<span style="font-family: Arial; font-size:12pt">Don' forget go have the bulb side in the Hot side, for the continuous type. For the alternating type ( I've never seen this type) I think you're pretty much upgeflegt.<br>I have one that lights an LED and get frustratingly mixed results.<br>ALSO, a binary search style can help greatly.<br><br>That said, it'll always still always be the last one you check. (;-D)<br><br>Regards, Steve Noskowicz<br>Science & Technical Advisor<br>challengerillinois.org<br>From my tablet.</span><span style="font-family: Arial;"><br><br>-------- Original Message --------<br>From:Greg D via aprssig <aprssig@tapr.org><br>Sent:Sat, 05 Dec 2015 22:03:14 -0800<br>To:Robert Bruninga <bruninga@usna.edu><br>Cc:TAPR APRS Mailing List <aprssig@tapr.org>,Bob Bruninga <wb4apr@amsat.org><br>Subject:Re: [aprssig] Electric Field Sensor (XMAS lights)?<br><br></span>
Hi Bob,<br>
<br>
The kind I have has a probe that fits between the two wires at the
base of the lamp socket, and it works pretty well (today, in fact!)
if you push the 3rd wire away a bit. I got the probe at K-Mart a
few years ago, but don't see it anywhere on line now. The new ones
all have a blunt tip, which I expect is what you have, and I can see
it would be more difficult to use successfully.<br>
<br>
But Bob, you've made your mark on civilization by finding simple,
elegant ways to do things, not making them more complicated! Since
you're experienced with working around such voltages safely, perhaps
this simpler approach would be more appropriate:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.edn.com/design/test-and-measurement/4359491/Simple-tester-checks-Christmas-tree-lights">http://www.edn.com/design/test-and-measurement/4359491/Simple-tester-checks-Christmas-tree-lights</a><br>
<br>
Good luck!<br>
<br>
Greg KO6TH<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Robert Bruninga via aprssig wrote:<br>
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<div>Sorry for the off topic.<br>
<br>
</div>
Will one of these cigar sized (yellow) electric
field sensors be any use in finding the bad bulb
in a series XMAS light string?<br>
<br>
</div>
It beeps in the presence of an electric field and
detects AC about 6 inches <a moz-do-not-send="true"
href="http://away.th">away.th</a> this?<br>
</div>
<br>
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I can find no difference all along the string. But then
this is a 3 wire string with a receptacle on the end so
there is AC end to end, even though there is a series
bulb out.<br>
<br>
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Maybe this technique will work on a 2 wire loop string and
not a 3 wire?<br>
<br>
</div>
I'm happy to cut off the end plug and pull out the 3rd wire
if someone claims it will work on a 2 wire string.<br>
<br>
</div>
Sorry for the off topic post, but I'm probably not the first
one with this dumb question at this time of year.<br>
<br>
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<div>Bob<br>
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B<br>
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