How to get 100 accurate azimuth?

Freshpuma, there's lots of debate about the best way to adjust for optimum azimuth. Two schools of thought are 1) adusting for same output in each channel or 2) adjusting for minimum cross-talk in each channel.

The Hi-Fi test record and mono-switch process is of the "adjust for same output" school. The problem with this process is that it does not take into account potential differences in output from the two channels of the cartridge: you can end up way over-compensating if there is simply a channel-channel output (volume) difference. The same is true for any of the routines that sum both channels to mono looking for a null output, or for listening to a mono record for strong center fill.

Adjusting for minimum crosstalk in each channel is probably more reliable. This has been discussed at length in the Audio Asylum Vinyl forum and I'd recommend the following two links for reading on the subject:

http://www.audioasylum.com/audio/vinyl/messages/187319.html

http://www.audioasylum.com/audio/vinyl/messages/74644.html

Then there's always the "visual-check-with-a-mirror" approach, simply looking for the canitilever to be vertically positioned, followed by listening and adjusting based on what one hears. That's always been my approach, and it's worked surprising well for me over the years.
.

You can't.

Nor is that level of precision necessary.

I use the Wally Analog shop, and even with that, at some point you have to say "good enough".

As Riffer says, 100% perfect azimuth is impossible, unless by chance your cartridge is 100% perfect. Since no cartridge is...

That said, I agree with Rushton's excellent post. I own a Wally Analog Shop, but over the years I've found I can adjust by ear just about as closely as the Analog Shop can measure, and enjoy listening to music while I do it.

Hi Rushton

Thank's a lot. Seems I've got some reading to do:-)

Theo

Freshpuma, you're welcome. There's a wealth of discussion. Just be careful to sift through it with an appropriate "hooey filter" in place. :-)