Lighting burnout

[Peter Signorini]

After my recent ride my light set has stopped operating. It's a nice Busch &
Muller S6 dynamo with their Lumotec headlight, and is very efficient and low
friction.

After renewing a slightly dodgy lead and checking the bulb it still didn't
run. After putting a simple current tester onto it I seem to have no output
from the dynamo. So now I guess I have to find out about any warranty from
the LBS.

I used it on the descent of Mt Donna Buang - surely 16 kms at 45-55 kmh is
OK with the dynamo on? It was cloudy and poor visibilty near the summit, but
maybe I should have flicked the dynamo off part way down. The dynamo bottle
is fastened with grub srews so could be pulled apart.

Does anybody here have experience with repairing these units? Could the
dynamo have been burned out by a high speed run?

For the cost of these units I don't want to have to replace it, so any
advice on the problem or repairs will be greatly appreciated. TIA

Cheers
Peter

 

[Ray Peace]

Good Morning Mr Sig,
You appear to have overlooked the
elementary. Pay a visit to your nearest **** Smith or whatever and buy a
pair of six volt zena diodes. Get a soldering iron and wire these into
your lighting system to restrict the dynamo output. The answer is you
probably have burned out something on the dynamo, probably not the main
coils as they are pretty tough, but if you ran the unit at 55 k/mh for
16 km, it was producing 8-9 volts all the way, and wouldn't like it. My
ancient Sanyo Dynapower is still running, but then I don't ride down
Donna Buang at night!
Regards,
Ray.

Peter Signorini wrote:

>After my recent ride my light set has stopped operating. It's a nice Busch &
>Muller S6 dynamo with their Lumotec headlight, and is very efficient and low
>friction.
>
>After renewing a slightly dodgy lead and checking the bulb it still didn't
>run. After putting a simple current tester onto it I seem to have no output
>from the dynamo. So now I guess I have to find out about any warranty from
>the LBS.
>
>I used it on the descent of Mt Donna Buang - surely 16 kms at 45-55 kmh is
>OK with the dynamo on? It was cloudy and poor visibilty near the summit, but
>maybe I should have flicked the dynamo off part way down. The dynamo bottle
>is fastened with grub srews so could be pulled apart.
>
>Does anybody here have experience with repairing these units? Could the
>dynamo have been burned out by a high speed run?
>
>For the cost of these units I don't want to have to replace it, so any
>advice on the problem or repairs will be greatly appreciated. TIA
>
>Cheers
>Peter
>
>

 

[Marty Wallace]

"Ray Peace" <[email protected]> wrote in message
news:[email protected]...
> Good Morning Mr Sig,
> You appear to have overlooked the
> elementary. Pay a visit to your nearest **** Smith or whatever and buy a
> pair of six volt zena diodes. Get a soldering iron and wire these into
> your lighting system to restrict the dynamo output. The answer is you
> probably have burned out something on the dynamo, probably not the main
> coils as they are pretty tough, but if you ran the unit at 55 k/mh for
> 16 km, it was producing 8-9 volts all the way, and wouldn't like it. My
> ancient Sanyo Dynapower is still running, but then I don't ride down
> Donna Buang at night!
> Regards,
> Ray.

Are you going to tell us how to connect them up?

Marty

>
> Peter Signorini wrote:
>
> >After my recent ride my light set has stopped operating. It's a nice
Busch &
> >Muller S6 dynamo with their Lumotec headlight, and is very efficient and
low
> >friction.
> >
> >After renewing a slightly dodgy lead and checking the bulb it still
didn't
> >run. After putting a simple current tester onto it I seem to have no
output
> >from the dynamo. So now I guess I have to find out about any warranty
from
> >the LBS.
> >
> >I used it on the descent of Mt Donna Buang - surely 16 kms at 45-55 kmh
is
> >OK with the dynamo on? It was cloudy and poor visibilty near the summit,
but
> >maybe I should have flicked the dynamo off part way down. The dynamo
bottle
> >is fastened with grub srews so could be pulled apart.
> >
> >Does anybody here have experience with repairing these units? Could the
> >dynamo have been burned out by a high speed run?
> >
> >For the cost of these units I don't want to have to replace it, so any
> >advice on the problem or repairs will be greatly appreciated. TIA
> >
> >Cheers
> >Peter
> >
> >
>

 

[Peter Signorini]

"Ray Peace" <[email protected]> wrote in message
news:[email protected]...
> Good Morning Mr Sig,
> You appear to have overlooked the
> elementary. Pay a visit to your nearest **** Smith or whatever and buy a
> pair of six volt zena diodes.

Ray, the B&M Lumotec light already has this. The light works OK using a
battery to check it. Hence the dynamo is not putting out any charge and
that's what bothers me.

> Get a soldering iron and wire these into
> your lighting system to restrict the dynamo output. The answer is you
> probably have burned out something on the dynamo, probably not the main
> coils as they are pretty tough, but if you ran the unit at 55 k/mh for
> 16 km, it was producing 8-9 volts all the way, and wouldn't like it.

Have spoken to the shop and they think speed shouldn't harm the dynamo, but
it is under warranty (3 yrs - pretty good) so I'llget them to look it over.

> My ancient Sanyo Dynapower is still running, but then I don't ride down
> Donna Buang at night!

It was daylight, actually a repeat of the infamous Donna Buang Snow Ride.
You remember the 1980 experience. We had snow but generally all rideable.
The descent was cold and gloomy with misty clouds at first, so we put the
lights on to warn cars. Lower down we had rain but with good wet gear I kept
dry and warm. Dave and Mike Kater were with us, both previous snow riders.
Give us a bell sometime about doing some rides.

Cheers
Peter