Azimuth and antiskate on Aro

Posted by: silklee on 30 July 2016

Just got myself a preloved LP12 w the Naim Aro (w Rubikon and the tiger sKale)

Can I check if the Aro comes an azimuth nut. I can't find the azimuth nut (if there is supposed to be one) on mine.
Also when mounted with a dynavector 20x2, it seems that the antiskate is off even when the bias weight is placed on the outer most ring on the antiskate shaft. Had to use a bit of blutack to add some weight to the bias weight. Is there a heavier bias weight or some other way around it other than using blutack (rather unsightly). 
 

 

 

Posted on: 30 July 2016 by yeti42

There would have been originally but with a sKale you don't need it,

anti skate is from 1.5 (inner groove) to 2.5 (outer), the line should be horizontal to the arm. You should be able to hear which sounds best, if its the outer then try more weight, I found 2.25 worked best with 17D3.

Lift the Aro off it's cup when adjusting the sKale.

I posted this a while ago but not all the respondants got what I was on about.

https://forums.naimaudio.com/topic/a-problem-af-skale

 

 

Posted on: 30 July 2016 by silklee

Reading this https://forums.naimaudio.com/to...er-paw-skale-for-aro

In reference to what Frank Abela posted...

"On all three, the main hole is offset from centre to allow you to adjust azimuth without recourse to the standard little weight on the side of the Aro main pillar. This little weight is one of my personal bugbears with the Aro design. It was fine for a Troika, but when you consider using other cartridges, it doesn't give enough accuracy, and in some cases simply not enough counterbalancing, to do the job properly. Using the counterweight to do this seems obvious nowadays, although I suspect there is a geometric explanation why it's less desirable than a weight placed on the actual azimuth axis (i.e. in line with the supporting pillar). Still, there are other unipivots which successfully use an eccentric counterweight to provide azimuth control, so this kind of solution is accepted practice in some places."

Is he saying that we can use the sKale to adjust the azimuth on the Aro? By rotating the sKale?

 

Does anyone have the email of Frank Abela?

 

Posted on: 31 July 2016 by Chris Dolan

 Yes he is     It works because the main hole is offset from the centre 

 

Posted on: 31 July 2016 by ricsimas

As for the bias question, having to add weight beyond the maximum on an Aro using a DV20x2 (which I've had on my Aro) sounds excessive to me.

Posted on: 31 July 2016 by silklee

Are there any other adjustments that could have affected the antiskate other than just the bias weight positioning on the antiskate shaft?

Posted on: 01 August 2016 by ricsimas

Yes, there is some degree of interplay between VTF and AS.

Additionally, it's crucial to ensure the hanger is actually at the same level as the AS shaft - the horizontal part of the filament should be just that, horizontal, otherwise it will affect both intensity of AS as well as mess up your azimuth.

Lastly, I've developed a preference for the Mark Dunn method of bias adjustment on the Aro. If you don't know what I'm talking about, a quick search on these very forums will indicate that.