Sony PUA 7 to re-wire or not
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All vintage tonearms must be up-dated with a top today internal re-wiring due that the oldest original wire is totally outdated after 20-40 years.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. |
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I could not find ANYTHING valuable about Sony PUA-7 on audiogon for many years, i think we have only 2-3 users of the real PUA-7 here. I have asked everyone for an opinion about PUA-7 but no one can answer, never! So i bought the arm and I have this arm right now on my turntable. The arm removed from the SONY turntable is not the same and in fact a different simplified (cheap) version compared to the stand alone PUA-7 version that was ONLY available as a separate unit for high price at the time it was made. Here is the arm lift mechanism i have mentioned before, the best armlift ever, anyone who tried can confirm! SONY PUA-7’s geometry and alignment method is different from conventional Baerwald, Lofgren, Stevenson. The original tamplate i got with my PUA-7 is here. While the Mexican prefer to bla-bla-bla about cables that will make a big difference, let’s face the facts that the two version of the PUA-7 arms itself are very different and the market value for these arms are totally different (there are the reasons for that). Anyone can buy and compare these versions to make sure. I would prefer to discuss new facts about the difference between the arm installed on automatic sony turntable and the high-end separate unit designed for much better turntables (from the different manufacturers), but not an old article from vintageknob or vinylengine that everyone seen years ago. @totem395 The issue when 2 arms are actually not the same Thanks. Exactly what i’m trying to say. It is so strange that we have to point people to the simple facts. I had the arm designed by Micro Seiki for Luxman, my version was a separate unit TA-1 (with removable armtube and tonearm stabilizer) and it was a way different from the cheaper TA-1 that Luxman offered with their turntables (with non removable armtube and without stabilizer). It is so obvious that for a stand alone version a manufacturer will do the best (different materials, different features, just overall a much better arm) for higher price of course. Micro Seiki (made the arms for Luxman) or SONY with two different version of PUA-7 is a good example. Below is the only comment from anothe user i could find on audiogon: @radicalsteve Also the Sony PUA-7 and PUA-9 have a similar design and the PUA-7 is a ridiculously good sounding arm for the money, I have not heard the PUA-9 and would be interested to know if anyone else on this thread has heard that arm. Also the Ikeda arms use a rubber (or similar compound) O-ring between counterweight and arm tubes, and probably there are other designs like this out there? |
