Using lamp current limiter
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Just made up a lamp current limiter. But could not buy 100W bulbs from anywhere.
All they have are LED bulbs 8.5W 10W and current they draw is about 90mA. I plugged one of the LED bulb into the limiter, and plugged in a soldering iron of 30W. The soldering iron got hot, but less hotter than usual. And LED lamp of 8.5W never come on. Could you explain what is happening here? Thanks. |
Re: Using lamp current limiter
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Re: Using lamp current limiter
You cannot use LED lamps in a conventional lamp limiter circuit.
The Lamp limiter relies on the fact that a cold lamp has a low resistance which increases as the lamp gets hotter. LED lamps are constant power at best. Look for Incandesent lamps or rough service lamps. Cheers Mike T |
Re: Using lamp current limiter
They said that they don't sell normal 100W bulbs anymore because it is not energy efficient. Max Wattage bulb they had was 40W.
I have been to 3x different local supermarkets looking for the 100W normal bulbs. I shall just have to get 40W bulbs, and change the LCL to take 2x separate bulbs of 40W each. Ahh... mail order? Maybe that's where I must look into. Thanks for the link. |
Re: Using lamp current limiter
You won't get rough service lamps from a supermarket or DIY outlet.
Try an electrical wholesaler or buy online. |
Re: Using lamp current limiter
It is no longer possible to legally sell 100W incandescent lamps for general use. You will need to look for professional 'rough service' lamps, or build a limiter using several lower wattage lamps in parallel. 40W 'fireglow' lamps are still available from Poundland.
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Re: Using lamp current limiter
My local Tesco's sell 100-watt B.C. halogens.
Al. |
Re: Using lamp current limiter
If anyone wants a few 60W BC incandescents I have a crate of large globe bulbs here waiting for service as limiters.
Not sure how well they would survive in the post though |
Re: Using lamp current limiter
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Re: Using lamp current limiter
Two posts moved to this thread:-
https://www.vintage-radio.net/forum/...d.php?t=162155 I'll close this thread as there's nothing more to be said. |
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