I thought I would create a new post for this little task since it was kind of a fun. My 1959 VBA speedometer did not have a light bulb. It just had this empty slot and I had no idea how the original bulb was mounted.
I really couldn't use any of the pieces from Voodoo's speedometer, but it did give me some ideas on lighting my own. A bit of searching showed that these bulbs had an E5 base (5mm) and I found some E5 bulb holders and E5 base 6V bulbs. A scrap of sheet metal, a drill, tin snips, needle nose pliers, length of wire, soldering iron and 30 minutes later, I had a replacement bulb holder for my clamshell speedo.
Be aware of two bulbs overheating and melting something. One is probably enough. It looks a bit to bright to me. Piaggio always had good reasons for what they designed.
Yeah, good point about the heat. Two bulbs definitely work better as it spreads out the light better. According the VBA owners manual, the original speedo bulb is supposd to be 0.6W. The bulbs I'm using are 1.2W each and I've got some 0.24W bulbs to try. Also, these bulb holders came with LED bulbs, but they're 12-14V so they're a little dim at 6v. I'll play around with this to see whats the best combo of heat and light. The best part of having actual bulb bases is that I can easily swap out the bulbs.
Last edited by flyngti on Thu Nov 19, 2020 1:04 pm; edited 1 time in total
Instead of two bulbs, you may be able to fit in a layer of something to diffuse the light to reduce or eliminate hotspots. Depending on heat, some typing paper or rice paper might do the job. Maybe a thin sheet of frosted acrylic.
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