Question about RBA coil

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bizziboi

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Sep 21, 2013
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Hi,
I am posting here since, well, said coil sits on a Reo and I can't see where else to post it - and I'm following Rob's video for making a coil so well - Reo forum.

I have something with my coil I can't understand. Made one of those loose coils wrapped around a double strand of silica, 5 wraps and it meters out at 2 ohm, all okay. Weird thing, when I put the cap on (an ERA RBA) it moves to 5 ohm, which doesn't make sense - as if it would be the coil touching the outside wouldn't it drop instead of go up?
Also noticed that if I move the coil around it's resistance changes significantly....makes little sense?

Okay, it's been a while since I was in high school, but it doesn't quite compute to me - could someone enlighten?

Thanks :eek:)
 

Treebeard

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May 27, 2013
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Thanks. Ah, I thought that could be the reason. Crappy thing is the ERA has screws that break the wire if you tighten them too much. Guess I did good in ordering a RM2 last night :eek:)

I have had to file the sharp edges from the bottom of screws on several of my rebuildables because I was cutting the wire. I make them rounded at the bottom where it meets the wire.
 

supertrunker

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Oct 12, 2012
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you can tell when the screws are tight enough if you look at the wire as you tighten the screws - the wire lifts up a little. It's hard to describe it apart from to say that it's like a dog cocking its leg to pee!

if you inadvertently break a wire by overdoing it, just throw the coil away and make another (same wick if you like) because the resistance readings will drive you to madness.

T
 
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