What is it that makes a coil (in a clearo) have a different resistance than another. In other words, by looking at a 1.8 next to a 2.4, what should I see that makes them different? Or is it something internally? Just curious....sometimes I get a surprise and the coil I bought and thought was a 2.8 is read on my mod as something different.
Resistance question
- Thread starter Jackstraw
- Start date
- th_trl_thread_readers 0
- Status
The length of the wire and the thickness of it are the primary factors.
Thicker wire has less resistance, i.e. lower ohms.
Shorter wire (less wraps or shorter legs to metal contact) has less resistance. Again lower ohms.
Thickness is measured as the gauge of the wire. Lower # gauge like 28ga is much thicker and lower resistance than higher # like 32ga.
Why a factory '2.8ohm' reads much different is beyond me. +/- 0.2ohm is often noted as an acceptable expected variance.
Thicker wire has less resistance, i.e. lower ohms.
Shorter wire (less wraps or shorter legs to metal contact) has less resistance. Again lower ohms.
Thickness is measured as the gauge of the wire. Lower # gauge like 28ga is much thicker and lower resistance than higher # like 32ga.
Why a factory '2.8ohm' reads much different is beyond me. +/- 0.2ohm is often noted as an acceptable expected variance.
Likewise, looking at two coils of the same resistance, they may look different. Resistance of heater wire is often given as fractional ohms / inch (or feet, or...) So it's entirely possible to have more turns of thicker wire - i.e. more length of lower resistance wire - give the same final resistance as fewer turns of higher resistance wire. Of course, you do have to fit the coil into a head without shorting out the legs!
Some mod meters are known to be not terribly accurate. That may be the cause of the difference.
Some mod meters are known to be not terribly accurate. That may be the cause of the difference.
- Status
Similar threads
