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Gibson Les Paul Signature output panic!

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Gibson Les Paul Signature output panic!

PostPosted: Sat Jan 25, 2020 7:17 pm
by Wonks
Just finished working on Arkieboy's Gibson Les Paul Signature (a 1973 one I believe). A new selector switch (as the old one had disintegrated) and a fret level to remove all the dents in them.

Did all that, plugged it in on the nice socket on the top of the guitar, just like a 335 has, and had to turn the amp right up to hear anything at all. I was sure it was far louder than that when it got dropped off and Arkieboy plugged it in.

I knew it had low-impedance pickups and passive circuitry, so its wiring certainly isn't the normal arrangement. I needed a circuit diagram to even begin to try and fault find. Finally managed to track one down on the Gibson web site (they'd called it LPSignature, so a logical search for 'Les Paul Signature' returned nothing).

Then realised that the wiring diagram showed two output sockets - a TRS and a TS one. Looked on the side of the guitar and there was another jack socket (the sly buggers!). Plugged into that and normal volume levels ensued. The top jack is the balanced low impedance output.

Panic over.

Re: Gibson Les Paul Signature output panic!

PostPosted: Sat Jan 25, 2020 7:49 pm
by Eddy Deegan
:lol:

If it's any consolation, it's not just you. I did something similar once, insofar as I brought my shiny new SY85 along to a band rehearsal, plumbed it into the PA and expected greatness.

What I got was... odd. After several minutes of panic thinking it was faulty and would have to be returned for repair/replacement I realised I'd plugged in outputs 3 + 4 instead of 1 + 2.

Outputs 3 + 4 default to the wet output from the FX :headbang:

Re: Gibson Les Paul Signature output panic!

PostPosted: Sun Jan 26, 2020 1:57 am
by zenguitar
At least Gibson had the sense to make the wiring diagram available even if it wasn’t straight forward to find. Glad you got it sorted :clap:

My afternoon was spent gluing a snapped off headstock back onto an old classical guitar. Nearly two hours peering through a big magnifying lamp and reading glasses wielding my fine jeweller’s tweezers and a scalpel removing stray and damaged wood fibres. And then another hour preparing and gluing. But it was worth the effort, went back together first time.

Andy :beamup:

Re: Gibson Les Paul Signature output panic!

PostPosted: Sun Jan 26, 2020 9:22 am
by Wonks
Well, if these classical guitarists will insist on throwing their guitars around on stage to show off, what can they expect? :D

Re: Gibson Les Paul Signature output panic!

PostPosted: Sun Jan 26, 2020 11:38 am
by zenguitar
It least I managed to convince him that a Floyd Rose was a poor upgrade choice. ;)

Andy :beamup:

Re: Gibson Les Paul Signature output panic!

PostPosted: Sun Jan 26, 2020 11:48 am
by Music Wolf
Quite right. Everyone knows that it's a Bigsby or nothing on a classical guitar.

Re: Gibson Les Paul Signature output panic!

PostPosted: Sun Jan 26, 2020 2:39 pm
by ManFromGlass
Yes - also the choice of Neil Segovia Young!
Love his Mozart/Heart of Gold homage

Re: Gibson Les Paul Signature output panic!

PostPosted: Mon Jan 27, 2020 12:38 am
by arkieboy
I don't think I've ever used the low impedance output TBF.

For me one of the big attractions of the guitar is the simplified 'decade' control from Les's other 70s guitars: the 3 position 'level' control (as named from the circuit diagram a rather relieved Wonks sent me :bouncy: ) basically changes the thickness of the guitar sound, from something I've always labelled as 'P90' through normal humbucking midrange to 'dial turned to 11'. You can really cover a huge range of bases with that and the phase knob - from Larry Carlton to pre-'Grace' Alex Lifeson pretty much. The decade control is inactive on the low impedance circuit ...

Despite it not seeing a competent luthier for decades, this was still arguably my best playing guitar. Really looking forward to how it plays when I get it back!!

IIRC there are only something like 1500 of these around. I've seen one played by the guitarist in Loose Tubes, I think someone in the Foos has one, one of Bob Plant's current guitarists uses one too I think, and (significantly) the late Boon Gould used one on early Level 42 material.

Re: Gibson Les Paul Signature output panic!

PostPosted: Mon Jan 27, 2020 12:43 am
by arkieboy
Also I'm fairly certain I swapped around the outputs - I figured if I ever damaged the guitar from yanking the jack, it would be easier, and less visible, if the damage was on the side rather than the face.

Apologies!

Re: Gibson Les Paul Signature output panic!

PostPosted: Sun Feb 02, 2020 11:51 pm
by arkieboy
So I popped round Wonks' yesterday afternoon to pick up said guitar, and took it to an Oxford Gang Show rehearsal today because ... well, because!

It is now effortless to play and a number of the odd chords in some of the big band numbers - 'Crest of a Wave', 'Rain on my Parade', you know I'm talking about you C#dim7/C - which previously were a bit hit-and-miss, just fall under the fingers.

I should also mention that this year we get to do 'Another Brick pt. II'. The the kids are brilliant: perfect surly, resentful attitude. Score is cut before the guitar solo. FML. Which is why he's looking at my John Mayer Strat now ... :bouncy:

Re: Gibson Les Paul Signature output panic!

PostPosted: Mon Feb 03, 2020 11:41 am
by Wonks
You're going to need to get some more guitars just so I can keep working on them!

Re: Gibson Les Paul Signature output panic!

PostPosted: Tue Feb 04, 2020 10:13 am
by arkieboy
Wonks wrote:You're going to need to get some more guitars just so I can keep working on them!

Challenge accepted ;-)

Re: Gibson Les Paul Signature output panic!

PostPosted: Tue Feb 04, 2020 12:47 pm
by BigRedX
arkieboy wrote:IIRC there are only something like 1500 of these around. I've seen one played by the guitarist in Loose Tubes, I think someone in the Foos has one, one of Bob Plant's current guitarists uses one too I think, and (significantly) the late Boon Gould used one on early Level 42 material.

Andy Ryder of Medium Medium used one to great effect in the early 80s along with a Roland Jazz Chorus amp.

Re: Gibson Les Paul Signature output panic!

PostPosted: Fri Feb 07, 2020 11:59 pm
by arkieboy
BigRedX wrote:
arkieboy wrote:Andy Ryder of Medium Medium used one to great effect in the early 80s along with a Roland Jazz Chorus amp.

Thanks! Another one for the list!