Too many variables, you should say more about what/how you do... How do you check the resistance before installing, what type of wick/wire/etc are you using, etc. Anyway, a few hints:
1) some coils get shortcircuited (touch to one another, or touch some metal) while/after installing in the RBA, making the resistance effectively lower than it was before.
2) your multimeter, presuming you use one, is off and reads too much resistance. Set it to ohm/resistance and make the two probes of the meter touch: if you read anything else than zero, you shold subtract that value from the resistance reading of your coils.
That is: if you meter reads 0.4 when the probes are in contact, the 1.5 reading of your coils is actually 1.1, too low for the vamo. BTW, that should be expected with cheap, off-the-shelf meters.
3) your vamo is defective. I'd expect this not to be the case, though, as the first two suggestions above look much more likely to me.
I should have been more explanatory.
I am using a multimeter to check resistance and yes I have accounted for the resistance in the probes by subtracting that from what it reads. I'm using 30 gauge kanthal with a 5/6 wrap and it is reading 1.6 on the Vamo where as on the multimeter it reads 2.4. The wick is well oxidized and no coils are touching.
Sent from my Minds Eye

