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Discussion in 'General Electronics Chat' started by capnray, Jul 3, 2010.

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  1. capnray

    Thread Starter Member

    Jul 3, 2010
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    Well, I arrived here while searching for homemade bug zapper. It seems I found an old thread, however using a microwave oven transformer was the final answer, which I was going to suggest. I am retired, but my last position dealt with microwave generators from small to 100KW and at several different frequencies. If anyone has built one I could save time by perusing the design.
     
  2. sceadwian

    New Member

    Jun 1, 2009
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    Why not the flyback transformer from a larger CRT tube? They're easy to find and use and will provide more than enough voltage.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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    We are more than a bit iffy on the subject of homebuilt projects involving high voltages. The flyback will put out way more voltage than is really necessary, and the microwave transformer is a lethal shock hazard.
     
  4. capnray

    Thread Starter Member

    Jul 3, 2010
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    I agree. The flyback gives great HV, however having contacted that have been able to swamp the thing with little damage. Even the 100KW magnetrons operate at around an Ampere as do the smaller ones, sufficient current to fry a bug. In the endgame it is the current, not the voltage that does the real work...VA=power, kinda (power factor, AC or DC and losses). Voltage pushes electrons, current is the flow of them, the more the merrier. 15 KV at 1 mA is not a lot, 2KV at 1A is a whallop.

    OOPS, neither is to be attempted by anyone unfamiliar with either (see warning suggestion below), however I am familiar with both and will go for the whallop.

     
  5. loosewire

    AAC Fanatic!

    Apr 25, 2008
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    All the Universities use chemical money or another Insect to
    attack the problem.Most night Insect devises have propane tank
    attached.Big Oil and chemical companies.
     
  6. sceadwian

    New Member

    Jun 1, 2009
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    Yeah capnray, good luck rectifying that to a DC grid for a bug zapper..

    <snip>Commentary deleted by moderator
     
    Last edited by a moderator: Jul 3, 2010
  7. capnray

    Thread Starter Member

    Jul 3, 2010
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    2
    My transformer is complete with filament, B+ and a healthy diode. When Tomas Edison was approached by "corrections" personnel asking if his DC would work as an execution device, he replied that George Westinghouse's AC was much better for that. AC should work also. The way they ran electric executions was quite brutal..."overkill". A modern defibrillator could do the job without unjust damage to human tissue. Sorry, got off topic.
     
  8. beenthere

    Retired Moderator

    Apr 20, 2004
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    We are all familiar with lovable old Thomas A. doing in an elephant on stage to "prove" that Mr. Westinghous was a madman.

    This seems to have gone to a conclusion.
     
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