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Registered Member #3075
Joined: Fri Aug 06 2010, 02:44PM
Location: Athens, GA
Posts: 148
Dr. Kilovolt wrote ...
Run the transformer in reverse, and calulate the ratio from that.
To "run it in reverse", I should hook up the HV output wires to the 120VAC power cord, then measure the output on the input wires of the transformer?. I assume this would have the opposite effect of normal and step down the voltage to a certain amount on the input side. I suppose once I get that number, I can determine by what factor it was reduced, and simply apply that factor to the input V to see what the output should be?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
HM_Murdock, yes thats what I meant, connect the secondary to 120VAC and measure the voltage on the primary. Then the step-up ratio is 120V divided by the voltage you measured on the primary.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
I Googled "Fly Killer Transformer Voltage" and found that the majority of consumer fly killers have 3500V, 3750V, or 4000V on the grid, but that industrial fly killers went up to '5600V peak.'
Below is a picture of the guts of the Flowtron FC Zapper. The transformer has a similar looking colour scheme to yours. The replacement transformer is the same whichever Flowtron zapper model you buy. All have a 5600V Killing Grid Voltage.
I expect they are waiting for another ship to arrive from far distant lands!
Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
That would be the ideal transformer case. It's possible that in the reverse configuration that the relatively low mains voltage is being ballasted by the secondary's (or in this reverse case, the primary) resistance and/or inductance. The voltage drop across these impedances would mean less voltage across the coupled inductance and getting to your multimeter. I'm not sure about this but it's also possible that the current going through isn't fully magnetizing the core?
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Xfmr identification
