Have you any numbers for the accuracy of The Ultimate Analogue Test LP? I have always had problems with test LP accuracy especially with the noise bands where white noise wasn't properly white, pink slightly brown. I also don't know how good the level bands are. I bought it as I found the HFN LP too obviously flawed, and in correspondence with the producer, his view was that accuracy wasn't important as it wasn't meant for test equipment, just to be used by ear. Not hugely impressed by that.and even then not really very good in absolute terms.
That's what I use it for too, not progressed past that.That is a real surprise to me serge...- - - Updated - - -
Back on topic:
Follow the instructions on the back, the tracks for bias are easy to use. If you hear breakup of the sound in one channel adjust the bias so it moves over or goes. You will hear if adding or removing it makes it better or worse.
I find the phase check and left right very useful every time I change something just to check.
Bias is require because the friction acting on the stylus from the two groove walls as well as the resistance caused by the groove modulationtends to pull the stylus in the direction of rotation of the LP. As the arm has an offset, this pull creates a torque which pulls the arm into the centre. The anti-skate is a torque in the opposite direction which substantially cancels the torque due to the stylus-groove friction. A blank disc will have far less friction with the stylus and won't have any modulation so bias/ anti-skate set up with a blank disc will be much too low.I have heard and read that using a blank groove on test records for anti-skate calibration is not an accurate method. Certainly I've never had a satisfactory outcome on my (admittedly very old) Shure test record. Not sure why this should be, mind. I'm sure Serge will be able to confirm or dispel this.
+18 is an extreme test, and I'm generally happy with +16, although my Shure V15 would usually manage +18.I just used mine again yesterday, as I always do when I change something to my vinyl setup. I agree, forget about the 4th +18db track, but do you guys actually pass the first 3 with absolutely no buzzing? I can get passed the first 2, but not the 3rd with no buzzing.Perhaps I should take a look at my VTA too, because my system can be prone to sibilance too?
Agree I found the 4th is not do-able on any cart i have tried. An AT OC-9 passes the other three, whereas the third test usually gives other carts problems. But the OC-9 is a known good tracker, on some difficult tracks, the stylus can literally waggle away as it tracks the groove where on others the cart body moves instead.I just used mine again yesterday, as I always do when I change something to my vinyl setup. I agree, forget about the 4th +18db track, but do you guys actually pass the first 3 with absolutely no buzzing? I can get passed the first 2, but not the 3rd with no buzzing.