[Shop-talk] Lamp voltage

[Pat Horne]

Karl, just for grins try replacing all the lamps in one series circuit with ones of the new types & see if they work. It may be that even though the lamps are rated for 3.5v that they are rated for lower current than the original ones, which would cause the new lamps to drop more voltage than the older lamps when mixed. 

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On Nov 27, 2022, at 9:05 PM, Karl Vacek <stearman809 at gmail.com> wrote:


Shop content - as soon as I get the Christmas tree done I can go back to the shop and work on something.

We have many strings of Christmas lights on the tree.  Almost all are 30 year old plus Silvestri 35-light series strings.  Silvestri calls for 3.5 volt replacement bulbs.  Replacement bulbs were getting scarce locally so I ordered some from an Amazon seller, and some from a place that specializes in hard to find items.  They're of two brands, all 3.5 volt for 35-light sets.  Every one I install lights for a second and burns out immediately.  They don't look overly bright as if they were for a lower voltage.  Once burned out the string still stays lit because they have the same jumper as the originals.

What am I missing?

Thanks !
Karl
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