Branch's SSG Build

[Branch Gordon]

Now that I've got my free-spin time nailed down, I have a few questions before I continue:

1. The beginner SG guide says to use R45 rods, however here on the forums it's always been R60. I also noticed that Teslagenx is selling coils with R60 rods. Is this a typo in the guide?

2. Also, in the beginner SG guide, it's suggested to cut the coil wires once the coil is mounted so that they aren't sticking up everywhere around the circuit. However, a lot of emphasis is placed on making sure the wires are exactly 130' long. Doesn't this cut affect the over resistance of the coil?

3. The lawn tractor batteries are recommend for use with the JB 8-filar build. I am building a 5-filar model, with the circuit from Teslagenx.com. Are those size batteries still recommended, or should I go smaller?

Thanks for all the help everyone!

Branch

[Branch Gordon]

Just wanted to bump this up, and see if I could get a response. I know you guys are busy...or this may have been missed. Please see questions above...my circuit board should arrive this week so want to have this nailed down...

Thanks!

Branch

[Tom C]

Now that I've got my free-spin time nailed down, I have a few questions before I continue:

1. The beginner SG guide says to use R45 rods, however here on the forums it's always been R60. I also noticed that Teslagenx is selling coils with R60 rods. Is this a typo in the guide?

2. Also, in the beginner SG guide, it's suggested to cut the coil wires once the coil is mounted so that they aren't sticking up everywhere around the circuit. However, a lot of emphasis is placed on making sure the wires are exactly 130' long. Doesn't this cut affect the over resistance of the coil?

3. The lawn tractor batteries are recommend for use with the JB 8-filar build. I am building a 5-filar model, with the circuit from Teslagenx.com. Are those size batteries still recommended, or should I go smaller?

Thanks for all the help everyone!

Branch

1- they are not much different i have run both with no difference in charging, its more about the cores magnetic properties than the R number
2- not in the amount you are cutting cut them all the same .0001 ohms is not going to affect things
3- the size batteries you have is fine. I run 14 AH worth of batts on mine.

Tom C

[Branch Gordon]

Excellent....thx so much Tom.

1- they are not much different i have run both with no difference in charging, its more about the cores magnetic properties than the R number
2- not in the amount you are cutting cut them all the same .0001 ohms is not going to affect things
3- the size batteries you have is fine. I run 14 AH worth of batts on mine.

Tom C

[Branch Gordon]

Hey everyone! My build is nearing completion. Here's a video update!

www.youtube.com/watch?v=58GvJZqQ3tY

[Branch Gordon]

Update: I've changed the primary and charge battery wires to 12GA wire, and soldered ring terminals so I can screw them onto the battery posts instead of using alligator clips.

[Branch Gordon]

I've started my 1st test run! Some specs:

Frame: Solid oak w/ Brass screws
Wheel: 24" Aluminum. 9:30 free spin time using ceramic bearings.
Circuit: 4 transistor Teslagenx board
Coil: 4 power, 1 trigger. From Teslagenx
Wire to batteries: 12GA with ring terminals

Input draw: 330mA
Output: 170mA
RPM's: Waiting on reflective tape for tachometer

Batteries: Interstate Lawn & Garden type batteries from True Value

[Branch Gordon]

My plan is to discharge the primary battery down to 12V and then stop each test run. If I have the SSG built and tuned correctly, should it charge the battery up to 15.x volts on the 1st test run, or does it take time to condition to taking the charge?

If it takes time, should I recharge the primary, and continue to charge the charging battery until it's full? Or just run a discharge cycle and start over at 12V again?

[Tom C]

My plan is to discharge the primary battery down to 12V and then stop each test run. If I have the SSG built and tuned correctly, should it charge the battery up to 15.x volts on the 1st test run, or does it take time to condition to taking the charge?

If it takes time, should I recharge the primary, and continue to charge the charging battery until it's full? Or just run a discharge cycle and start over at 12V again?

fully charge your primary battery and your charging battery. do a discharge run of both on the CBA to give you a baseline. then fully charge your primary. start your runs with your charge battery. you may need to recharge your primary battery to complete a charge cycle of your charging battery for the first few runs. tune your SG so that the current draw from the primary is at or above C20 you will get to the point where the run battery charges faster than the primary depletes. discharge your battery immediately after you charge it dso not let it rest. Peter and Jon noticed the gains only when running the batteries in this manner. Tom C

[Branch Gordon]

Thanks Tom. So does the tuning procedure of finding the lowest amp draw/highest rpm not apply anymore?

I'm guessing C20 for these batteries is around 650mA...

[Tom C]

Thanks Tom. So does the tuning procedure of finding the lowest amp draw/highest rpm not apply anymore?

I'm guessing C20 for these batteries is around 650mA...

it still applies that is how you find your tuning points non linear increases in RPM.

Tom C

[Branch Gordon]

Right...but in the last post you said to tune to C20 or higher, which isn't necessarily the spot that has the lowest amp draw to RPM speed.

So should I tune to C20 or higher....or to the points that have non-linear increases in RPM?

[Branch Gordon]

Decided to stop my test run and install a new steel rim. 24" steel, ceramic bearings, tri-flow.

Free spin time of 13:15!!

So I'm glad I made the change...

[Branch Gordon]

Ran through all the resistances in increments of 10 ohms and documented RPM's in order to find the sweet spot. Looks like I need a resistance close to 110 ohms.

Does this look correct to everyone?

[Branch Gordon]

I looked up the lawn & garden batteries I am using that I got from True Value. Looks like they are rated at 20AH.

Interstate SP-35 Lawn & Garden Battery 300 CCA

That still gonna be ok?