Do they have a USA distributor?
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