Uni-Protractor Set tonearm alignment


Looks like Dertonarm has put his money where his mouth is and designed the ultimate universal alignment tractor.

Early days, It would be great to hear from someone who has used it and compared to Mint, Feikert etc.

Given its high price, it will need to justify its superiority against all others. It does look in another league compared to those other alignemt devices

http://www.audiogon.com/cgi-bin/cls.pl?anlgtnrm&1303145487&/Uni-Protractor-Set-tonearm-ali
downunder
Dear Henry, knife-edge bearing tonearms do not like cartridges which do transfer a lot of energy into the armwand. Thus SAEC tonearms - despite the fact that some do sport a pretty high moving mass - in general do fare better with cartridge featuring high compliance.
So expect your WE-308 to perform pretty well with most of your MMs, but not with a FR-7.
As I still do favor LOMC and some with really low compliance, the not optimal energy handling abilities of the knife-edge bearings were abandoned in an early design stage.
To achieved my goals I needed very hard and rigid bearings and an armwand which can transfer energy ASAP without torsion or inner resonance.
Cheers,
D.
Dear Daniel,
Interesting?
How about unipivots?
Do they like low compliance cartridges in your opinion?
Cheers
Henry
Dear Henry,
there is - IMHO ... ;-) ... - a direct correlation between low compliance and the amount of energy transferred into the tonearm. Certain bearing principles can handle that energy better - others fare less well.
This is kind of a sensible topic - I am a bit reluctant to discuss toneram bearing principles in public, as I do not want to step on any toes.
If o.k. with you, I will address your question in detail tomorrow in a PM direct to you.
Cheers,
D.

"Perhaps you should start a specific thread about the different SME arms or do a search in the archives. There is lots of information regarding these arms. You could also email Sumiko, the US importer."

Peterayer,

I am aware of all that. I have been participating in online forums since the early 80's when we had to dial in on 300 baud modems. I thought this illustrious group could help me avoid sorting through much irrelevant material. If you are an admin here perhaps you can give me Audiogon search tips. Even Google gives lots of trash. Although their recent changes have helped.

Robert

"I haven't worked with the SME 309 yet"

Dertonarm,

Thanks for your comments. Come to Houston and you can re-setup mine when it gets here.

Y'all be cool,
Robert