Hi Mike Monett
You wrote
> It sounds like the generator has a series resistor, but it's not
> apparent what value is. The above numbers looked a bit strange, so I
> tried to calculate it.
>The first run of 6 hrs produced 24.5V and 3.24mA. The series
> resistance calculates to:
R = E / I
= (90 - 24.5) / 3.24e-3
= 20,216 ohms
I am the guy that sent those samples to Ole Bob. The circuit I used is
very much like the one you described, but when I designed it my primary
concern was safety. I wanted to design a line rectified generator that was
almost shock proof, so this is what I came up with.
In the AC line I put a 3k ohm resister in both sides of the line before the
bridge diodes, this limits the short circuit bridge current to 19ma. After
the bridge is a 22 mfd capacitor with a 10k ohm resistor in both the
positive and negative lines. ( which agrees with your calculation of 20,216
ohms) The purpose here is for greater shock protection in case of polarity
reversal. After the current limiting resisters I added a 220k bleeder
resister from hot to negative. An LED then connects to the anode rod. The
220k resister resister will reduce the open line voltage from 160 volts to
135 volts and will discharge the capacitor when unit is turned off. This
resister can be any value between 10k and 220k or higher allowing you to
change the open circuit output voltage to any level you choose. A 15k ohm
resister will have open circuit voltage of 55 volts and a much lower shock
hazard making it very safe to use.
I was intrigued by Bob's idea of increasing the anode rod length and
decreasing the cathode, so this is what I tried.
67" of 12 ga wire wound into a 3 inch coil ( 5 turns) In the center of the
coil I placed a .038 ga. 11/2"
this is a 67 to 1 ratio of surface area.
The question is what generated the NO and NO3?
Was it the high voltage, the coil arrangement,or both.
Bob seems to think it is the voltage. I have produced more samples done at
lower voltages and will be sending them to Bob shortly for testing.
I apologize for not responding to earlier comments on this, but a neck
injury gives me a lot of pain at times and has caused me to severely limit
my computer time the last two months.
Dave Sawatzky
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