Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...
Electronic load
Aug 13, 2013
40 Replies
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...
Have you tried a toaster, toaster oven, etc?
5 or 6 100 watt tungsten halogen bulbs?
TTman Inscribed thus:
500W Halagen bulb.
Best Regards:
Baron.
just remember it is pretty much a dead short until it heats up
-Lasse
Give me your mailing address and I will send you two 10R 250W resistors. Small heat sink may be needed. Cheers, Harry
Heathkit used to sell a load for use with transmitters. If I recall correctly it was about ten 2 watt resistors suspended in a gallon of oil.
Dan
Thanks, but it's for a company... they can pay...
I'd oversize it a bit and use 5 200Watt resistors. For a similar load I used this heatsink:
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You may expect the load to be present for 1 minute but in reality it may need to run longer.
Otherwise look for an electronic load from Array and use two 300W units in parallel.
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
nico@nctdevpuntnl (punt=.)
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Five 100 watt or larger resistors are fine for a 1 minute test. whats the duty Cycle? A Muffin fan blowing across the resistors helps a lot.
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has Edison Base cone heaters, but they are
120v.
Cheers
"TTman"
** Is it DC or AC and if the latter what frequency ?Makes a big difference to what load is suitable.
.... Phil
In that case, here ya go...
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watch the wrap
Real Engineers use these Vishay power resistors...
Plus they are not expensive and very robust. Dont forget to order the hardware for mounting.
Cheers
But they are wimpy at only 200W. Just like engineers, maybe. Get the
600W version and please Tim the Tool Man.
It was a 50 Ohm, 200 W non inductive carbide resistor, and the product was their famous 'Cantenna'. The ham magazines showed DIY versions built with whatever surplus resistors you could cobble together.
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
He was canceled a decade ago, because he could no longer buy insurance.
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
Most toaster and toaster ovens are in the 1000W region and use a bang-bang temperature controller...
Check out the Vishay-Sfernice LPS300 range. 300W per unit up to 85C/ Rth case-heatsink 0.112C per watt.
A couple of 10 ohm ones, in series, bolted to a really big heatsink, should do 500W, 100V, fine.
Farnell should have them in the UK.
Read the datasheet, and do what it says...
"Design is the reverse of analysis"
(R.D. Middlebrook)
http://www.orcadxcc.org/content/cantenna_va7jw.pdf
light bulbs
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