Dual coil question

[Jake Dubbya]

Hi
I've been using prebuilt coils for a few years and just got a subohm innovations rDa and some premade coils - 0.4 ohm Clapton coils.
I've put a two coils into the subohm RDA and they're both heating up fine from the centre out, with no hot spots
However I put the RDA on my ohm meter and was surprised that it read 0.4 ohms- I thought with dual coils I should be getting a 0.2 ohm reading?

So I'm not sure what I've done wrong?
I assume the connections to the posts are good as both coils are heating up.

Any advice greatly appreciated!
Thanks all

 

[Jake Dubbya]

Hi
I've been using prebuilt coils for a few years and just got a subohm innovations rDa and some premade coils - 0.4 ohm Clapton coils.
I've put a two coils into the subohm RDA and they're both heating up fine from the centre out, with no hot spots
However I put the RDA on my ohm meter and was surprised that it read 0.4 ohms- I thought with dual coils I should be getting a 0.2 ohm reading?

So I'm not sure what I've done wrong?
I assume the connections to the posts are good as both coils are heating up.

Any advice greatly appreciated!
Thanks all

 

[Izan]

Hi mate, not to be overly obvious, but, why not build it with one coil and confirm the resistance of the pre-mades?

Cheers
I

 

[Jake Dubbya]

I'll give that a go later tonight, it's been so long since I built my own coils I've forgotten some of the basics, but I also assumed that the pre-made coils would perform as stated on the box!

 

[sonicbomb]

Take away one coil and measure again.

 

[93gc40]

If you are getting .4ohm using 2 .4ohm coil.... then one of the coils isn't getting contact.

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[Jake Dubbya]

If both coils are heating up,does that mean they are both getting contact?

 

[thomas l]

I"ld agree with sonicbomb, pull one coil back out to double check to coil is .4

 

[93gc40]

Normaly yes.... are you sure the coils were the starting ohm you assumed?

I mean.... you did test their ohm prior to instal.. right?

this is why we need to use a stand alone Meter when building....

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[Jake Dubbya]

I just tested one coil and it read 0.8 despite them being sold as 0.4 each, so I guess I found my problem
Thanks everyone

 

[classwife]

(merged duplicate threads, please don't cross post )

 

[sonicbomb]

It's possible the vendor assumes you will use them in a dual configuration, and states the final combined resistance for convenience.

 

[93gc40]

It's possible the vendor assumes you will use them in a dual configuration, and states the final combined resistance for convenience.

If they are selling them in pairs or sets they might..as a specific build... but they wshould still be sold or listed by individual rating....

Still safety requires you know what you have BEFORE you install or use it.

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