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

[Toby Thain]

On 2015-10-26 1:23 PM, Ian Finder wrote:
> This thread took a turn for the absurd. Oil? Water? What a practical
> bunch of people. /s
>
> They make resistors with adequate cooling... Almost as if they're
> rated for a certain number of watts of dissipation and you can buy
> them based on that. They are resistors after all.
>
> And if they overheat-- oh wait, they're heavy duty resistors, not
> ICs. Get a couple, put them in a metal project box, put it inline
> with the cable, and call it a day.

Damn, I already ordered a pile of HVAC gear.

j/k - yeah that was what I was basically planning, Ian ... just as a 
noob, I'm not totally confident with what a single air cooled part can 
dissipate.

(The thread was kind of interesting anyway!)

--Toby

> Sent from my iPhone
>
>> On Oct 26, 2015, at 09:24, simon <simski at dds.nl> wrote:
>>
>> please skip this ridicule and grab yourself a couple of headlights from a car.
>>
>>
>>
>>> On 26-10-15 17:16, Dale H. Cook wrote:
>>> My recommendation of oil is based upon my decades of experience with broadband dummy loads from 60 watts to 2.5 kilowatts. The dummy loads that I have worked with for medium wave and below and from 5 kilowatts down have all been convection air cooled. Broadband dummy loads that I have used for higher powers (up to 25 kilowatts) have been forced air cooled.
>>>
>>> I prefer to stick with what I have experience with. As for water, YMMV.
>>>
>>> Dale H. Cook, Radio Contract Engineer, Roanoke/Lynchburg, VA
>>> http://plymouthcolony.net/starcityeng/index.html
>>
>> --
>> Met vriendelijke Groet,
>>
>> Simon Claessen
>> drukknop.nl
>