Do I need an overhang gauge, in addition to a protractor to position cartridge correctly?

If you have a removable headshell and use the protractor to set up your cartridge perfectly and are happy with the alignment than here is a tip.Measure from the end of the headshell seat, including the rubber ring to the stylus tip. Record that measurement.Now if you want to install another cartridge in another headshell just duplicate that measurement and your golden.
Note: Cartridge must be aligned straight in the headshell for this to work, if your cartridge is skewed at an angle it won't give you the proper alignment.This is the principle behind the cartridge overhang gauge that was provided with so many TT's.

BillWojo

rauliruegas

Btw, @cleeds  :
 Overhang is the distance between the center of the TT spindle and the stylus tip settle by the protractor. It's that small distance in between.

Fair enough, although I think neither of us stated it perfectly clearly. ; |
Overhang is the small distance (about 16mm in the OP's case) that the stylus point "overhangs" the spindle. As I noted, the purpose of overhang (combined with offset) is to reduce tracking error.

Oddly, there are "underhung" arms, which while subject to greater tracking error, do minimize antiskating problems. Some users report excellent sound from them. I've never heard one, but I admit I'm curious.

@rauliruegas and @cleeds
What is your opinion about this statement from another audiogoner that was posted last year?
 

Vinyl heresy-overhang induced distortion is not that important

I have learned and am of the opinion that the quality of the drive unit, the quality of the tonearm, the quality of the cartridge and phono stage and compatibility/setting of all these things (other than setting overhang) and the setting of proper VTF, VTA, SRA, and azimuth are far more important than worrying about how much arc-induced and overhang- induced (the two are related) distortion one has. I learned this the hard way. I will not go into details but please trust me-I am talking about my new ~15K of turntable components for the deck itself and excluding cartridge and phono stage. I have experimented with simply slamming a cartridge all the way forward in the headshell, placing the cartridge mid-way along the headshell slots, and slammed all the way back, each time re-setting VTF, VTA, SRA, and azimuth. I would defy anyone to pick out the differences. I have 30K of tube separates, a Manley Steelhead, and DeVore O/93’s. I submit that any differences in distortion due to sub-optimum arcs and deviations from the two null points and where they are located (those peaks in distortion) are masked several times over by distortion imposed by my tubed gear and my loudspeakers. To believe that your electronics and loudspeakers have less distortion than arc-induced distortion is unrealistic. I have heard startling dynamics, soundstaging, and detail with all three set-ups. It is outright fun to listen to and far preferable to my very good digital rig with all three set-ups.
My point is that getting perfect alignment is often, not always, like putting lipstick on a pig, I think back on my days on owning a VPI Classic and then a VPI Prime and my having Yip of Mint Protractors fashion custom-made protractors for each of these decks and my many hours of sitting all bent over with eye to jewelers loop staring down horizontal twist among parallax channels and getting overhang on the exact spots of two grids and yet never hearing anything close to the level of sound I get now. Same cartridges, same phono stage, only my turntable/arm combination has changed. I kept thinking the answer had to be in perfect alignment when it was clearly everything else but.
Thoughts? I am sure I will get all kinds of flack. But for those that do tell me I am nuts, try my experiment sometime with a top-tier deck/arm combination and report back.

yogiboy

What is your opinion about this statement from another audiogoner that was posted last year? 
... the quality of the drive unit, the quality of the tonearm, the quality of the cartridge and phono stage and compatibility/setting of all these things (other than setting overhang) and the setting of proper VTF, VTA, SRA, and azimuth are far more important than worrying about how much arc-induced and overhang- induced (the two are related) distortion one has. I learned this the hard way. I will not go into details but please trust me ...

Without some details, it's difficult to respond.

 I have experimented with simply slamming a cartridge all the way forward in the headshell, placing the cartridge mid-way along the headshell slots, and slammed all the way back, each time re-setting VTF, VTA, SRA, and azimuth. I would defy anyone to pick out the differences.

Perhaps "slamming" is just a figure of speech here.

 I have 30K of tube separates, a Manley Steelhead, and DeVore O/93’s. I submit that any differences in distortion due to sub-optimum arcs and deviations from the two null points and where they are located (those peaks in distortion) are masked several times over by distortion imposed by my tubed gear and my loudspeakers.

Maybe he's right. I haven't heard his system.

My point is that getting perfect alignment is often, not always, like putting lipstick on a pig ... the answer had to be in perfect alignment when it was clearly everything else but.

You can measure the distortion caused my an improperly aligned phono cartridge and it can certainly be audible, although more with some LPs than with others. It's especially noticeable in the higher frequencies.

But regardless of that, it's important to have proper alignment if you also seek minimum wear on the both the stylus and your LPs.

Dear @yogiboy  : Everything of the basic parameters in the cartridge/tonearm/TT set up is important to do it.

Any pivoted tonearm design has a tracking error due that can track/move it tangentially during play back, it's inherent to any pivot normal tonearm designs.

That that gentleman can't detect a different kind of sound in between those 3 cartridge headshell positions he mentioned does not means no one can detect it and does not means he is rigth because he is way wrong no matters what.

An accurated/precise cartridge/tonearm alignment is a must to have to mantain at minimum the tracking error and tracking distortions levels along the LP recorded surface during playback.
For detect overhang set up mistakes we need some kind of characteristics: very good to high room/system resolution, very good experienced " ears ", a " bullet proof " evaluation/comparison system overall process where we use always the same LP tracks ( several LP's. ).

I know I can detect an overhang set up mistake because I learned years ago just by accident: I mounted a cartridge 2-3mm additionals to the correct overhang and in my first listening LP's with that failure in the overhang set up I like what I was hearing till I took in count that something was wrong down there because even that the high frequency range was really good the other two frequency ranges were not.
So I check the set up and noted my error then fixed and problem solved.

@cleeds  yes, we can detect it through the high frequency range but we have to have really very good training about.

I agree with that gentleman that our electronics or speakers or room develops higher distortion levels than the overhang levels but that does not means we can't detect it.

Now, could be that some peoplecan like what they are listening the more with overhang error that with the rigth overhang set up but this is another kind of matters.

R.