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
Dertonarm,

Any news about the reticule with black markings for silver arms? Looking forward to it.
Hi Jazzgene, the "black" reticule proofed much more difficult to produce in equal quality than estimated. This is not laser etched, but has to be printed. We finally got a perfect inspection sample this week and will get the full production run next week.
Best,
D.
I just aligned my EMT 997 tonearm (NOS old design) with the UNI-Pro's 997 template to reach the full EMT geometry. I compared with common two Null-Point protractors and also with the one of EMT.

I did not reach such an exact and precise alignment than with the UNI-Pro. When I switched between Baerwald IEC and (for Monos) Baerwald DIN and back again to EMT you only have to check if you have put the Micrometer screw again on the right position.

best & fun only - Thuchan
Dear Tuchan,

Please excuse my ignorance, but how does one align EMT arms?
I have a 929 with TSD15 mounted on 930 and have been wondering if there is anyway to check/correct the geometry?

Thank you!
--j
Just received it, very easy to use and fuss free. Another step forward for me. I would like an arc for confirmation on overhang though.
Dear Bydlo,
you may align EMT arms with the EMT alignment gauge. If you send me an e-mail I will answer and attach it. The better and more precise alignment you will reach with the UNI-pro coming with the 997 or 929 inlay. This is what I did. You can see it on one of the images on my page.

best & fun only - Thuchan
Ah, now I've got it Thuchan after seeing the pic (but the email is sent anyway :-)). I've missed that you use a different cart in the EMT shell. I thought you were aligning Tondose. Sorry for bothering
you&thanks for kind answers :-)

Best,
--j
Dear Bydlo, the cart in the EMT shell is a modern EMT cartridge, a JSD 6 made by EMT Studiotechnik GmbH. As I like the Tondosen too, especially the new designs, this one is superior - maybe with the exception of the Lzi but this is carrying a SME shell.
You may align also Tondosen with the EMT gauge or the UNIprotactor.

best & fun only - Thuchan
I've been spending some time with my relatively new UNI-Pro this weekend, aligning an A90 on a Graham Phantom II and a Benz Ebony LO on a Clearaudio Universal arm. I also a have a Wally and MintLP for these arms, respectively. After some initial getting-used-to, the UNI-Pro is simpler and quicker to use and I prefer the results. Checking UNI-Pro Baerwald against the arc protractors, the alignments are not identical despite the fact that both arms (and their protractors) are based on Baerwald geometry. This discrepancy gave me some pause at first, since I've always relied on the arcs. However, I find the sound is notably better using the UNI-Pro. It's deeper, cleaner, more detailed, more relaxed. I'd conclude that means the alignments using the UNI-Pro are more correct. I should add that I prefer the Baerwald template to the UNI-IEC template. It just sounds better to me. Nice job, Daniel!
Wrm57,
Which UNI-IEC template did you try? And was the Baerwald template IEC or DIN? (or other?)
Wrm 57, There is this German saying: 'If theory and practice coincide then they are probable both false'. However in theory there should be no difference between the
Mint Lp and the UNI-pro in your case. So, I assume, you like Dertonarm more then Yip ?

Regards,
My templates are labeled UNI-IEC and IEC Baerwald. The former is Daniel's recalculation of the Baerwald geomtery, as I understand it.
The Baerwald alignment using the UNI-Pro sounded better on the Graham than the Wally and better on the Universal than the MintLP. It also sounded better than the UNI-IEC alignment. At some point, I'll go back and realign again using all and recheck, but I was pretty careful the first time through the process, so for now I'll just enjoy the music.
Wrm57,
Thanks. Not sure what the UNI-IEC is... I am curious. I will have to dig further.
Dear T_bone, dear Wrm57, let me add some technical parameters to the discussion.
The UNI-IEC features zero points at 116.39 and 67.44 mm radius (very close to what T_bone once named "Dert67" ... ;-) ...).
After radius approx. 117, this alignment has approx. 20 % less tracking distortion due to tangential error then Baerwald IEC and is very similar to Baerwald curve after radius 66 mm.
A very suitable alignment if most of the records played are made past 1982 and feature rather long wax/lead out groove.
UNI-DIN features zero points at 109.52 and 63.49 and is ideal suited for stereo records made in the early days with short lead out grooves/grooved area running close to the label.
Both alignments to pay attention to certain aspects of stereo stylus with decreasing radius and concentrate the focus of minimized tracking distortion on the last 2/3 of the groove.

The long awaited UNI-P2S will finally (sic ...) be introduced next week. It proofed much more tricky to integrate it's function with the UNI-Protractor, but finally I succeeded and will bring something rather unique in both - function and precision.
Cheers,
D.
Dear Ecir38, yes - the UNI-P2S is a stand-alone-device.
It features 0.05 mm accuracy and can measure mounting distance up to 15" or 38 cm. It has some unique features of it's own.
The UNI-P2S nevertheless can be used in close conjunction with the UNI-Protractor and offers then direct measurement of mounting distance with 0.05 mm accuracy during alignment of cartridge.
In other words - you can read down the exact mounting distance every moment during actually aligning your cartridge.
It was quite some work to design the P2S so that it now meets the universal approach I was longing for.
I will introduce the UNI-P2S next week and it will ready for order and immediate shipment by end of July 2011.
Cheers,
D.
Where is the UNI tractor available? The listing here has expired. Is this because it's back ordered or between production runs? The Mint is cartridge specific when used on SME tonearms. I assume the UNI would be a good alternative and not cartridge specific.
Dear Sonofjim, right now the UNI-Protractor is readily available and ships within 8 working days following order.
Due to very good sales in the 1st and 2nd full production run we decided to produce some "overstock" and can supply limited quantities now much faster than before.
If you are interested, I will gladly send you the full pictured 24-page manual as PDF-file to get a comprehensive impression about the functions and options the UNI-Protractor does offer.
Best regards,
Daniel
The P2S addition makes the UNI-protractor really universal. It took a while Dertonearm! but the solution you finally came out with is just a sensation - I usally don`t use such extrem words.
I was always trying to build something by myself - you will remember. Oh my god! Really good things may take a while! I tried it on my TTs and arms and it is such an easy job using all different tonearm inlays while adjusting tonearm length and exact needle point on the spot by 4 digit precision.
Well Done!
As I am also an "image guy" I put one onto my page.

best & fun only
Does anybody know the right parameters for the VPI Memorial 12 (original) tonearm? precise information regarding any and/or all parameters will be appreciated. I have never been able to achieve the arm's offset with the cartridge which makes me think I have room for improvement. Please note that this arm was provided with no information, VPI does not publish it. Also, newer versions have "enjoyed" the attention of a few aficionados who have rendered the goods, but... I don't think the wands geometry is the same between the old one and the newer ones.