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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 1 response by ecir38

ecir38
155 posts
 
Hi, you don't mention type of cartridge you will be using. If it is MC you don't have to worry about capacitance. If you will be playing with a MM/MI it may be worthy to have a capable meter for the tool box.

Here is a cheap example which I don't have any experience with but looks like it would do the job.

http://cgi.ebay.com/Digital-Capacitance-Voltmeter-Test-Meter-Multimeter-/320547379334?pt=2_Way_Radios_FRS&hash=item4aa21cd886

This is the one I use which also allows measurements of resistance and inductance (LCR meter). Nice meter that will last for years to come.

http://cgi.ebay.com/NEW-BK-Precision-LCR-meter-3-digit-LCD-handheld-875A-/260602942047?pt=LH_DefaultDomain_0&hash=item3cad25525f

As noted in post above you measure between ground and hot with the cables disconnected from everything but the capacitance meter.

Brad
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