VTA Adjustment


Thanks for all the EXCELLENT answers to my last thread. Now another question....what is VTA? Vertical tracking adjustment? Second question, does a Nottingham space deck (with space arm) have a VTA adjustment? The documentation mentions only "playing weight", is this the same thing? The documentation that comes with the deck is absolutely horrible, two confusing paragraphs and a hand drawn diagram. The assembly instructions that came with my 2 years olds bicycle manufactured in china were much better.
mythtrip

Showing 2 responses by 4yanx

Bwaahahahah, Ohlala, I'm with you 110%. I have come to believe that ASL is an acronym for Arrogant, Stupid, and Laughable. But then, I don't have any strong feelings on the matter. ;-)

Mythtrip, the adjustment of VTA on the Spacearm is EASY. First, loosen the two allen set screws in the collet ring. The smaller of the two allen wrenches that should have come with your Spacearm(deck)is the appropriate size. The collect ring is the shiny round ring that is just below the base of the tonearm pillar and it keeps the tonearm form moving up and down. Now, you have either an early model or late-model Spacearm.

If you have the earlier arm, you can raise or lower the arm by hand to change VTA. Just tighten the allen set screws when finished. If you have this arm, I ‘d suggest doing something like Marty's approach which entails laying a deck of cards under the arm, using as many cards as it takes to fit between the bottom of the arm and an old LP. Then add or subtract cards depending on if you want to go up or down. By knowing the number of cards you can always get "back to square one", if needed.

If you have the later version of the Spacearm, you will see a vertical, threaded rod just to the right of the arm pillar. It has an allen set in the top of the rod that is the same size as your wrench. Again, loosen the collet screws just enough to provide movement. Then, you can adjust the VTA in very minute increments by turning the threaded rod one way or the other. When finished, tighten the collet screws and you are all set. Remember to check VTA after changing tracking force, anti-skate, changing the platter mat, etc. etc.......

I think it is correct to assume that Nottingham assumes (rightly or wrongly) that one has mor ethan a working knowledge of TT setup with respect to the conent of their documentations. Odd, too, as it is an easy table to setup but the lack of instructions may deter, or at least frustrate, some relatively inexperienced analog users.
Mythtrip, you haven't contacted me as Brulee volunteered :-) but I will add one more thing with respect to VTA. There should also have came with your Spacedeck a short spirit level. Carefully place this in line with your arm on top of the headshell and lower the arm via the queuing device onto an old record of an "average" thickness. You can tell by the level whether your arm is "ass up" or "ass down". For my cartridge, Shelter 501, the best VTA setting is just a cat whisker low in the rear. A perfecetly level VTA is a good point from which to srat. Make minor adjustments up and down to dial in your pickup.

Also, ASL will tell you that Nottingham recommendeds a spindle to pivot distance of 210mm for the SPACEARM. Experience shows that MANY pickups will not meet the null points during alignment if the distance is set thus. After extensive trial and error, I have determined, and Wally of Wally Tractor fame agrees, that the proper spindle to pivot distance for the SPACEARM is 206mm.