3W LED inspection lamp "JANSJÖ" - UK Vintage Radio Repair and Restoration Discussion Forum

John_BS · 17th Jan 2014, 10:15 pm

Had the misfortune of taking a trip up the Purley Way this week, and during a mandatory 3-mile hike through Ikea, stumbled upon two flavours of miniature desk-lamp: one which clamps on the edge of the bench, and one free-standing on a cast-iron base. The goose-neck on the free-standing version is quite long, and for a tenner they seem to offer good value. The LED is lens-focused, so quite bright.

John

Silicon · 17th Jan 2014, 10:44 pm

Does it use a switched mode power supply and does it produce lots of RF interference?

John_BS · 18th Jan 2014, 12:03 am

Quote:

Does it use a switched mode power supply

Yes: small brick.

Quote:

does it produce lots of RF interference?

Well, some, but not at the level where it wipes out reception. There's some impact on the noise-floor of a transistor radio placed a few inches away, but nothing disastrous.

John

MrElectronicman · 18th Jan 2014, 1:38 am

These things are great!, I now have a number of them around the house and in my workshop, the earliest one I have is about 2 years old now and is on more than 12 hours a day every day.

The only thing that has happened to it is that the lens fell off one day, but a spot of crazy glue fixed that.

Never found any RF interference from it either

One thing I've found with them is that the switches are a bit flakey, so I had to change a couple. I tried using the push-on/push-off type but they were not any better, so a miniature toggle switch appears to be the best bet

17th Jan 2014, 10:15 pm	#1
John_BS Octode Join Date: Dec 2008 Location: Wincanton, Somerset, UK. Posts: 1,784	3W LED inspection lamp "JANSJÖ" Had the misfortune of taking a trip up the Purley Way this week, and during a mandatory 3-mile hike through Ikea, stumbled upon two flavours of miniature desk-lamp: one which clamps on the edge of the bench, and one free-standing on a cast-iron base. The goose-neck on the free-standing version is quite long, and for a tenner they seem to offer good value. The LED is lens-focused, so quite bright. John

17th Jan 2014, 10:44 pm	#2
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,169	Re: 3W LED inspection lamp "JANSJÖ" Does it use a switched mode power supply and does it produce lots of RF interference?

18th Jan 2014, 1:38 am	#4
MrElectronicman Heptode Join Date: Feb 2011 Location: Washington DC, USA Posts: 619	Re: 3W LED inspection lamp "JANSJÖ" These things are great!, I now have a number of them around the house and in my workshop, the earliest one I have is about 2 years old now and is on more than 12 hours a day every day. The only thing that has happened to it is that the lens fell off one day, but a spot of crazy glue fixed that. Never found any RF interference from it either One thing I've found with them is that the switches are a bit flakey, so I had to change a couple. I tried using the push-on/push-off type but they were not any better, so a miniature toggle switch appears to be the best bet __________________ David