Unusual problem with output jack with emgs

[chevyforlife21]

I have a 2 year old guitar esp ltd1000 with factory emgs the jack totally shuts off the guitar like a killswitch if I put any forward pressure on it pointing towards the neck doesn't do it any other way. So I REPLACED the jack with a new one factory emg part wired the same way I took pictures solder joints are great SAME PROBLEM it's like it's grounding out somehow I tried bending the usual prongs in trick with the original nothing thought it was odd as that always works. If the jack touches the wood does it shutoff the circuit?


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[guitarSQUIRELL]

Re: Unusual problem with output jack with emgs

Sounds like it could be the end of your cable possibly.....Have you tried a different one?

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

If the hole for the jack is too tight, it'll squeeze the prongs and maybe the solder tabs, which could cause errant grounding.

 

[guitarSQUIRELL]

Re: Unusual problem with output jack with emgs

I have a stereo jack in a build I'm working on and I wonder if something like that is what my issue is. I didn't ground the hot lying of the stereo plug to ground (I haven't hooked anything to the hot side yet) and I have a bad hum when I plug it in.

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

You need two ground points on the jack - one for the normal passive system ground, and one to the tip of the jack which goes to the battery connector's ground. This connection completes the circuit which lets the battery do its thang. If you ground the battery to the system ground instead, it's always On, even when unplugged.

On the other hand, if you connect the battery hot to the wrong terminal, or not run any grounds, you would get buzz. It's like touching the end of the cable when it's running into the amp. You're the new ground, and you buzz.

 

[Funkfingers]

Re: Unusual problem with output jack with emgs

Sometimes, the jack plug itself is the problem.

One of my modified Yamaha Attitude Plus bass guitars routinely squeezes out any right-angled Planet Waves Custom Series jack plug within five minutes. (Straight PWCS jack plugs, no problem!)

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

That's a problem I've had with right-angle plugs as well - they're just not long enough where they need to be.

 

[chevyforlife21]

Re: Unusual problem with output jack with emgs

Sounds like it could be the end of your cable possibly.....Have you tried a different one?

Tried 3 different cables 3 different guitars


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[chevyforlife21]

Re: Unusual problem with output jack with emgs

Here's a picture


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[dominus]

Re: Unusual problem with output jack with emgs

Do you have the black wires reversed? The ring connector goes to the battery, the sleeve connector is the ground that would go to the pot/pickup.

In your picture the top black wire is the ring, the black wire in the "middle" is the sleeve. (The white wire is the tip, which is the "hot" output for the pot/pickup.)

 

[chevyforlife21]

Re: Unusual problem with output jack with emgs

Do you have the black wires reversed? The ring connector goes to the battery, the sleeve connector is the ground that would go to the pot/pickup.

In your picture the top black wire is the ring, the black wire in the "middle" is the sleeve. (The white wire is the tip, which is the "hot" output for the pot/pickup.)

This was original as far as I know I wires the new one the same it only mutes off if I put tension on the cable forward so 3/4 of the time it's fine but it sounds great besides that so I wouldn't think the wires. The middle wire is much thicker


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[DrNewcenstein]

Re: Unusual problem with output jack with emgs

So wait, the problem only happens when you push or otherwise put tension on the cable when it's already plugged in and working fine?

No one does that. You have no reason to do that. None. Ever.

When you push the plug in like that, you're pushing the tip beyond the connecting prong on the jack. There's this little bent piece that sits in the little narrow part of the plug between the shaft and the tip. You're pushing it further in and the little bent tab is leaving the little narrow part, breaking the circuit.

Stop doing that and your problem will go away.

 

[dominus]

Re: Unusual problem with output jack with emgs

So wait, the problem only happens when you push or otherwise put tension on the cable when it's already plugged in and working fine?

No one does that. You have no reason to do that. None. Ever.

When you push the plug in like that, you're pushing the tip beyond the connecting prong on the jack. There's this little bent piece that sits in the little narrow part of the plug between the shaft and the tip. You're pushing it further in and the little bent tab is leaving the little narrow part, breaking the circuit.

Stop doing that and your problem will go away.

If that's what happening, add a washer or thicker nut to the jack on the outside of the jack plate.

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

I'm pretty sure there's about 1/16" of the plug sticking out of the jack as opposed to a regular jack, and this is why he's pushing it further - it looks odd because mono jacks typically don't behave this way, and looks like it's not in all the way.
This has been my experience with stereo jacks.

You might be able to disassemble the jack and add a spacer before the tip prong, letting the plug's shaft go all the way in like a mono jack.

Or you could just not push the cable further than it needs to go. It has no cherry.

 

[guitarSQUIRELL]

Re: Unusual problem with output jack with emgs

Ok....I dont mean to change the subject or HYJACK this thread, but, I have a stereo jack as well in my guitar...If im not using the "hot" leg at the moment, will it create a bad Hum? And should it be grounded with the ground circuit if not being used?

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

That's not the primary Hot leg, though with a 1/4" TRS cable it can be Hot 2 (for the Ring on the other end of the cable, or to one side when used with a 1/4" TRS-to-dual-mono 1/4" Y cable). For a mono 1/4" cable, it's Ground 2.

That's used for the on/off of the battery in an active circuit, which is why the battery ground goes to it. If you were to wire the battery ground to the normal ground lug, your battery would drain when the guitar was unplugged, just as if you had wired it to a mono plug. It's normally isolated from the rest of the guitar's ground system, and only comes into play when the jack is inserted.

 

[guitarSQUIRELL]

Re: Unusual problem with output jack with emgs

That's not the primary Hot leg, though with a 1/4" TRS cable it can be Hot 2 (for the Ring on the other end of the cable, or to one side when used with a 1/4" TRS-to-dual-mono 1/4" Y cable). For a mono 1/4" cable, it's Ground 2.

That's used for the on/off of the battery in an active circuit, which is why the battery ground goes to it. If you were to wire the battery ground to the normal ground lug, your battery would drain when the guitar was unplugged, just as if you had wired it to a mono plug. It's normally isolated from the rest of the guitar's ground system, and only comes into play when the jack is inserted.

So you're saying that if you don't use it for a battery at the moment and only have 2 wires hooked to it like a mono jack, I should ground the ring to the actual ground?

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

It's not a requirement. As long as all your grounds meet at the same place on the jack, you should be fine. If you later add active pickups or some other reason to have a battery, you could run the battery ground to the unused terminal (the one that's normally the ground in a mono jack) and get the same end-result as wiring it "normal".

The key thing to remember is that something has to touch the tip (Hot) and something else has to touch the shaft (Ground) to complete a circuit. So, while the standard Ground tab on a Mono jack is also found on a Stereo jack, and the Stereo jack has the optional 2nd leg that touches the shaft, either of these can be used as the main system (bridge and pots) Ground point.

 

[DrNewcenstein]

Re: Unusual problem with output jack with emgs

To explain it to death:

The Tip of the jack rests in the indention behind the Tip of the plug.

On a stereo TRS (Tip-Ring-Sleeve) plug, the Ring leg of the jack rests against the Ring of the plug, which is usually separated from the Tip and the Sleeve of the plug by two small bands of non-conductive material.

The Sleeve of the jack touches the Sleeve/Shaft of the plug.

For a standard mono setup, where the Ring of the jack is not present, you would only have Tip and Sleeve lugs and connections with the plug.

In an active configuration (EMGs or active circuits for passive pickups), the Ring lug of the jack gets the battery ground only, while the system ground (pots) goes to the Sleeve lug of the jack.

It's also illustrated here:
http://www.seymourduncan.com/support/wiring-diagrams/schematics.php?schematic=1activehum_1v_1t

However, the Ring and Sleeve connections are interchangeable, in that if you have a passive pickup system and a stereo jack, you have the option of connecting the Ring or the Sleeve to your system ground. If you connect the Ring lug to the system ground and later change to active pickups or some other active circuit for passive pickups (i.e. gain boost, mid sweep, etc) then you can simply connect the battery ground to the Sleeve lug, rather than having to swap wires around.

If your current passive pickup scheme is using a stereo jack, only one of the Sleeve or Ring has to be grounded. The other can sit there unused and neglected for eternity without issue.

 

[chevyforlife21]

Unusual problem with output jack with emgs

So wait, the problem only happens when you push or otherwise put tension on the cable when it's already plugged in and working fine?

No one does that. You have no reason to do that. None. Ever.

When you push the plug in like that, you're pushing the tip beyond the connecting prong on the jack. There's this little bent piece that sits in the little narrow part of the plug between the shaft and the tip. You're pushing it further in and the little bent tab is leaving the little narrow part, breaking the circuit.

Stop doing that and your problem will go away.

It happens with a straight or right angle cable too but it's not me is the problem when I sit down it shorts out and shuts off is my problem something is wrong first guitar of the 30 I've had to do that I've also tried tightening the tip connection. So your saying add a washer on the outside or inside of the jack plate?


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