It's not quite as warm here in the UK but I find that PC heatsinks, one for each chip, and used properly (ie using conduction) work fine.
The amp below uses 37 volt rails and the heatsinks never get above luke warm. The heatsinks sit over circular apertures in the base plate so that air is drawn up and expelled through the apertures in the lid.
An externally hosted image should be here but it was not working when we last tested it.
There is nothing stopping you adding an extra piece of aluminium to the heatsink if you think that you may require more cooling.
Passive CPU heatsinks are not very good
I was thinking of using passive cpu heatsinks as well but found out that its not a very good idea.
CPU heatsinks were designed for active cooling so they have very little spacing between the fins and rely on a high airflow to move the heat away quickly. This design has very bad performance with passive cooling and no airflow.
I was thinking of using passive cpu heatsinks as well but found out that its not a very good idea.
CPU heatsinks were designed for active cooling so they have very little spacing between the fins and rely on a high airflow to move the heat away quickly. This design has very bad performance with passive cooling and no airflow.
IF you want a cheep heatsink for your gain clone, just go on ebay and have a look about for old pentium II/III type heatsinks without the fan. I picked up some decent foxcon ones for my project and they seem to work great (although the thing still ahsn't been powered up propperly as I need more tools to finish off the case)
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Re: Re: distilled water's no good
the slightest contamination of the distilled water will change its dielectric properties and i wouldn't want that.
iow, you can say
to your clone...
There's recently been a thread about this, can't seem to find it but if you search a little harder than i did you probably will.
the slightest contamination of the distilled water will change its dielectric properties and i wouldn't want that.
iow, you can say
to your clone...There's recently been a thread about this, can't seem to find it but if you search a little harder than i did you probably will.
GC Heat
Llike bigparnsip, I've got the computer heatsinks going. I'm using small brass bars to push the chip onto them for max thermal xfer. With 35V rails it barely gets hot in normal operation.
Llike bigparnsip, I've got the computer heatsinks going. I'm using small brass bars to push the chip onto them for max thermal xfer. With 35V rails it barely gets hot in normal operation.
An externally hosted image should be here but it was not working when we last tested it.
Pentium 4 stock heatsinks are wonderful. Designed to dissipate 85W of heat, near silent, and easy to mount. All you need to do is design your PCB with the 4 mounting holes. Go to a local computer shop and see if you can get dead motherboards. Take the P4 bracket off to use. And whalla, you have a wonderful HS.
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