Update: it’s the light. 

The mechanic who installed the dyno system on my Clem  for me last year was 
working today, and he handled my Platy. He investigated  the whole system, 
ensured that all the wires and connections were correct and sturdy. The rear 
tail light does light up, so it seems unlikely the hub is the issue. He feels 
like the issue is originating in the headlight. Like there’s a short in it or a 
loose connection. He fiddled around with the switch and was able to get the 
headlight to come on in the stand. This is exactly what happened for 
yesterday‘s mechanic. When I picked the bike up and spun the wheel myself, the 
headlight did not light up.

I’m going to see if Schmidt will make this right. If not, I guess I’m just 
ordering another headlight. I can’t exactly go without one.

Sent from my iPhone

> On Apr 29, 2021, at 12:44 PM, masmojo <masm...@sbcglobal.net> wrote:
> 
> I'll weigh in a on a few things
> Yes, Contacts on the right (drive) side. 
> Notchiness?  It's just an element of the way the magnets work, it will be 
> worse when the light is on and when they bike is in the air. Once the bike is 
> on the ground with weight on it; it will be imperceptible.
> Dynamo hubs will loosen up a small amount over the first months of use, but 
> it's hardly noticeable and likely no more than regular hubs.
> Funny noise could be an element of having it mounted backwards (?) (just a 
> guess)
> JMHO, but I am also somewhat loath to trim the stock dynamo cables, It's easy 
> to shorten them, but more difficult to make them longer.  Typically when 
> joining dynamo wires I head down to the local hobby shop and get mini R/C 
> connectors. this makes connecting and disconnecting a darn site easier and 
> also cutting/soldering.
> Important to note: that some lights are DC and some are AC, shouldn't really 
> be an issue especially if the Tail light is the same brand as the front 
> light. I don't remember which brand is which, but I think typically there's a 
> circuit in the light that does the conversion.
> I like the SON hubs, but I have to say I prefer the Plastic quick connect 
> plugs over the small insulated connectors the SON uses, the SON  are really 
> fiddley!
> Also note that some lights won't switch on unless you turn them on while the 
> wheel is moving; I haven't had a big problem with this, because I leave mine 
> on all the time!
> 
> FWIW, I have a SON hub and Edelux light that I bought in a package deal of 
> ebay, Hub seems fine, but I mounted the light up on my Evasion and the light 
> (like yours), doesn't seem very bright.  (may be why the original owner sold 
> them) I haven't really done much towards figuring out why, but it is 
> interesting that you've had a similar experience.  Since I am currently not 
> working, I mainly ride in the daylight, so the light is  primarily to be seen 
> and it does that suitably well. Once Covid is over though I think I'll get a 
> Supernova from Germany!!! Not really better, but I just prefer the design and 
> the way they mount.
> 
>>> 
> 
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