Questions from a new 1970 S100 Owner

Groundwire

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Hi LTG Members,

I have a few questions regarding my newly acquired 1970 S100 and I was hoping you all could shed some light.

First, the pickups: I am certain they are original HB1’s. I have read GAD’s extensive article and pulled the neck pickup and for certain they are original. Here’s my question: I measured the resistance of each pickup and both were in the high 8k range. This seems unusual, no? I was measureing from a cable plugged into the output Jack, and not from the pickup leads, but it’s still usually pretty accurate. The guitar is hot sounding, but I have never played another S100 before to know if this is typical. My understanding was that HB1’s were usually in the 7k range. Has anyone seen these pickups with such a high reading?

Second question is about the bridge: Mine has the hagstrom bridge and vibrato. Is the vibrato arm supposed to be removable? I unscrewed the set screw that holds the arm in place, and it turns, but doesn’t come out of the collar. Also, the set screw seems to have bored a permanent divot into the arm and so it only stays put in one position, which is too low to the body to be useful. If I could remove the arm, I’d attempt to fill it with something and reset it for a different height. Is this possible?

Final question: has anyone tried 50’s wiring on their S100? I see the tone pots are wired to the input of the volume pot, and it would be simple to move them to the middle lug, but since this guitar has untouched original solder joints, I want to get a couple opinions before messing with it. I generally prefer 50’s wiring on dual humbucker guitars because it preserves the high end when I roll the volume back, which I do a lot. Anyone done this and does it work with these pickups or does it make it too bright?

Thanks to all for the helpful responses. Cheers.
 

Guildedagain

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Willkommen! And bienvenue! Welcome!

Two things, ok three.

How accurate is your meter? Is it an old USA Fluke like mine ;]

What is the resistance of your leads? It should be subtracted.

What is the temp at your time of measurement?

DC resistance goes up with temp. I try to measure p'ups around 68ºF, average house temp. If you like it at 80º, it will make readings hotter.

As always, make sure all the knobs are up, way up ;]
 

Groundwire

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Willkommen! And bienvenue! Welcome!

Two things, ok three.

How accurate is your meter? Is it an old USA Fluke like mine ;]

What is the resistance of your leads? It should be subtracted.

What is the temp at your time of measurement?

DC resistance goes up with temp. I try to measure p'ups around 68ºF, average house temp. If you like it at 80º, it will make readings hotter.

As always, make sure all the knobs are up, way up ;]
Thank You!
Meter is a new Extech. Pretty accurate I believe.
Temp in my music room is 67 Degrees.
Knobs all the way up.
Lead is a 6” patch cable to effect should be minimal. On my Strat bridge p/u I get nearly the same 6.2k measuring either at the p/u or the cable.
Neck- 8.45
Bridge- 8.8
Just checked again. Same readings. Also consistent with what the seller listed in the Reverb listing. I thought it must be a typo or mistake because it seemed too hot but I get the same readings. Strange?
 

Guildedagain

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Somebody got high before winding the pickups? ;]

I'll check mine and see, it's a '73 and I don't know what the DC resistance is.

Something that's harder to measure is inductance, measured in Henries, affects tone as well.

 

Groundwire

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Somebody got high before winding the pickups? ;]
Possibly! This is unusual though, yes? I’d wonder if they’d been rewound. Normally it’d be obvious, but because of the solder terminals on these pickups, you’d not be able to tell in the control cavity. In any case, they sound amazing... hotter than most vintage style humbuckers but bright, biting, and uncompressed. Very fun to play percussive rhythm and spanky leads which is not typical for a humbucker equipped guitar...
 

Guildedagain

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I doubt they're rewound, but not impossible. A good visual inspection should ascertain whether they're virginal or not ;]

Mine measure 7.38kΩ neck, 7.31kΩ bridge, my leads only measure .2Ω DC resistance.

I'd say you got a set of hotter, slightly overwound pickups, maybe Guild trying to make sure they were as loud as a Gibson?
 

mushroom

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Hello

Regarding the trem arm. They are removable (well mine is) and I believe the divot is supposed to be there as a sort of locking.
Same on an old Hagstrom I had once.

Picture of mine.

1617239038045.jpeg
 

Groundwire

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I doubt they're rewound, but not impossible. A good visual inspection should ascertain whether they're virginal or not ;]

Mine measure 7.38kΩ neck, 7.31kΩ bridge, my leads only measure .2Ω DC resistance.

I'd say you got a set of hotter, slightly overwound pickups, maybe Guild trying to make sure they were as loud as a Gibson?
I suppose there is a lot of variation around this era. It sounds fantastic, so no reason to get strung out about resistance readings. Being a new Guild owner though, I’m wanting to learn as much about my guitar as I can. Thanks for taking the time to measure your pickups.
 

Groundwire

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Hello

Regarding the trem arm. They are removable (well mine is) and I believe the divot is supposed to be there as a sort of locking.
Same on an old Hagstrom I had once.

Picture of mine.

1617239038045.jpeg
Thanks! I’m having to look through the screw hole so it looked like th set screw ground a divot, but this makes more sense. I think mine is just probably stuck having maybe never been removed.
 

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Groundwire

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Here’s a few more pics
 

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Guildedagain

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Gorgeous, I love the butterbean Grovers.

Does that have more headstock pitch than my '73?

I just realized that it the Lefty axe wielder is to the left of the drums, he's a lot less likely to hit the cymbals than a Righty guitar player, and this headstock doesn't look like it ever hit any cymbals ;] Not that every band is the same, but;

"As a guitarist myself I like being on the left as well for the same reason. I feel more comfortable "communicating" with the band from that position."

I always play guitar to the left of the drums, and bass to the right of the drums, always have.
 
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Groundwire

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Does that have more headstock pitch than my '73?
Well the neck is flat, with no angle, and the headstock appears to have about the same pitch as my SG. Maybe just slightly less. The break angle over the bridge and nut are both very nice. Not too steep.
 

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Guildedagain

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Same as mine, it just looked steeper laying on its back.

I believe the steepest angle Gibby every had in the 50's was 14º, which probably accounted for a lot of broken headstocks. By the 70's they were very very flat, not as good for tone or playability, and they had a big honkin' volute, and 3 piece necks, and people still broke them with amazing regularity.
 

Groundwire

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Same as mine, it just looked steeper laying on its back.

I believe the steepest angle Gibby every had in the 50's was 14º, which probably accounted for a lot of broken headstocks. By the 70's they were very very flat, not as good for tone or playability, and they had a big honkin' volute, and 3 piece necks, and people still broke them with amazing regularity.
Yup. I was eyeing a 1970 SG at the same time as this and the SG looked much less solid. I think this smokes any SG I’ve played. In a perfect world I’d have liked to have the phase switch, because I love Peter Green, and I’m not totally sold on the hagstrom vibrato, but all in all, this is a rad guitar; maybe the best I own. It sounds so rich and plays great, even with those flat frets. Once I get it re-fretted, watch out!
 

Groundwire

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I just realized that it the Lefty axe wielder is to the left of the drums, he's a lot less likely to hit the cymbals than a Righty guitar player, and this headstock doesn't look like it ever hit any cymbals ;] Not that every band is the same, but;

"As a guitarist myself I like being on the left as well for the same reason. I feel more comfortable "communicating" with the band from that position."

I always play guitar to the left of the drums, and bass to the right of the drums, always have.
Yes, I always stand to the left of the drums, and I’ve never got the headstock on a cymbal. That said, my left ear has a bit of hearing loss from so many crash cymbals... Why do drummers always have to hit the crash so dang hard?!
 

Groundwire

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Anyone with experience trying 50’s wiring on one of these? I guess I can just try it. It’s a tool, not a museum piece. It’s not sacrilege to break the original solder joints, right? Right!?!
 

kakerlak

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Anyone with experience trying 50’s wiring on one of these? I guess I can just try it. It’s a tool, not a museum piece. It’s not sacrilege to break the original solder joints, right? Right!?!
People love to advertise untouched solder, but I'm not convinced you actually see a reduced sale price for reflowed solder on an otherwise all original instrument. Certainly not on anything shy of a five figure instrument, at least.
 

Guildedagain

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Dunno bout 50's wiring, but by 1972, a Phase Switch was standard on these, probably the one single biggest tone mod you can do, it puts the two humbuckers out of phase with each other in the middle position only, fantastic chewy tone with some variable twists via the volume knobs.

It was optional on S-100's before it became standard.

Don't bother with coil splitting, the sound of the full humbuckers has so much more power and resonance, coil splitting isn't really worth the trouble, besides possibly rendering a p'up inoperative in the process.

The middle position can be a bit boring, but the out of phase option will make it your favorite position on the guitar.

Schematics are available, not sure if there's a way to do it without installing a micro switch, but done right it would look like a factory installation.

Here's something I recorded on a Starfire 4 wired straight up out of phase only, and that could probably be done on yr axe simply by flipping a couple wires, like reversing the hot/cold leads on the neck p'up pot. It's actually very versatile in the out of phase position, not just a one trick pony, you can get a radically different tone just by rolling the neck p'up volume back from 10 to 8, it's like night and day, rolling it back sounds a lot less out of phase and HUGE!

 

Groundwire

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People love to advertise untouched solder, but I'm not convinced you actually see a reduced sale price for reflowed solder on an otherwise all original instrument. Certainly not on anything shy of a five figure instrument, at least.
Okay. I’m sold. I’ll try it!
 
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