Sony PUA 7 to re-wire or not

Your arm is not the PUA-7 but a simplified cheaper version with different base and without proper armlift sony designed for their best models. I must admit the armlift mechanism on the original stand alone PUA-7 is one of the best ever (i own many tonearms but none of them have such precise armlift, this is very important to have precise armlift, especially for expensive cartridges with delicate cantilevers). There are many reasons why the arm removed from PS-X70 is 3 times cheaper than original Sony PUA-7 made for all turntables as the separate unit. The stand alove version is better, it’s rare and hard to find, expect to pay over $1k if you looking for a mint condition PUA-7, while the simplified version is very easy to find and not rare at all.

Knife-edge bearing must be avoided, some modern cartridge manufacturers do not recommend to use knife-edge bearings with their cartridges.

You can buy Cardas Litz tonearm wires for about $50 set. It’s absolutely crazy to pay 200-300 quids for 4 internal toneam wires. It’s a rip-off, especially for such a cheap version of Sony tonearm. Normally high quality vintage tonearms will impress listeners with stock internal wiring.

It is not necessary that you will prefer silver wire over copper wire, just because someone said silver is better.

How many people on here own the original stand alone PUA-7 tonearm ? I couldn’t find anyone who can comment on anything related to this particular model, except for the links to the vintageknob website.

My Sony PUA-7 is fine with stock internal toneam wiring. 

Simply in the interest of helping the OP who apparently is learning about tonearms and tonearm wire options, I would point out that no one has said silver is better. The AN wire is a fantastic wire; it simply happens to be silver. There are great copper wires. In my experience, the AN is an infinitely better wire than the Cardas, which happens to be copper. It is also an exceptionally flexible wire which can only benefit a tonearm with possibly not the greatest bearings. Worth the extra money? Personal call. I think a better question is will there be an audible improvement in sound? I would say, definitely; and if one considers what many spend two hundred bucks on with very questionable results.....

The issue when 2 arms are actually not the same
can also be found with the Micro Seiki MA-505.

When MS sold table models including this arm 
it was actually not the same arm when bought separately.

No guessing which one is superior.

Dear @totem395  : Could be with MS but not with this Sony tonearm where in this link you can read is the PUA-7. The only differences with the stand alone version is the tonearm mount base and the arm lift and that's all, the tonearm design is exactly the same no doubt about. The information in the link is very clear and only the Sony tonearm designer could says a different " tale ":

http://www.thevintageknob.org/sony-PS-X70.html

as @lohanimal  pointed out his tonearm was lifted from that Sony TT model.

Btw, @frogman is rigth the AN is the best internal tonearm wire we can use but before pull the triger the OP needs to be sure the tonearm is in perfect operation condition and if it's then is worth to invest in the AN rewiring. All vintage tonearms must be up-dated with a top today internal re-wiring due that the oldest original wire is totally outdated after 20-40 years. Certainly in those old times just does not exist a wire with the quality level as the AN, no way.

As afact the internal wire quality level in any tonearm design is extremely critical to preserve " intact " the valuable and sensitive recorded signal information that the cartridge pick-up from the LP.

We all know that at each single link in the whole system audio chain that the cartridge signal always is more or less " heavy " degraded so we have to take care at each single link and we have to remember that after the transducer/cartridge the first degradation link is that tonearm internal wire ( along the headshell wire/conectors. ) and the audio signal that must pass through the tonearm internal wire has to run on it not for 3cms. but a lot more and at each fraction mm. the signal is suffering degradation and we don't want that and need to put at minimum that signal degradation.

AN makes a paramount quality level differences for the better. Yes, manufactured with silver that's way better conductor than cooper and that at that extremely critical link we need nothing but the best because the information we lost in that internal wire we just can't recovery in any way, it's losted for ever ! !

R.

How many people on here own the original stand alone PUA-7 tonearm ? I couldn’t find anyone who can comment on anything related to this particular model, except for the links to the vintageknob website.

I have the rare PUA 7 already for a different months, but I have not yet had the opportunity to install it on a plinth and connect a cartridge.
I prefer not to pronounce incorrect information until the time of the test.