Gabriel's SS SSG

[gabiX87]

Hi guys,

so this is my SolidState SG








wire lenght is the recommended lenght of the wheel version
AWG ?!
7x MJL21994
100ohm resistor on the base of each MJL
1N4007 diodes

converted to CPD (cap+pot+diode)
In my case I changed the potentiometer to fixed resistors in series because I was running tests with higher uF caps which were killing my small pots.

I used two 12V 7Ah batteries. Both batteries capacity was measured with CBA IV. Input battery was fully charged with RC1-AU and the output was dischgarged to 10.50V with CBA IV. I ran the test for 3 hours or the input V dropped to 12.06V (50%). Then I discharged the output with CBA to measure how much charged. I measured the input mA with digital multimeter , there might be slight deviation when the DMM was and was not in the circuit.

1. TEST
runtime 3hours
1x 330uF e.l. cap
300Ohm 5W resistance across the cap (100+100+100)
input ~600(650)mA

after 180mins
input battery - 12.05
output battery - 12.42 after 50min rest 12.01

measured capacity - 1.74Ah

2. TEST
1x 470uF 50V e.l.cap
300Ohm 5W resistance across the cap (100+100+100)
input ~600mA

after 180mins
input battery - 12.06V
output battery - 12.44V after 1+hours rest 11,94V

measured capacity - 1.64Ah

3. TEST
2x 470uF 50V (940uF total) e.l. caps
300Ohm 5W resistance across the cap (100+100+100)
input ~600mA

after 180mins
input batt 12.09V
output batt 12.39V after 1+hours REST 11.85V

measured capacity - 1.43Ah


The higher the input current the bigger the pulse/spike. With bigger pulse you can charge bigger batteries or really push small ones. There also comes the speed or frequency of the pulses. At 1.5A (2200uF) the 7Ah batt went above 14V very quickly while boiling the electrolyte. WIth 600mA input there was no boiling but slowly climbing Voltage on the output i.e. the battery could absorb the pulse without boiling itself (wasting the energy). Every battery has it's pace or speed of charging.

If I pulled the iron core out it stopped working correctly. I was listening to the pops on the standard battery operated AM radio.

Any comments or suggestions appreciated.

[D Rhodes]

Hi Gabriel, I think the pictures did not load properly? Also I would not discharge the batteries down to 10.50 volts...you may damage them. 12volts would be safer. Maybe someone else would say differently? And for a 7 transistor coil I would think that 7ah batteries are too small. Maybe 30aH would be better.
The C20(safe limit) rate of charge and discharge for 7aH batteries = 7Ah/ C20 = 350mA load for 20 hours
So even putting in 600mA is too high for such a small battery to safely handle.
You do not want to charge with current but with radiant. Otherwise we may as well use a conventional charger.
7aH batts are more suited to a coil with only 2 wires at 120feet...not a beast with 8 wires.
Blessings

[gabiX87]

Also I would not discharge the batteries down to 10.50 volts...you may damage them. 12volts would be safer. Maybe someone else would say differently?

Yes I know. But the fact is I have done this many many times rejuvenating batteries , discharging them to 10.50 as long as I charged them back with a TeslaCharger. Even the CBA software suggest the cut-off voltage at 10.50V



The C20(safe limit) rate of charge and discharge for 7aH batteries = 7Ah/ C20 = 350mA load for 20 hours

Yes I know. I was tunning and testing the circuit. C20 wasn't a concern at this time.

So even putting in 600mA is too high for such a small battery to safely handle.
I don't understand. You mean on the charge battery ? Where do you see 600mA to the output battery ? Please double-check. I do not have a scope to measure the output spike. So that data is missing. Radiant is basicly the 'spike' aka 'high voltage transient' is it not the same on the solid state ?

[skyisblue]

Hi guys,

so this is my SolidState SG
[ATTACH=CONFIG]5530[/ATTACH]

[ATTACH=CONFIG]5531[/ATTACH]

[ATTACH=CONFIG]5532[/ATTACH]

[ATTACH=CONFIG]5533[/ATTACH]

wire lenght is the recommended lenght of the wheel version
AWG ?!
7x MJL21994
100ohm resistor on the base of each MJL
1N4007 diodes

converted to CPD (cap+pot+diode)
In my case I changed the potentiometer to fixed resistors in series because I was running tests with higher uF caps which were killing my small pots.

I used two 12V 7Ah batteries. Both batteries capacity was measured with CBA IV. Input battery was fully charged with RC1-AU and the output was dischgarged to 10.50V with CBA IV. I ran the test for 3 hours or the input V dropped to 12.06V (50%). Then I discharged the output with CBA to measure how much charged. I measured the input mA with digital multimeter , there might be slight deviation when the DMM was and was not in the circuit.

1. TEST
runtime 3hours
1x 330uF e.l. cap
300Ohm 5W resistance across the cap (100+100+100)
input ~600(650)mA

after 180mins
input battery - 12.05
output battery - 12.42 after 50min rest 12.01

measured capacity - 1.74Ah

2. TEST
1x 470uF 50V e.l.cap
300Ohm 5W resistance across the cap (100+100+100)
input ~600mA

after 180mins
input battery - 12.06V
output battery - 12.44V after 1+hours rest 11,94V

measured capacity - 1.64Ah

3. TEST
2x 470uF 50V (940uF total) e.l. caps
300Ohm 5W resistance across the cap (100+100+100)
input ~600mA

after 180mins
input batt 12.09V
output batt 12.39V after 1+hours REST 11.85V

measured capacity - 1.43Ah


The higher the input current the bigger the pulse/spike. With bigger pulse you can charge bigger batteries or really push small ones. There also comes the speed or frequency of the pulses. At 1.5A (2200uF) the 7Ah batt went above 14V very quickly while boiling the electrolyte. WIth 600mA input there was no boiling but slowly climbing Voltage on the output i.e. the battery could absorb the pulse without boiling itself (wasting the energy). Every battery has it's pace or speed of charging.

If I pulled the iron core out it stopped working correctly. I was listening to the pops on the standard battery operated AM radio.

Any comments or suggestions appreciated.

nice. its really appreciating. I would like to have a try on this too

[Beth641]

Also I would not discharge the batteries down to 10.50 volts...you may damage them. 12volts would be safer. Maybe someone else would say differently?

Yes I know. But the fact is I have done this many many times rejuvenating batteries , discharging them to 10.50 as long as I charged them back with a TeslaCharger. Even the CBA software suggest the cut-off voltage at 10.50V

[ATTACH=CONFIG]5529[/ATTACH]

The C20(safe limit) rate of charge and discharge for 7aH batteries = 7Ah/ C20 = 350mA load for 20 hours

Yes I know. I was tunning and testing the circuit. C20 wasn't a concern at this time.

So even putting in 600mA is too high for such a small battery to safely handle.
I don't understand. You mean on the charge battery ? Where do you see 600mA to the output battery ? Please double-check. I do not have a scope to measure the output spike. So that data is missing. Radiant is basicly the 'spike' aka 'high voltage transient' is it not the same on the solid state ?

impressive.. what you do with the data missing exactly??

[gabiX87]

impressive.. what you do with the data missing exactly??

I meant that I do not have a osciloscope to measure , actually see , the frequency and voltage of the spike with different setups (caps,pots or resistors).

[Beth641]

I meant that I do not have a osciloscope to measure , actually see , the frequency and voltage of the spike with different setups (caps,pots or resistors).

ok.. thanks for help

[janessa642]

nice thread.. thanks for posting here..