Date:   4/16/2010 6:34:35 PM ( 14 y ago)
Hits:   20,760
URL:   https://www.curezone.org/forums/fm.asp?i=1607284

That was easy. 2 x 22 Ohm and 1 x 10 Ohm resistors in straight series and when checked with the DMM the combination actually read 53.3 Ohms.

I'm reading a constant 1,288 uA (1.288 mA) across a dead short with the DMM. With my anode at a calculated 1.274 square inches that should be 1.011 mA per square inch of anode. That's close enough to 1.000 mA per square inch in my book.

Now, since my current is not far off from where I started (originally I was at a constant 1 mA), and it has been taking me 16-18 hours to make a batch, I'm wondering if my wall wart (transformer) may be partially to blame. My particular unit measures in at 29.06V DC. Any ideas or suggestions here? I believe that 30V DC is the maximum permissible input voltage for the LM334Z.

I know that the typical inexpensive DC to AC converters that are "half sine wave" units clip away half of the actual current flow. Could it be that a budget AC to DC transformer likewise clips away half of the sine wave from the original AC current, yielding 29.06V DC, but only delivering it every other alternating 1/60th of a second?


 

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