Jimbos Audio ramblings

[struth]

analog magik v2 its now called... its eyewateringly expensive tho so probably better with frog unless your a business or rih

[AJSki2fly]

Sorry Jamie, I still don't get it, Azimuth as I understand it is the angle of the stylus in the groove, that is when you look at the cartridge/stylus from the front, setting the azimuth is getting the stylus perfectly aligned vertically at 90 degrees to the record, that's my understanding anyway. If you adjust VTA/SRA by raising or lowering the rear of the arm, it will change the rake angle of the stylus in the groove, in perfect world you want to get as close to 92 degree SRA as possible.

I found this very informative https://www.analogplanet.com/content...rake-angle-sra

and

https://www.originhifi.com/blog/3556...-Guide?q=35567

it changes because your headshell and cartridge are offset to the pivot point,because they are they are moving in an arc when the tonearm goes up and down .as you rightly say correct azimuth is having the sylus tip sitting perctly in the groove,im just saying that altering your sra/vta after this will throw azimuth out.
have a look on the wally tools site,top of the google search results.

The very kind Jamie sent me a PM so I could call him so he could explain. Once I got the issue it is obvious what he is saying is true. I will try and explain for all to understand.

Hold your right arm out parallel to the ground with your right palm facing the ground, then bend your elbow to make a right angle to your upper arm keeping you arm level to the ground. Now cant your right hand out at the wrist to the right keeping it parallel to the ground, think of your hand as the head shell, and you arm as the tonearm. Now here is the interesting bit. Keep your hand fixed where it is and raise you elbow vertically, watch your hand as you do so, and you should see your hand rotates with your little finger going up and your thumb going down. If you lower your elbow then the opposite occurs. This demonstrates what happens when you raise and lower a tonearm at the pivot point, it creates a twist at the head shell which will alter the Azimuth, what ever it was set to. This is not immediately obvious when adjusting the arm, but this demonstration clearly highlights the issue.

So as Jamie(karma1967) rightly says if you change the VTA/SRA of your tonearm you need to reset the Azimuth afterwards to ensure that the stylus is correctly set up in the groove.

[Jimbo]

analog magik v2 its now called... its eyewateringly expensive tho so probably better with frog unless your a business or rih

I think AOS members should buy one as a group buy and pass it round.

[karma1967]

DONT! it will drive you absolutely mental,i borrowed one a few years back and it did my head in,too many variables and constantly changing numbers you have to make sense off. if i was to buy a tool for azimuth id go for a fozgometer for ease of use.

[Jimbo]

DONT! it will drive you absolutely mental,i borrowed one a few years back and it did my head in,too many variables and constantly changing numbers you have to make sense off. if i was to buy a tool for azimuth id go for a fozgometer for ease of use.

10 folk need to throw £45 into the hat for a Fozgometer. I wonder if Andy Rexton has one?

[struth]

I think AOS members should buy one as a group buy and pass it round.

i'd rather buy the polished turd its a cant win scenario trying for perfection; just use your eyes and ears
it usually works too

[karma1967]

i think he bought one in the end.

[Jimbo]

i think he bought one in the end.

I had a feeling he might have one?

[Wakefield Turntables]

Hello Gentlemen, do you means this old thing ?



My, this thread moves quickly. Yes the Fozgometer is a piece of cake to use. It works best with detachable head shells, you can still go nuts trying to set channel seperation up on fixed head shell tonearms like my SME V-12, so, I prefer using my SME 3012. You still have to pay close attention to cartridge set up, this device very very quickly enables you to see how much of a balls-up you've made.

[AJSki2fly]

Hello Gentlemen, do you means this old thing ?



My, this thread moves quickly. Yes the Fozgometer is a piece of cake to use. It works best with detachable head shells, you can still go nuts trying to set channel seperation up on fixed head shell tonearms like my SME V-12, so, I prefer using my SME 3012. You still have to pay close attention to cartridge set up, this device very very quickly enables you to see how much of a balls-up you've made.

I’ve always wanted a shiny box with a needle to play with


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