Helpful tips

How do you measure the capacitance of a cable?

How do you measure the capacitance of a cable?

The capacitance of all electrical devices, including wires, can be measured using a multimeter.

  1. Connect the probes to the multimeter. There should be two that are colored red and black, and these are provided with the multimeter.
  2. Switch on the multimeter.
  3. Switch the multimeter to capacitance mode.

What is capacitance in a cable?

In a cable, the capacitance is usually measured in picofarads per foot (pf/ft). This indicates just how much electrical energy the cable can store. Capacitance can be viewed as an intimate ongoing relationship between the conductor and the ground plane.

What should the capacitance reading of a guitar cable be?

Good audio cables, not just guitar cables, measure out at about 30 picofarads (or 30pf) per foot. The best low capacitance cables are about 15pf/foot.

How does capacitance measure?

A multimeter determines capacitance by charging a capacitor with a known current, measuring the resulting voltage, then calculating the capacitance. Warning: A good capacitor stores an electrical charge and may remain energized after power is removed.

What is the symbol for capacitance?


Common symbols C
SI unit farad
Other units μF, nF, pF
In SI base units F = A2 s4 kg−1 m−2
Derivations from other quantities C = charge / voltage

Why are buried cables capacitive?

In Underground cables, obviously, the separation is relatively smaller. Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines.

Do thicker wires have more capacitance?

capacitance seems to be based on “Permittivity” which is a function of conductivity which would imply that it will differ by from copper to aluminium. also the area of the conductor, so that conductors with a larger surface area have more capacitance.

Do guitar cables affect tone?

The electrical resistance of a guitar cable is insignificantly tiny compared with the impedance of the pickups and controls, so that won’t affect your tone a great deal, but cable capacitance is another matter altogether. After all, the entire history of guitar sound is built on technological imperfections.

How do I test a guitar cable with a multimeter?

Testing cables with a multimeter

  1. Set your multimeter to resistance (ohms; symbol: Ω), choosing a very small scale.
  2. Place both plugs of the same cable on the wooden surface of your table.
  3. Touch both plug tips with the probes – the red one going to one plug, the black one to the other.

Do Mogami cables really make a difference?

SOS Technical Editor Hugh Robjohns replies: The short answer is no, they’re very unlikely to sound any better. The longer answer is that there are complexities and subtleties involved that can, in specific circumstances, conspire to affect the sound when using different types of cables and connectors.