tonywinsc
Responses from tonywinsc
| variance of +/- 10 Hz with 1 kHz test tone What is puzzling is such one sided numbers. Are you holding your iPhone in your hand when recording maybe? Place your iPhone on a table while recording. The raw is the actual frequency swing as the record rotates which includes eccentricity of the... | |
| Audio Research REF2 MK 1 Vs. MK 2 Try www.arcdb.ws. It has a wealth of information including pictures and schematics. The MKI has 11 tubes, for example, vs. 8 in the MKII | |
| variance of +/- 10 Hz with 1 kHz test tone My phone locks onto a 1kHz tone with the app. I have the latest IOS, unfortunately. Go to info and see if you have the latest version of the app. Under "Prerequisites" It should say that it now works with a 1000Hz tone. It is not as accurate vs. u... | |
| To adjust ride level of springs on SOTA turntable The Cosmos is nice. The motor is fixed on the sub-chassis. I'd love to get one; but with one son in med school and one a freshman in college, it is going to be a while. And part of the fun of this hobby is making your own mods and tweaks. | |
| To adjust ride level of springs on SOTA turntable You can adjust the height of the sub-chassis by turning those screws at the four corners. Don't try it if you do not feel comfortable trying it. I just did a mod to my Sota that I wrote up on my system page and I talk about the springs there. | |
| Turnable database with TimeLine Rather than hijack this thread some more (sorry Peter:-) I have done a write up on my turntable mod at my system page. | |
| Turnable database with TimeLine I overreacted. The last record that I played the other night must have had noisy vinyl. I listened last night and heard no rumble. I cranked up "For Duke" again. This record has dead quiet vinyl. Sounded great- saxophones and trumpets all over the... | |
| Turnable database with TimeLine I did lose something it turns out. After dark when the ambient noise level was at its lowest, I could hear some rumble. It is faint; but there. So the bushings are transmitting some mechanical vibration from the chasis to the sub chassis. I have s... | |
| Turnable database with TimeLine Just for the sake of argument about calibration of the iPhone's microphone. I downloaded an FFT app a few years ago. FFT is a method of analyzing a noise spectrum. It plots frequency vs. amplitude. I was at an automaker's NVH lab one day a few yea... | |
| Turnable database with TimeLine It is the Dr. Feickert iPhone app. It requires a test record with a 3150Hz test tone, or now the app will also recognize a 1000Hz test tone. I happened to have a test record with the 3150Hz test tone; but Dr. Feickert's test record can be purchase... | |
| Turnable database with TimeLine I forgot to mention that nearly all play in the horizontal plane has been eliminated. The added bushings took up that horizontal play. Corresponding to this is increased damping of motion in the vertical direction. Like I was saying- before if I p... | |
| Turnable database with TimeLine I had my turntable dismantled the last couple of days. I found some bushings at the hardware store that slip over the threaded studs supporting the main chassis. The sub chassis has holes for the studs to go through. These bushings that I found we... | |
| Turnable database with TimeLine It is a Series III from the 90s. I think that is good advice. I will check with Sota. I had the impression that only the Cosmos features a sub-chassis mounted motor with the platter and tone arm. I also have some ideas that would be reversible, to... | |
| Turnable database with TimeLine Yes, my speed was within 1.5Hz of 3150Hz before. One thing I can do is recheck speed after I remove the shims and see if it shifts down. The other thing that I found last year with the iPhone app was that the tt must run for a couple of minutes fo... | |
| Turnable database with TimeLine I just played "Muddy Waters" Original Master Recording. He convinced me. The rhythm and pace was obviously better to me playing this record with the horizontal axis constrained on my turntable. Plus, his voice on the peaks did not break up. I woul... |