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  1. J.R. Boisclair

    Analog Magik

    If you use a decent scope and follow my instructions on how to control your approach angles (read the WallyScope instructions), you can get very tightly controlled SRA measurements. My own error using the WallyScope is +/-0.35 degrees. Since neither SRA nor VTA are very sensitive parameters to...
  2. J.R. Boisclair

    Analog Magik

    Gents, a few points that might be helpful to you: 1. The test track for "VTA" is horizontally modulated (if memory serves me correctly) which means is it not useful for measuring VTA. SRA perhaps, but not VTA since VTA is only sensitive to vertical modulations. You cannot measure both from the...
  3. J.R. Boisclair

    Why is reading crosstalk so inconsistent across the different tools?

    I haven’t done a controlled variable test of this hypothesis. I think it is worth inspecting
  4. J.R. Boisclair

    Why is reading crosstalk so inconsistent across the different tools?

    Not totally random at all. Results are simply explained by variation across a normal distribution curve. This means that if you took the average results over a large number of test records, you would be pretty damn close to perfect. However, you aren’t collecting enough information if you’re...
  5. J.R. Boisclair

    Why is reading crosstalk so inconsistent across the different tools?

    Oh, sorry! I guess I did misunderstand your question. You found using the same record gave varied results over your measurement methods. I can only guess: variations in averaging methods across the three measurements is most likely answer, filtering slopes will be different as well. That will...
  6. J.R. Boisclair

    Why is reading crosstalk so inconsistent across the different tools?

    If you read my latest blog post on my visit to Agnew Analog in Greece you’ll begin to see what the problem is. In short: lack of control at time of cutting with respect to cutting stylus symmetry, stylus insertion and cutterhead angles. BEFORE you ask why we bother with targeting optimal...
  7. J.R. Boisclair

    Using Wally Tools

    Based upon your cartridge height, I can see we will be drawing down your VTA quite a lot! I have analyzed somewhere around 60-80 of those carts and yours is a bit tall, suggesting a steep cantilever assembly insertion angle.
  8. J.R. Boisclair

    Using Wally Tools

    Actually, the VTA is arguably more important than SRA (can't know yet as it's never been studied with any scientific rigor) and it is MUCH more defensible in terms of optimal playback target to hit.
  9. J.R. Boisclair

    Using Wally Tools

    I am happy to help! Thanks for the kind words. If you like the performance now, just wait until you hear how your cartridge sounds following analysis!
  10. J.R. Boisclair

    WallyTools Tractor

    Pivot to spindle PLUS overhang = effective length.
  11. J.R. Boisclair

    J.R. we gotta talk about WallySkater

    You are most welcome! Enjoy the sonic performance of having a symmetrically compressed damper.
  12. J.R. Boisclair

    J.R. we gotta talk about WallySkater

    I have a pretty good guess I know which tonearm brand behaves like this. ASSUMING you are controlling for cartridge location when performing these multiple tests so as to eliminate the possibility that the arm has variable bearing resistance depending upon where along its travel arc it currently...
  13. J.R. Boisclair

    J.R. we gotta talk about WallySkater

    Hi Tony. Next time give me a head's up if you are hailing me by using the @J.R. Boisclair doo-hickey. I found this note from you by chance as I don't often have time to come lurk here. Alternatively, you can email me directly via the website. I respond pretty much 7 days a week. I understand...
  14. J.R. Boisclair

    The importance of measuring VTF at the right height when using the Kuzma 4-point etc

    I suggest counterbalancing that scale surface. The strain gauge may throw off bad readings when it is subject to rotational torque force as your setup surely will do more than the original design. Other than that, you are perfectly right to want to improve what you have for a tonearm that has...
  15. J.R. Boisclair

    WallyTools Tractor

    By the way, why not simply reach out to me via the website? I am available 7 days a week to support WallyTools owners for all manner of analog related issues.
  16. J.R. Boisclair

    WallyTools Tractor

    The reason for small differences like that you are referring to is because WHICH alignment pattern you choose (Loefgren, Baerwald, etc.) has not been standardized. On the WallyTractor, the nominal dimensions of the arcs are MOSTLY quoted in Baerwald, but each arc is a SET of two options -...
  17. J.R. Boisclair

    Anti Skating?

    I agree! I'm just stating something that might not be obvious to many in an effort to be helpful.
  18. J.R. Boisclair

    Anti Skating?

    Yes, you can find the peak performance by ear for AS, but the very process assumes you aren't starting with a problem you don't know you are fighting, such as high frictional forces or variable horizontal torque forces across the platter surface area caused by such things as the tonearm wires or...
  19. J.R. Boisclair

    Anti Skating?

    Dunno about your arm, but on my Kuzma arms the force vector is more than 20 degrees off of the central axis of the fingerlift. Just something to keep an eye on.
  20. J.R. Boisclair

    Anti Skating?

    You'll have to verify that the strain gauge is not giving off false readings due to new vector forces, so you still need something "true" to reference its reading against when the scale is used in an orientation such as you have it there. Assuming you've managed to get through that matter, you...
  21. J.R. Boisclair

    Using Wally Tools

    For what it's worth, the claim in the advertisement that there is a long wait for WallyScopes is not at all true. The longest anyone has waited for ANY "standard issue" WallyTool is about 10 days - and I can count those events on a single hand. I keep everything in stock at all times, usually...
  22. J.R. Boisclair

    Using Wally Tools

    I will be doing a video on this in the near future. This "mistaken measurement" issue is true to greater or lesser degrees with all setup parameters and is why relying upon a test record for all setup parameters makes it such an iterative approach where improvements can certainly be made but...
  23. J.R. Boisclair

    Using Wally Tools

    By the way - and as a reminder - as a WallyTools owner, you have pretty much 7 days a week access to my support as well. Reach out to me if you have any analog issue. I certainly am not an expert on ALL vinyl playback matters, but I'll let you know when you've hit my limit of comfort in any...
  24. J.R. Boisclair

    Using Wally Tools

    We've done several hundred hours of multivariate testing (think: test record) in 2023 and have come several conclusions. One of them is: you aren't measuring what you THINK you are measuring!
  25. J.R. Boisclair

    Using Wally Tools

    We have analyzed many laboratory test records (NAB, DIN, CBS, etc.) and have learned the futility of using a test record as a reference for playback alignment. For example, the CBS test record with square waves had a 3.5 cutting zenith error. You can see this in my latest video posting. Even...
  26. J.R. Boisclair

    Using Wally Tools

    Crazy how groove noise drops when the zenith error is corrected, eh?! Did you notice increase in overall clarity and "focus" of the soundstage as well? Only 12% of cartridges have 0.5 degrees or less of zenith error. Few people have heard this effect before!
  27. J.R. Boisclair

    Using Wally Tools

    I have already filmed a new instructional video series for the WallySkater. It is in editing now. Hopefully it will clear up any confusion, but you can certainly start the static friction test no matter where the yellow and blue line are with respect to each other with the new hangar. I have...
  28. J.R. Boisclair

    Using Wally Tools

    Interesting. Haven't seen this before. What did you measure the static friction of the arm at the inner and outer areas of platter?
  29. J.R. Boisclair

    Using Wally Tools

    Thank you for your thoughts! I appreciate that. Not sure why a curved finger lift would cause a difference in the measurement of horizontal torque force. We only need some place to affix the tonearm to the string and where it does so is irrelevant as long as it is not more than about 15mm...
  30. J.R. Boisclair

    Installed Dedicated AC Circuits - FINALLY - and the results...WOW!

    It wasn't the wire itself that was special (it was basic 10ga romex). I think the magic was in how Rex made sure the H, N, G were all landed at the proper location, that there weren't any ground loops inside the panel, the location of the breaker, removal of some things the last electrician left...

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