How to determine capacitance with the info I have


Jelco does not have the capacitance of it's headshell and arm wiring for the 750.

They can provide the capacitance of thier tonearm cable, at 15pF/ft conductor and 37pF/ft for the shield. it is 1.2 meter.

How does this figure into a capacitance for the cable ? Do you add the conductor pF and shield pF together, times the total number of feet right and left cable ?

Also, does anybody have a guess of the tonearm capacitance of the 750D tonearm wire and head shell wiring ?
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Wayne in Northern Ohio, USA
waynefia

Showing 4 responses by waynefia

Brad yes it will be a MM, which is what started this quest for the total, which seems to high for MM. I will check the meters out.

Thanks
Al, thanks for the info, that is what I was looking for. It also seems to be an extremely high capaitance cable for use with a MM cartridge ?
Thanks Al, That Ortofon and many in the same series are looking for 400pf. The cartridge I am looking at now is rated at 100pf, big difference. That is what started this hunt for information. We are a distributor and sell meters. My digital does not have capacitance. I should be able to grab one with capacitance to check.
I also am finding after reading and emailing several cable people, that the lower conductor to conductor(thier words), is what most of the cables are spec'd at. So in the Jelco it would be 15pf/ft. Some of the others web sites and emails spec thiers at 15 to 20pf/ft. Nobody uses the sheild as part of thier spec, right or wrong it seems.