Hi all,
I just joined this site. The amount of info is staggering and very useful. My question concerns audio speaker crossover air coil test frequencies. I am building outboard crossovers and needed to buy 1.0mH, .91mH, .75mH and 0.2mH coils. The manufacturer guaranties their coils to be within 1%.
I based my order on tests results of the coils I was replacing with my LCR meter, which automatically selects the test frequencies as follows: 200kH at .3mH and lower, 14.925kH for .3mH to 4mH and 1kH for 4mH to10mH.
When I tested the new coils, the 1.0 measured .896, the .91 measured .82, the .75 measured .675 and the .2 measured .145. I called the manufacturer, and was told they use 1kH for the coils I bought, and this was the reason for the discrepancy.
Is there a way to find out what mH, measured at 1kH, I need based on my measurements made at 14.925kH and 200kH?
Thanks,
henrylr
I just joined this site. The amount of info is staggering and very useful. My question concerns audio speaker crossover air coil test frequencies. I am building outboard crossovers and needed to buy 1.0mH, .91mH, .75mH and 0.2mH coils. The manufacturer guaranties their coils to be within 1%.
I based my order on tests results of the coils I was replacing with my LCR meter, which automatically selects the test frequencies as follows: 200kH at .3mH and lower, 14.925kH for .3mH to 4mH and 1kH for 4mH to10mH.
When I tested the new coils, the 1.0 measured .896, the .91 measured .82, the .75 measured .675 and the .2 measured .145. I called the manufacturer, and was told they use 1kH for the coils I bought, and this was the reason for the discrepancy.
Is there a way to find out what mH, measured at 1kH, I need based on my measurements made at 14.925kH and 200kH?
Thanks,
henrylr