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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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1st Mar 2020, 10:22 am | #1 |
Octode
Join Date: Feb 2006
Location: Ilkeston, Derbyshire, UK.
Posts: 1,397
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Old and new strip light sizes
Hello all,
I need to replace the original hob light in an early 60s cooker. The trouble is that the nearest modern equivalent size of 284mm (LED version) is just slightly too short by a few mm and won't sit in the holders. The design of the end holders in the cooker is such that they can't be bent inward or moved as they are on rigid brackets with a locating stud in the casing of the lamp hood. Have to admit I'm a bit stuck with this one! The second photo shows the size discrepancy with the left-hand caps of both lamps dead in line. Steve |
1st Mar 2020, 10:41 am | #2 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
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Re: Old and new strip light sizes
My first thought would be to add some sort of extensions on the ends to bridge the gap between the contacts in the lamp and those in the holder, but this does rather depend on how the lamp is held at each end. An image of the holder may be helpful.
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1st Mar 2020, 10:50 am | #3 |
Octode
Join Date: Feb 2006
Location: Ilkeston, Derbyshire, UK.
Posts: 1,397
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Re: Old and new strip light sizes
Here you go, Dave.... The holders are porcelain with a sprung solid brass plunger.
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1st Mar 2020, 11:06 am | #4 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,528
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Re: Old and new strip light sizes
Move one of the holders? Slotting the fixing holes shouldn't be too difficult.
Moving it back if you find an original later would be easy, too. LED strip might be a bit unhappy with stove ambient temperatures anyway.
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1st Mar 2020, 12:52 pm | #5 |
Heptode
Join Date: May 2010
Location: Warminster, Wiltshire, UK.
Posts: 682
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Re: Old and new strip light sizes
All the lamps these days are not from proper manufactures. I have had filament ones to long and had to file a bit off to get them to fit.
Just one idea with yours. As long as the ends are not aluminium would it be possible to solder a couple washers on the end of the lamp to space it out .Andy |
1st Mar 2020, 1:12 pm | #6 |
Dekatron
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
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Re: Old and new strip light sizes
I had a similar problem whe replacing the 1000W quarz bulb of an old movielight with a slighty shorter 300W one. I found a tubular rivet (it might have been an eyelet) that fitted over the contact in the holder that was just long enough to make the bulb fit. I only needed to fit it at one end.
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1st Mar 2020, 4:16 pm | #7 |
Octode
Join Date: Apr 2016
Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK.
Posts: 1,377
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Re: Old and new strip light sizes
Hi Steve,
I can't believe the proper lamps are no longer obtainable: that's the route I would go down rather than LED. There must be people on here who could find a few in their stocks, after all these were everywhere at one point. Might be worth a wanted post! Cheers Nick |
1st Mar 2020, 5:48 pm | #8 |
Dekatron
Join Date: Jun 2009
Location: Staffordshire Moorlands, UK.
Posts: 5,263
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Re: Old and new strip light sizes
Is it a reputable make? 284mm is 284mm, surely. If it's short then it must be out of spec.
A look on the Energiser datasheet (CPC) states a max ambient temperature of 40C. Filament striplights still available.
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Kevin |
1st Mar 2020, 6:37 pm | #9 |
Pentode
Join Date: May 2010
Location: Sandviken, Sweden
Posts: 233
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Re: Old and new strip light sizes
I have had this problem with some ordinary screw based light bulb, a blob of solder on the end have worked for me. Otherwise solder some washers or similar as suggested by bionicmerlin.
A possible problem though may be if there is a wire soldered to the end cap inside the lamp, it may fall off. Or the plastic may melt if it gets too hot. |
1st Mar 2020, 8:13 pm | #10 |
Octode
Join Date: Feb 2006
Location: Ilkeston, Derbyshire, UK.
Posts: 1,397
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Re: Old and new strip light sizes
Thanks for the replies. The LED striplight is just what I had to hand (purchased when they were on clearance at 50p each in Morrisons some months ago!) It does measure 284mm- it's the older lamp that is slightly longer. I think I'll find myself a proper filament strip lamp and see how it compares. If there is still a size difference I think I'll go down the route of elongating the mounting holes for one of the end holders to give a bit of leeway, as suggested by Herald 13/60.
I've never come across this problem before, so I was interested to see if anyone else had. I'll return to this when I've got hold of another lamp.... Steve |
1st Mar 2020, 9:00 pm | #11 |
Dekatron
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
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Re: Old and new strip light sizes
Re #9, my understanding is that the threaded portion of the ES lamp base used in the US is shorter by one turn than that of the European ES base. Possibly the lamp had a US spec base.
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1st Mar 2020, 9:32 pm | #12 |
Heptode
Join Date: Jan 2009
Location: West Lothian, UK.
Posts: 760
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Re: Old and new strip light sizes
I was playing with an old (filament) striplight today so just measured the lamp = 284mm.
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George |
2nd Mar 2020, 11:39 am | #13 |
Dekatron
Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,528
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Re: Old and new strip light sizes
284mm sounds rather like 11" plus a couple of solder blobs
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2nd Mar 2020, 12:58 pm | #14 |
Octode
Join Date: Jan 2003
Location: Ashby-de-la-Zouch (it's not by the sea)
Posts: 1,254
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Re: Old and new strip light sizes
You know Steve, I've just had a similar problem and gave up with my attempt to use an LED one. I went for a good old-fashioned filament type like this:-
https://www.ebay.co.uk/itm/60w-284mm...IAAOSw5-9c3s9Y Best of luck, Andy
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2nd Mar 2020, 1:03 pm | #15 |
Octode
Join Date: Jan 2003
Location: Ashby-de-la-Zouch (it's not by the sea)
Posts: 1,254
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Re: Old and new strip light sizes
Ah, sorry Steve, wrong end of the stick. So your original is greater than 284mm, not that the replacement was less than 284mm? Mmm...
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7th Mar 2020, 11:59 am | #16 |
Octode
Join Date: Feb 2006
Location: Ilkeston, Derbyshire, UK.
Posts: 1,397
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Re: Old and new strip light sizes
I've now acquired a 284mm traditional filament striplight from the local hardware shop. Out of interest I lined it up with the others so the left-hand end caps are all dead level. If anything it's just fractionally longer than the original. Anyway it fits, which is the important thing!
The photo shops from the top: LED strip lamp New filament strip lamp Original 1960s filament lamp from cooker All of which seems to show that 284mm is not always 284mm. The imperial size by the way is officially 11 1/4". The packet of the new lamp states both sizes. Steve |
7th Mar 2020, 2:37 pm | #17 |
Dekatron
Join Date: Jun 2013
Location: East Sussex, UK.
Posts: 3,315
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Re: Old and new strip light sizes
The fittings I originally had in my old kitchen were 284mm size and both ends were spring loaded as that was how you inserted the lamp by pushing against one of the springs. In one of them fitting became intermittent and I thought it might be short lamp but the cause was a broken spring in one end. Found a spring to do the job.
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7th Mar 2020, 6:37 pm | #18 |
Octode
Join Date: Jan 2003
Location: Ashby-de-la-Zouch (it's not by the sea)
Posts: 1,254
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Re: Old and new strip light sizes
So, is it a case of when is 284mm 284mm then? So much for standards eh. Pleased you sorted it Steve!
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