Aha!! It's the Jico wobble...

[goatbreath]

The Jico wobble,,it didn't happen on my very low mass Hadcock..But on my Kenwood with ADC headshell..I thought I was hearing a fluttering timing anomaly,,the Kenwood is a direct drive..Then I seen the cantilever wobbling..Hope it hasn't done any vinyl damage..I noticed it on one album,,bit didn't know that one too well,,It kept happening then going away on a copy of Kind of Blue..The flip down guard has been removed too..Things seem to be just within the green zone on the resonance calculator..HMMM ???

Has anyone experienced this and how long did it take to go away..???

[flavio81]

Which JICO stylus is this? Which cartridge?

If it's the SAS stylus (for any model), it is a very high compliance stylus and will not work perfectly on a medium mass (or high mass) arm; ideally you want an arm of 5 to 10g eff.mass for the SAS.

[fscl]

Turning back the hands (err platters) of VE time........ Lots of discussion at the time......

viewtopic.php?t=37012

viewtopic.php?t=26506

The utube video is gone, member Felix is no longer here as he experienced the weave which then went away. It seems gb, you've got time on the stylus.........

IIRC, Kermit had his V-15 Tp III mounted on another Japanese tt, a Yamaha??? with an S type tonearm......

Anyway, it appears that these tonearms and styli do not mix ....

Keep us posted gb......

Fred

[goatbreath]

It is probably too high compliance for the arm..I read it was around 22cu,,but I suspect it is higher..It's a V15 mk 3 and accompanying sas stylus..I reckon the Arm mass is a touch over 13 gms with the ADC headshell on there..It's proving a b****r to match a cartridge to this arm..I have a heavier Sumiko headshell on order to try and match it with an AT95e..It sounds bloated in the bass on the ADC..Cold and uninvolved on a slightly heavier,,but plastic and metal hybrid no name headshell..So the Sumiko is heavier again..I will try the AT95e on that..The thing is that the Rega RB250 works fine with an AT95e which is slightly lower mass than the Kenwood with the ADC headshell..could it be a resonance in the arm itself that is upsetting the AT95e..

[dlaloum]

The SAS work beautifully on my 4g Revox linear arm

On my JVC 14g S-arm it can sometimes get the wobbles... unless of course I turn on the Servo damping - in which case all is fine once more.

On a more massy arm, you would need to have fluid/servo damping, or a shure damping brush for it to work well.

I was originally told compliance was 13cu @ 100Hz, which I estimated to be around 22cu @10Hz - but subsequent measurements of resonant frequency on my S-Arm seem to inducate a compliance of 37cu ++ maybe even over 45cu.
I need to re-do these measurements to confirm - but there is absolutely no question that this is a very high compliance stylus.

[goatbreath]

My Hadcock is very low mass..It works fine on there..So it all makes sense..

[Ldg]

Goaty - you'll likely need a light arm, or to use some arm damping, especially on a mid-mass arm to make this stable.

DL, hopefully the penny might just drop about the uselessness of trying to convert hetween compliance@100Hz and compliance@10Hz by guessing a factor ? This is yet another hopelessly inaccurate example, it seems.

[goatbreath]

So now I'm scratching my head at what the true compliance of the Audio Technica AT 120e is...I'm also beginning to suspect different headshells have different tonal signatures too..

[Ldg]

So now I'm scratching my head at what the true compliance of the Audio Technica AT 120e is...I'm also beginning to suspect different headshells have different tonal signatures too..

Hi goaty. According to measurements posted on Paul Miller's site, AT120E works out at between 35cu and 40cu at 10Hz. Yet another 'exception'......is anyone unconvinced Yoda is right yet ?

[smeg68]

I have NEVER understood why this subject gets so much discussion. It seems as obvious as the nose on your face to me - The V15III with either OEM or SAS stylus is a very high compliance cartridge and if you put it on anything other than a very low to low mass arm (or a suitably damped one) you are going to risk resonance wobbles. People then still try to fit them to unsuitable arms and bingo! Another pointless discussion thread.

*Facepalm*

[goatbreath]

I have NEVER understood why this subject gets so much discussion. It seems as obvious as the nose on your face to me - The V15III with either OEM or SAS stylus is a very high compliance cartridge and if you put it on anything other than a very low to low mass arm (or a suitably damped one) you are going to risk resonance wobbles. People then still try to fit them to unsuitable arms and bingo! Another pointless discussion thread.

*Facepalm*

Sorry I am so utterly stupid SMEG68 and you are obviously so much better than me to speak down to me like that,,obviously this forum is not for morons like me....Does it state how high compliance the Jico is,,no..Or are you such so much more intelligent than all the people who start these threads,,that must be it... ..Sorry for being so thick mate,,I won't ask questions to try and gain knowledge again as you obviously don't approve..I apoligise for my thickness spoiling the forum for you..If you don't like the thread,,then maybe don't respond on it.Rather than feeling the need to insult people. Have a nice day...

[goatbreath]

Oh and the thread wasn't pointless for me..The Jico is obviously much higher compliance than I read,,I have now found this out..Yet it tracks up to 1.5 gms..Not 1.25 like my original V15 he stylus,,so I thought it would be quite a bit lower compliance..Judging by this it was actually in the outer perimeter of the safe resonance zone...Anyway..I'm terribly sorry to be so stupid mate..You are obviously entitled to facepalm everyone being so superior and knowing everything..It must be difficult being so clever..

[smeg68]

Oh put your handbag away luv.

[goatbreath]

Oh put your handbag away luv.

Why don't you get off my thread and go and troll somewhere else...There's no need to talk to people like they are garbage...Firstly,,secondly,,internet bullies are always pussies in real life...I bet you are a total wimp..