The local church that I attend have asked me to try and find a bulb supplier
in the UK preferably, who can supply some 120V 7.5W (7 point 5 W) Screw-In
bulbs which are used to illuminate the foot pedal keys on the Allen organ.
I have looked at that many websites, I feel that I am going dizzy.
Could anyone possibly help with some information lease ?
With kindest regards,
PS some other options when you have established what ES fixing it is:
1. Some low energy LED bulbs have an input rating which is very wide,
covering US and european voltages. These tend to give a whiter light but
might be an option if space permits and you can find the correct rating to
give the light output of the normal bulb. Maybe 2W in this case.
2. You'll probably find some seller on ebay.com willing to ship to the UK
(but be very careful of shipping prices). A quick search on "7.5w light
bulb" turned up:
These are $1ea + $6 postage even if you get more than one. Doesn't seem bad
3. Dropping down to say 5W might still be enough light for the purpose and
will probably give you a wider range of suppliers?
Does the church have a maintenance contract for the organ? If so, you
should be able to get failed bulbs replaced under that.
Otherwise, have you contacted the Allen Organ people?
They claim to keep spare parts for all Allen organs made since 1937.
Failing that, you may be able to re-wire the lights to connect to the
incoming mains rather than to the 120v transformer, and then use 240v bulbs.
[Since the organs are made in the USA, everything is designed round
110/120v, and they use a step-down transformer for Europe. The church I
used to attend has one - which I was instrumental (sorry!) in acquiring
for them, and the transformer causes fun and games at PAT testing time
because it's connected straight across the mains even when the main
switch on the console is off!]
I see you haven't got much help yet.
What's the diameter of the thread on the bulbs concerned? 7.5w
suggests candelabra base (12mm) lamps, often used to illuminate the
translucent base of table lamps in the US. Give us an idea of the
overall shape and dimensions and the base dimensions. If my guess is
right, then if you've any problems ordering from the USA, an E11 base
with a 230 volt 15 watt rating will probably fit OK and be available
here and give the same sort of illumination level. Also last forever
at that sort of downrating.
R varies over a ratio of 8:1 for typical filament bulbs. But more
important is the filament temperature. When one is underrun, filament
temp falls, and efficacy plummets fast & hard. The result would be
more a glow.
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