4pin jack?

birkomester · Post by **birkomester** » 06 May 2015, 08:38

How should i wire this jack?

FiveseveN · Post by **FiveseveN** » 06 May 2015, 09:14

Depends on what you're wiring it for.
Being the open type, its function is easily visible: the "extra" pin is open when a male connector is inserted, and shorted to Tip otherwise. Sticking the appropriate plug in might help you visualize it.
You can simply ignore this switching connection and treat it as a regular TRS connector.

birkomester · Post by **birkomester** » 06 May 2015, 09:19

FiveseveN wrote:Depends on what you're wiring it for.
Being the open type, its function is easily visible: the "extra" pin is open when a male connector is inserted, and shorted to Tip otherwise. Sticking the appropriate plug in might help you visualize it.
You can simply ignore this switching connection and treat it as a regular TRS connector.

Thanks
So can i just ignore the extra pin?
I want to test my guitar signal voltage using multimeter.

FiveseveN · Post by **FiveseveN** » 06 May 2015, 10:54

Yes. Though you don't really need a female connector to do that. And a guitar signal is not a constant sine wave, it has a large initial attack which will probably be "missed" with such a measurement; depends on your unit's integration time.
Also remember that a multimeter has some input impedance (rarely stated on lower-end models) that can load down passive pickups.

birkomester · Post by **birkomester** » 06 May 2015, 11:03

FiveseveN wrote:Yes. Though you don't really need a female connector to do that. And a guitar signal is not a constant sine wave, it has a large initial attack which will probably be "missed" with such a measurement; depends on your unit's integration time.
Also remember that a multimeter has some input impedance (rarely stated on lower-end models) that can load down passive pickups.

Multimeter always show 0 volt. Is this because the attack?

FiveseveN · Post by **FiveseveN** » 06 May 2015, 12:40

Have you set it on AC Volts? Are the probes making proper contact? Is the guitar's volume pot turned all the way up?

birkomester · Post by **birkomester** » 06 May 2015, 13:14

FiveseveN wrote:Have you set it on AC Volts? Are the probes making proper contact? Is the guitar's volume pot turned all the way up?

My multimeter does'n't have ac option.