On Feb 3, 2011, at 7:47 AM, Dennis Monticelli wrote:
The LEDs in this product look just like the ones that come in the
XMAS lite strings. That market probably drove mass production and
low prices, which in turn enabled this outfit to build a bulb. It
would probably benefit from a diffuser in some applicatons.
I have not seen the ones you are discussing. I bought mine elsewhere.
The ones that I have bought are not like old fashioned LEDs. The LEDs
themselves seem to be some sort of plstic diffuser, so they radiate
light in almost all directions (the light is blocked by the leads).
They actually radiate more evenly than a real bulb does. In some
cases, I've thought of making a reflector from aluminum foil to focus
the light more.
The bulbs are the LEDs stuck into a base with some circuitry that
allows them to run on the same voltage as the bulbs they replaced did,
and they can run on AC or either polarity DC.
They function in series and the #47 replacements work with a dropping
resistor designed to run a #47 on 12 volts.
I've also bought 12 volt versions, which work perfectly in radios that
run them directly off of a 12v (13.8v) supply.
I'm not sure if a purist would want them. The white ones are too blue
to match a #47 exactly. On my SPR-4, it does not matter, the one bulb
which is unfiltered shows up fine, and the other two which are blue
filtered I replaced with blue ones anyway. It may not look like Drake
intended, but the look is IMHO "good".
Geoff.
--
Geoffrey S. Mendelson, N3OWJ/4X1GM
Those who cannot remember the past are condemned to misquote it.
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
