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Sanyo Dynapower generator

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Sanyo Dynapower generator

Old 11-05-04, 07:11 PM
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mswantak
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Sanyo Dynapower generator

Anybody have any knowledge or experience on these? I've got a Sanyo bottle dyno, and it's on a par with Union dynos, but I don't know anything about these. They're designed to mount on the chainstay bridge.

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Old 11-05-04, 07:53 PM
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Originally Posted by mswantak
Anybody have any knowledge or experience on these? I've got a Sanyo bottle dyno, and it's on a par with Union dynos, but I don't know anything about these. They're designed to mount on the chainstay bridge.

These are very cool and functional. As far as I know, they are no longer made.
Since they run off the top of the tire, there is very little wear on the tire, and the drag seems minimal compared to a sidewall setup.

I used to have to train after work at night, and I have put many thousands of miles on them. They do hold up well and provide enough power for a nice beam.

The hot generator setup now is the Schmidt Hub generator. If you like generators, you have to get one.
 
Old 11-06-04, 03:28 PM
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When the Sanyo generators came out in the late 70's, it was quite simple to blow the light bulbs if you went too fast. I ended up putting a little limiter in mine and the burnt out bulbs stopped. They are fantastic generators in all but wet or winter conditions (unfortunately two conditions where their use is most commonly needed). They make the removal of therear wheel somewhat more difficult with horizontal dropouts.
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Old 11-09-04, 07:23 PM
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Sanyo got their start in the bicycle dynamo manufacturing business, later on they became the consumer electronics giant we know them as today...
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Old 11-09-04, 08:17 PM
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Looks just like the Soubitez Frenchy that is on my Specialized touring bike.
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Old 11-13-04, 05:55 AM
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I used one quite a bit in the 80's. Drag was acceptable but it slipped a fair amount in the rain. Quite a well made product.

A better choice in San Leandro than Scotland;-(
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Old 11-18-04, 10:59 PM
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Originally Posted by Flaneur
I used one quite a bit in the 80's. Drag was acceptable but it slipped a fair amount in the rain. Quite a well made product.

A better choice in San Leandro than Scotland;-(
The solution to the slip problem was to zip tie a piece of rubber(inner tube) around the drive wheel. Also reduced noise a bit and reduced wear on the tire.
 
Old 11-26-04, 05:40 PM
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yeah, mine had the drive wheel mod............

amongst the many things that were different back then (stuff was cheaper, better value, waistlines were smaller, cadences were up), I remember it rained more:-)

The Sanyo slipped more on slicker tyres as well- hardly a surprise?
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Old 05-04-06, 04:30 PM
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OK, I know this is a very old thread... but... I loved my Sanyo Dyno Generator... I had two at one point, then started canabalizing one to keep the other alive. The failure item in both eventually was the mechanical "switch" that flipped the wide generator hub onto the wheel.

The pivot points eventually wore out.

Too bad Sanyo is not making these anymore.

I really don't want to go the route of replacing my front Phil Hub with a dyno hub. So if anybody knows of a similar "Wheel Top" Generator... speak up.

Seems to me combining these things with some good LEDs might yield a great back up lighting system... very robust and always available (as the LEDs won't die from vibration either).

I still prefer to use a bottle battery lighting system as the primary, but a good secondary is great for those other times.
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Old 05-05-06, 07:33 AM
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I was also looking around for those Sanyo generators. I had one back on my first touring bike, a Univega, in the late 80's. It always worked so well with so little drag. I found a few old ones on E-bay, but they looked really bad so I passed. I also wish there was someone who made the tread driven generators. I don't want to go through the bother of either having a hub-generator built into a wheel or purchasing a wheel that comes with a hub-gen.
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Old 05-05-06, 09:00 AM
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After monkeying around with that Dynapower for awhile I came to the conclusion that while it was head and shoulders above any other Asian-built dynamo, it was still inferior overall to my Union bottle dynos, and I sold it along with a bike I'd installed it on. It made about the same amount of power, but the absence of a regulator made it a lot less convenient in everyday use. The Unions light up full tilt at 4 mph -- a brisk walking pace -- and the intensity never varies from there to as fast as you can pedal. Beyond that the headlamp that comes with the Dynapower looks like it should be good, but isn't; the faceting of the lens produces a weak horizontal pattern combined with a bright vertical pattern that's too narrow to be of much use.
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Old 05-05-06, 01:02 PM
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Plenty of 'bottle' dynos on the market to chose from, but they are easier to find in Europe than in the US. Call around. Union has bought up many of the old European manufactures like Soubitez, and still makes lots of inexpensive models. Busch & Muller (B&M) and Lightspin make higher end models. Peter White and Yellow jersey sell dyno units over the internet.

http://www.yellowjersey.org/litespin.html
http://www.peterwhitecycles.com/lightingsystems.htm
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Old 05-05-06, 02:15 PM
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Forget the bottle dynamos... Either the horizontal version like the Sanyo or Dynohub... I guess I'll have to break down and go Dynohub for my commuter/tourer.
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Old 05-05-06, 02:24 PM
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The Lightspins are state-of-the-art low-drag bottles. Union still makes a bottom bracket dyno, also.
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Old 06-06-07, 07:18 PM
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Sanyo Dynapower

Originally Posted by mswantak
Anybody have any knowledge or experience on these? I've got a Sanyo bottle dyno, and it's on a par with Union dynos, but I don't know anything about these. They're designed to mount on the chainstay bridge.


I used Sanyo Dynapower generators on two bikes for years. Pros: quietness, smoothness, low drag, running on center of tire. Cons: slippage, vulnerability to gunk thrown by tire, increased difficulty of wheel installation/removal. I wrapped traction tape around the roller to improve performance. In case anyone is interested, I have a complete never-used set with headlight, taillight, brackets, wires, and instructions.
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Old 06-06-07, 07:40 PM
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and in case pedalin 1 has sold his (or there's a cheapskate amongst us ) I have a used Sanyo bottle generator with head and tail light, wires...used and unknown condition cause I pulled it off a bike I was flipping. PM me if interested, it will be cheap, like "make offer" cheap.
Edit, just looked again and it's not a Sanyo after all, but TWO bottle generators: one Mitsuba and one Ah Lin(?), plus Union (German) headlamp and tail-lamp with wires and brackets...dirty, everthing needs cleaning...price is now even lower-than-low!

Last edited by unworthy1; 06-07-07 at 10:12 AM.
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Old 06-06-07, 07:58 PM
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Originally Posted by randya
The Lightspins are state-of-the-art low-drag bottles.
Supposedly less drag than a Schmidt hub.
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Old 06-06-07, 09:38 PM
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I finally got wise and swapped the generators for rechargeable sealed lead-acid 6V batteries. They're about the size of three packs of cigarettes and they tuck neatly into my toolbags. Now I don't become invisible at intersections, and the battery pumps out a lot more wattage, so my krypton bulbs really light up.

Definitely less drag than a Schmidt hub, too.
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Old 06-07-07, 02:34 AM
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Originally Posted by mswantak
Anybody have any knowledge or experience on these? I've got a Sanyo bottle dyno, and it's on a par with Union dynos, but I don't know anything about these. They're designed to mount on the chainstay bridge.

They were stock on the Giant City/Utility bikes in the 80's I have one now, it is a good dependable generator, never had a problem with it. Mine is mounted on kickstand bracket and has a lever with a cable to control it. You can turn it off and on while riding.

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Old 05-19-13, 09:54 AM
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Okay, I know this thread is old old old, but I figure it's better to bump it up than start a new one, eh?

I have three of these puppies. All sick.

First one, I got it in 1982 and used it for several years, thought it was pretty snazzy. Took it out of retirement about ten years ago and it was still great. For one mile. Then it started whining so loud I turned it off and rode in the dark. I ordered a dynamo hub and put the sanyo back in the parts bin.

But recently I got a nice early seventies Fuji and wanted this kind of dynamo on it. The front hub is too pretty to replace (). Knowing my old Sanyo was no good I mooched one from a friend who had had it almost as long. I built some nice unobtrusive LED lights, wired it up, and... . Oh. This one made the same intolerable whining noise as my old one. Not acceptable.

Then I found a NOS one on eBay. Psyche! Buy it now, wait a week, install, bliss. Commuted with it for a month, very happy with the silence and the light. But yesterday at mile 65 of a rather wet century, sanyo#3 started complaining almost as bad as the others. Wtf?

My best guess is that the bearings were not lubed with grease that would last 25 years, or they were not sealed properly. But what do I know.

Has anyone ever taken one of these apart? Replaced bearings? Other major repairs?

Is anyone still using one of these? Do you think I've just had bad luck, or maybe my LED lights just draw to much power from the dynamo? Could that hurt the dynamo anyway?
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Old 05-19-13, 09:59 AM
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I think you have the perfect platform to experiment. Take #1 apart and inspect, even if it means destroying it in the process. Apply lessons learned from #1 to #2, which, most likely won't entirely solve the problem. Apply lessons learned from #s 1 and 2 to #3. You're sure to get close to the solution by that point!
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Old 05-19-13, 10:16 AM
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Yeah, but somehow I suspect all this will achieve will be moving the dynamos from the "can be fixed" box to the "can't be fixed"box. Progress of a dubious nature at best.
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Old 05-19-13, 06:13 PM
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My two from 1989 are still working, I think one may have a bad winding as it causes more light pulsing than the other one. One has a lot of use on it, but it still seems to work fine, haven't ridden either one recently.

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Old 05-19-13, 08:02 PM
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I don't have the Sanyo, but when my Soubitez BB dynamo started making noise I flushed it with Tri-Flo and it quieted down. That was several years ago now.
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