Lee_M
Well-known member
Hey guys,
I've picked up some nice enamelled wirewound resistors (the green "W21" type) for use in DIY builds.
I was aware they would have measureable inductance due to their construction, So I tested some out on my cheapo LC meter....Which showed some resistor values having over 20H of inductance!?
The meter seems to work ok for most inductors and transformers I've used it on, I've got various BBC transformers which measured correctly for primary L (according to BBC specs) and all of the inductors I've tested match the labelled values, so it seems to work properly for the most part.
Is this a normal thing for vintage wirewound resistors or is my LC meter acting crazy?
It seems excessively high to me...But what do I know?
More importantly, What kind of problems could this cause in circuits and what purposes should I avoid using these wirewounds for?
I've picked up some nice enamelled wirewound resistors (the green "W21" type) for use in DIY builds.
I was aware they would have measureable inductance due to their construction, So I tested some out on my cheapo LC meter....Which showed some resistor values having over 20H of inductance!?
The meter seems to work ok for most inductors and transformers I've used it on, I've got various BBC transformers which measured correctly for primary L (according to BBC specs) and all of the inductors I've tested match the labelled values, so it seems to work properly for the most part.
Is this a normal thing for vintage wirewound resistors or is my LC meter acting crazy?
It seems excessively high to me...But what do I know?
More importantly, What kind of problems could this cause in circuits and what purposes should I avoid using these wirewounds for?