Franc Zabkar wrote:

On Sun, 16 Nov 2008 12:17:08 -0500, Jeff Wisnia
put finger to keyboard and
composed:


Taking another closer look at the schematic in that link you gave me
shows the "arrow half" of the symbol for that diode, but it was very
easy for me to overlook. (And perhaps you too, since you thought I'd
need a 24 volt bulb. G)

Jeff


Yes, I missed it. But even if I had seen it, I would have still needed
to be told that it was a diode.

- Franc Zabkar


But, I think I may have grabbed a bulb from the kid's model RR junkbox
that had a higher voltage rating than the 12-14 volts I thought it had.

Mentioning the successful repair to someone else got me a response that
running a 120 volt bulb off of 240 vac in series with a rectifier is NOT
equivalent to running it off of 120 vac without the rectifier and the
bulb will blow out rather quickly, because its filament is overvoltaged
quite a bit of the time.

I've got to think that one out a few more times before I'm ready to say
yes or no to it. Perhaps someone reading this post can pouint me to a
cite on the subject.

Jeff


--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.