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The more I run through the various data sheets seems this is a likely suspect.. Only because the circuit pulses the induction coil that produces the high voltage..: )
https://pdf1.alldatasheet.com/datasheet-pdf/view/53478/FAIRCHILD/KSE5742.html
Owl keep looking. I may even try calling Motorola...
My goodness google sure is quick with indexing these days! I googled the number again and first thing that comes up in the search is a link to this thread! lol.. Only been a couple of hours.. wow..
HI include, thanks for the reply.
Well that's a good question, it's part of a cold corona ozone generating device.. I just figured it was a voltage regulator transistor? Maybe the folks at Motorola can tell me for sure... hmm.. Attempting to draw up the circuit for a similar design to be...
Thanks SunnySkyguy! Good to know I can get to the bottom of this. I assume I will have to disconnect one of the leads to get an accurate reading then?
Ken
Hello,
Looking to identify a diode on a circuit board, and can't make out the numbers= unreadable.
Is there a way to test a diode to see what it's properties are? Or is wattage determined by size somehow?
Size of the tube body is .200" x .104" lead wire size is .032"
I assume this might be...
Hello,
Here's one more component looking to identity:
H
Motorola Transistor:
Numbers: E5742 940
Should I assume this is the same as this?
MJE5742
https://pdf1.alldatasheet.com/datasheet-pdf/view/4863/MOTOROLA/MJE5742.html
Thanks again for all the help! Greatly appreciated..
Ken
Awesome Frank! Thanks so much for that info, thank you thank you. I was under the impression 500Hz meant 500 ppm which is obviously far from the case. : )
So looks like I may be dead in the water for now.
The original plan was to try this adjustable frequency square wave device here on ebay...
Thanks Frank. With more research am finding pulse rates vary between about 40 to 400 PPS with a duration of 5-500 nanoseconds. I wonder if it would be possible to modify something like this to do the job...
Hello,
I have a corona discharge device and working on building another based on the original unit. The circuit board seems rather simple, pulses voltage and delivers that to coil.
I guess I need to get o-scope to check for the pulsed frequency, but trying to determine if it's pulsed AC or DC...
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