Model 152 PSU dummy loads - Re: NeXT Cube - powers on briefly then off again

[wulfman]

Distilled water will not conduct. Its a perfect insulator. It will work
fine.


On 10/26/2015 7:45 AM, Jerry Weiss wrote:
> Water in the dummy load?      Water cooled - sure.  Water immersed?  Even though I see it posted on the web, i have may doubts it would be a stable method.
>
> Oil  is the usual medium here.     Excluding of course the pre-1980 transformer oils that were notorious for having contaminated PCB’s within or anything with flammability at working temperatures.
>
>
> Jerry Weiss
> WB9MRI
>
>
>> On Oct 26, 2015, at 9:27 AM, Paul Koning <paulkoning at comcast.net> wrote:
>>
>>
>>> On Oct 26, 2015, at 9:43 AM, Toby Thain <toby at telegraphics.com.au> wrote:
>>>
>>> On 2015-10-26 1:02 AM, Brian Archer wrote:
>>>> Even a 10W resistor will get really hot. I embed two 5W resistors into a
>>>> pentium class CPU cooler for a good compromise on space/thermal concerns.
>> My favorite low tech dummy load is the one my father came up with: a couple of resistors (carbon composite is best, carbon film or metal film will do), 1-2 watt size, in a jar filled with water.  Works just fine for 100 watts or so, and is useable not just for power supplies but for HF transmitter testing.
>>
>> 	paul
>>
>>
>


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