Carnhill - Measuring inductance

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Carnhill - Measuring inductance

Postby chris p » Wed Feb 20, 2008 10:35 am

Sitting on my desk in front of me are three Carnhill inductors for my EQ project -

VTB9043 (= Neve T1295)
VTB 9044 (= Neve T1280)
VTB9050 (= Neve T1530)

While the Carnhill inductors have the same taps as the Neves, they do not seem to be a drop in pin for pin replacement when I look at, say, a BA211 PCB. I didn't get any documentation with the coils. So does anyone here know the pin outs of the Carnhills (the Carnhill website is not helpful) - and yeah, the pin soldered to the shield casing I'm guessing is ground :-)

I know I can measure inductance by setting up an oscillator and a volt meter, but I'm lazy enough to ask for help first.

Anyone?
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chris p
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Postby chris p » Wed Feb 20, 2008 1:15 pm

and here's the answer already.

I don't need to measure impedance, 'cause I know the values - I just need to know which pin is which, and that can be done by measuring simple DC resistance - higher resistance, higher impedance.

It turns out that the values go clockwise looking from the top - easy once you've found where 0H is.
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