GSXR steering damper on a GS1000

[posplayr]

thanks again Pos. would a 10w 5ohm resistor be better than a 5w?
i found this one on ebay.........

http://www.ebay.co.uk/itm/2907940225...84.m1423.l2649

You can see here that the power rating is based on mounting to a sheet metal box with dimensions 4" x 6" x 2" x 0.040"(thickness). That is the rating for either the 5W or 10W. This should give you an idea that they are assuming quite a bit of surface area to dissipate the heat. If you put the heat into the lower triple it would be even better.


So unless you mount solidly (using heat sink paste) to something substantial (i.e. don't just float it in the air) these devices will get hot. The derating is from 25 deg C where the device will operate at full rated power down to 0% at 275 degC. So properly mounted at any ambient temp you are going to be no more than 10% derated (i.e. maximum of 4.5 watts for 5W or 9 watts for 10W device)

5 ohms 10W is fine if you don't find the size objectionable.

Dan,
The 6 ohm resistor will actually will run hotter than the 5 ohm. I posted a set of power calculations in a matrix of voltage v.s. resistance . Even though this is counter intuitive it is true. You have to do the calculations to convince your self.

I = V / R_total
R_total = 12.5 + R_ballast + R_switch (use 1 ohm is you like for R_switch)
P_ballast = I^2*R_ballast

Also the switch seems to be dropping quite a bit of voltage (I calculate 1 ohm using Age's values) the 5 ohms is keeping the total current in check along with the switch.

Jim

[Agemax]

ok, i get it now. i have ordered the 10w resistor and i will see how it looks. the trees are a good ground so i will find a spot on the top tree as it would be a bit more inconspicuous.

Thanks guys for helping me out with this

[posplayr]

ok, i get it now. i have ordered the 10w resistor and i will see how it looks. the trees are a good ground so i will find a spot on the top tree as it would be a bit more inconspicuous.

Thanks guys for helping me out with this

dont forget to get some of this or the equivalent.

http://www.radioshack.com/product/index.jsp?productId=2102858

[Agemax]

dont forget to get some of this or the equivalent.

http://www.radioshack.com/product/in...ductId=2102858

i would have forgotten............because i didnt know i needed it!

i have just ordered this, i guess its the same stuff?

http://www.ebay.co.uk/itm/150958841901?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

[posplayr]

i would have forgotten............because i didnt know i needed it!

i have just ordered this, i guess its the same stuff?

http://www.ebay.co.uk/itm/1509588419...84.m1497.l2649

yes that is good. The thermal paste/grease makes sure that there is a full contact thermal bond between the mating surfaces. That allows the entire surface area to conduct heat rather than just the high spots.

If you look at the picture I posted of the stator load tester, there is a hint of white on the upper resistor; that is the grease. I guess I must have wiped the excess away from the lower two so it is not visible.

[Agemax]

damper now black, with polished details and solenoid.

[Agemax]

all fitted, wired up and working lovely now........




and the resistor located here, hardly gets warm at all now.