On 5/4/2018 2:04 PM, bob prohaska wrote:
Frank Krygowski wrote:
On 5/4/2018 12:06 AM, bob prohaska wrote:
I'm curious, what make of dynamo got hot at 10 mph?
The glued-on label has faded out completely. Plain, drawn aluminum
case, steel mouting bracket. It's more slender than the Anlun in the
SJS link below and has a metal roller, with a single push-clip terminal.
I can post a photo if it's of interest.
I have ancient Union bottles on two bikes. I don't recall them ever
getting beyond very slightly warm - I'd guess maybe 90 degrees Fahrenheit.
This place has bottle dynamos:
https://www.sjscycles.co.uk/dynamos-bottle/
I've bought other stuff from them. Price and shipping speed seem very
competitive with American sources, and selection tends to be much better.
Now that I have the hub dynamo there's little incentive to go back, but
that is a link I didn't know about.
This place has been a good source for bulbs of all kinds:
http://www.reflectalite.com/
They also have LEDs that are drop-in replacements for halogen dyno
bulbs. I bought one for a friend and have another in a headlamp that
I've only bench tested in my basement. It seems very good, but I haven't
tried it on the road. It's not yet needed on any of my bikes.
That is a most interesting site, I can think of a couple reasons to
explore it further. Still, it's uncertain how well optics designed
for filaments will match to LEDs' larger source size. Also, it looks
as if the drop-in dynamo bulb replacements are only 1 W, leaving 2 W
or so excess get rid of. Odd they don't offer a 2.4 or 3 W version.
I kept the packaging on the one I bought, and just checked the notes I
wrote in it. Yes, it's labeled 1 Watt, but it gave much more light than
the halogen 2.4 Watt bulb. I wrote that the focus was not as precise,
with much more spread, but ISTR thinking it was pretty good. I never
mounted it on a bike, but I tested it by shining it down my driveway.
I figure it's of most use to people wanting to keep old bikes
period-correct, more or less.
--
- Frank Krygowski