Rectifier/Regulator replacement list

[Matchless]

Jim,
Thanks for that peep into the use of FET's I am sure that the info will be of good use to those of us that like to know why and how its made!
Much appreciated.

[posplayr]

I found a FH012 Spec Sheet

Since someone seems to have put their mind to
doing a better design with the Shindengen FH012AA , I'm hoping they also improved on the regulation as well.

a.) There should be some improvement in the low RPM voltage in that the output voltage should be a little higher because one of the bridge diode drops has been replaced with the FET drop (the lower end of the rectifier bridge). From the spec sheet below we see that the Vf for the diode is 0.77 V max and the FET drop Vron is only 0.44V max. So there might be as much as a 0.3V improvement at idle (instead of the GS idling with 12.8 V add 0.3 and you have 13.1V )

b.) The regulation is probably designed to have a tighter control and not exhibit as much increase in output voltage for increase in RPM. The spec calls for 14.5 +/-0.3 output voltage under regulation. Any variation is likely due to temperature sensitivity of the internal voltage reference and not loose regulation as a function of RPM.

http://www.shindengen.com/resources/Product/FH012AA.pdf

All in all I think this is worth giving and try and will pull alot of the slop out of the GS charging.

Notice also that the installation diagram says to mount the R/R directly across the battery with the load further away and a maximum of 1.5 meters of total harness length between the + and - on the R/R. For a remotely located R/R that is 0.75 m max or about 30 inches away.


I just added up the combined max current consumption using the manual for a GS1100EZ and I get 195 watts at lets assume 14V which is just under 14 amps. Looking at the Power derating curve, the FH012 should handle that nicely even with no air flow all the way to 80 deg C (176 degF)

Pos

[Matchless]

Man, all this electrical talk is WAY over my head. I'll need to go get my Dad to translate.


Quick question: how are we supposed to find or test the capacity of a particular unit?

Brian,
I was hoping someone has some technical information such as a manual for a bike that mentions a specific model number of a regulator and gives the current rating. Those I have entered are a few that I could find.

The physical size of the unit is not a reliable indicator as the latest ones have a very small form factor while retaining a high current handling capability.

I personally think that some people may have had repeated regulator failures due to unknowingly using a low capacity regulator as a replacement and as it then heats up more than the larger unit, its lifespan is drastically shortened.

[Matchless]

Kawasaki ZX9

Here is Kawasaki's method of using the 6 wire regulator. This also gives you the wire colours in case you want to use one.

[Matchless]

Does anyone think it is worthwhile keeping this list up to date? I will gladly keep doing it if it is usefull to some.
I am asking due to little response and its slowly slipping into obscurity, maybe its done its job and can be put on pension now?

[82Shafty]

I got a stiffy from reading all of the different possibilities and how well the new FJR units are designed.

Rock on!

[four_shot]

I suggest this thread be posted as a sticky er something.....good stuff here.

[Nessism]

I picked up one of those FH012 units off ebay ($25 shipped) but haven't installed it yet. My 850 has a five wire CRB R/R and it works great.

The FH012 has some odd shaped plugs so I think individual spayed connectors are the only reasonable solution. Not sure how to seal these off to water though. At any rate, I can't see purchasing some 25+ year old Honda R/R when late model versions are so cheap (this is my logic since all this electrical talk is over my head).

[Matchless]

I picked up one of those FH012 units off ebay ($25 shipped) but haven't installed it yet. My 850 has a five wire CRB R/R and it works great.

The FH012 has some odd shaped plugs so I think individual spayed connectors are the only reasonable solution. Not sure how to seal these off to water though. At any rate, I can't see purchasing some 25+ year old Honda R/R when late model versions are so cheap (this is my logic since all this electrical talk is over my head).

You have it spot on. I think that is the best regulator available now! Just fit those individual tails as you suggested and seal the whole socket cavity with silicon rubber sealer or solder them on.

[Nessism]

You have it spot on. I think that is the best regulator available now! Just fit those individual tails as you suggested and seal the whole socket cavity with silicon rubber sealer or solder them on.

Silicone in the cavity is a good suggestion. Thanks.

[posplayr]

FH012 units

Ed,
If you get to it before me, please post some of your voltage readings v.s. RPM (e.g. idle, 2000, 3000,4000,5000). I suspect it is better than the typical GS voltages. Specifically the idle voltage will be above 13V (v.s. 12.6 for GS) and the FH012 will have better (fixed) regulation to 14V by the time you get to 2000 RPM.

I have one of the FH012 units as well and may get to that today on my GS1100ED. Doing some home work right now (3 classes). A while back I confirmed most of the theory I previously posted with one of the electrical engineers at work. Bottom line is that a FET based design can be made almost 100% efficient assuming the proper control switching is put in place. It is the control switching in the small package that makes this new performance attainable. We are talking mid 90's technology v.s. late 60's technology a full 30 year leap forward LOL.


Pos

[gus33]

I'm very interested in upgrading the rectifier and regulator in my 78 GS1000. On this model they were seperate units, however. Is there a reason why a sinle R/R unit like the Shindengen FH012 can't be used as an upgrade?

[KiwiGS]

I'm very interested in upgrading the rectifier and regulator in my 78 GS1000. On this model they were seperate units, however. Is there a reason why a sinle R/R unit like the Shindengen FH012 can't be used as an upgrade?

None at all
Cheers

[rustybronco]

I picked up one of those FH012 units off ebay ($25 shipped) but haven't installed it yet.

I might have to get and fit one of the FH012AA units myself.

[erock]

Wow..25bux shipped is alot cheaper than the 100 bucks I just spent for an r/r for my 85 gs550e from electrosport......I bought one of their stators too. Would an FH012AA work on my bike??? Please forgive me if its a dumb question......this is my first bike. Mebbe I'll get one to throw in the back pack fer just incase........