300W Resistive load?

Light bulbs? Two in series and then as many of those in parallel as needed.

Sounds good one 60W bulb is about 200 ohms.I'll look around for some small cheap bulb mounts.

Maybe two or three electric irons in parallel.

If this will be anything other than a temporary lashup, you'll want a fuse rated to interrupt 200VDC.

Drat, of course I meant in SERIES.

At 200V each bulb gets only 100V so the resistance will be a little lower. You could measure that if it must be precise.

You can also solder to them. If careful they can later still be used for their intended purpose. But make sure you place them onto a heat resistant surface during the test :-)

Good news is you may not even have to drive all the way to Home Depot. Supermarkets also have a variety of them. Of course, then your wife might hand you a lengthy "while you are there anyhow" list and you don't get to look at all the new power tools, barbecues and stuff. Man's toy store ...

On a sunny day (Sat, 17 Jul 2010 10:21:07 -0400) it happened Hammy wrote in :

Please note that when cold a lightbulb is 1/10 the resistance. So you supply may not start up at all. Better take apart some electric heater.

I have NTC inrush limiters for that.

It should also take some ms for the controller to start-up during this time the bulbs would be supplied from a rectified line, should heat them up enough.

The controller is supposed to hiccup anyways in the event of a short.

But you are right if I do run into start-up problems I'll look into that.

I don't need high precision if I can test at even 80% rated load and maybe do some pulse test and off course use a CT to check the input current I'll be happy.

Your taking all the fun out of this :-)

We call that a honey do list here.;-)

toster oven ?

Well, just wanted to mention that because when at undervoltage the bulbs will present a higher load. Also, when you start any kind of converter from zero they will almost look like a short initially. Same if you connect a cold bulb (cold filament) to a running converter. It's not like a power resistor.

The fun might come back when connecting the cold bulbs not two by two, but all at once. Tchk ... *POOF*.

Nah, a honey-do list isn't grocery shooping, it's when the missus wants you to get that tree stump out over yonder, and it's 105F :-)

Better pick up extra incandescent bulbs, comes 2014, you wont be able to get them here in the US.

Cheers

Small electric heater with switch able power level.

I d>What is something cheap and simple that can be used to dissapate 300W

John Ferrell W8CCW

Probably not quite. First, there'll be another election before then and ... well, we'll see.

Then the ban extends down to 40W AFAIK. I am sure some clever business will start selling 39W light bulbs. The basic idea seems to come from Poland:

A gray market might also develop. In Germany where 100W bulbs have been banned long since they are still happily selling them:

As for frosted ones which were particularly frowned upon by regulators the page states "Bei Lampenwelt.de erhalten Sie matte Glühlampen noch aus größeren Restbeständen. Lieferung sofort ab Lager solange der Vorrat reicht!" which means " ... frosted light bulbs from large overstock. Prompt delivery as long as stock lasts!". For some reason it must have lasted more than a year by now :-)

Ban, compliance, two different things it seems.

Problem is, with a 200V application you'll need two and that gets to be expensive. Same with toaster ovens and stuff.

Unless you had a use for the items later, such as raising chickens :-)

Used these before for a 5KW load. Ceramic Cone heaters, can also get them straight vs cone. example:

Cheers

orrat

Yeah.... and then we'll have to deal with all the advertising hype for those "innovative" companies that come up with a 39.9 W bulb and claim some benefit derived therefrom.

I wonder if this is how that extra 9/10th of a cent per gallon we pay at the gas pump came into being..??? :)

Or the $999.95 laptop. It's all about making a buck :-)

Get a few of these. Junk or surplus preferred, but hell, they're pretty = cheap new.

Tim

--=20 Deep Friar: a very philosophical monk. Website:

new.

$10 is cheap? That's more than a six-pack of the good stuff.