lewm
Responses from lewm
| Phono Box DS3 B output impedance The jury is still out on whether the "impedance" of the cable, which when we say it is 50 or 75 ohms for a single-ended cable (with RCA terminations) or 110 ohms for a balanced cable terminated in XLRs, should be added in, in calculating the ratio... | |
| Phono Box DS3 B output impedance "How can you not know this and still spout all kinds of technical details here?" Because I only write what I think is correct. However, I am not an engineer, not infallible, and I can make mistakes. When I am in the wrong, I like to be corrected... | |
| Phono Box DS3 B output impedance Where on earth do you get the idea that "an XLR cable" has a 110 ohm impedance? And even if it did, do you count that as part of the output Z or does it add to the input Z? That choice would drastically affect the calculation. Of course, the highe... | |
| Phono Box DS3 B output impedance 1.66K divided by 200 = ~8/1, so not quite 10/1, but the difference is trivial. There is nothing magic about the 10X rule of thumb. The fraction of signal voltage transferred is defined by the fraction Zi/Zo+Zi. When the ratio of output to input Z... | |
| How often to you clean vinyl and the needle? I wonder how many of us who rarely clean their styli ever look at the stylus under high magnification after long term use. If you did you’d be motivated to clean the stylus every few sides. I routinely use Magic Eraser but to be really thorough I ... | |
| Phono Box DS3 B output impedance Lanx, The OP wrote above that he is driving a 1.66K input impedance. And I think that's no problem, even if the output impedance is 200 ohms. | |
| Phono Box DS3 B output impedance If it's 1.66K ohms input Z, then you are probably OK, but I don't blame you for wanting to be sure, because unless the output Z of the DS3B is under 200 ohms, the ratio of output Z to input Z might be a shade lower than 1:10. On the other hand, i... | |
| Phono Box DS3 B output impedance I can’t find it, either, but assuming you own the all solid state DS3B, the output impedance ought to be very low, in the range of 100 ohms give or take, which means it can drive any linestage you’d care to use. Is there some reason you need to kn... | |
| Audio Technica AT 1005 ii or Fidelity Research FR54? If you go with a known 5mm error in pivot to spindle distance, then other compensations in overhang and headshell offset angle would have to be introduced, if you want alignment to conform to any typical algorithm. There are tables on line to hel... | |
| Wow & Flutter measurement I am curious why you ask the question. Every TT has some inherent wow and flutter, and every LP has some wow and flutter of its own, due to warps, off-centeredness, and/or flaws in the mastering process. I am just wondering why you want to measure... | |
| Hana Umami Red review Some great cartridges can pass through a phase where they sound downright mediocre or bad, during break in. Likewise, early ecstasy can turn to long term meh. | |
| Any experience adding a LPS to a stock Sutherland Duo phono stage? I assure you that the power supplies in your Duo are already "linear" type power supplies. The term refers to a conventional method for deriving DC voltages and current to run the audio circuit. AC from the wall goes through a transformer to alte... | |
| Any experience adding a LPS to a stock Sutherland Duo phono stage? And by the way, you would need two separate PSs or you would need to re-wire the unit to run. off a single PS that could supply both audio circuits. That's a complex job. Even to bypass the built in PSs with a pair of external PSs is not trivial... | |
| Any experience adding a LPS to a stock Sutherland Duo phono stage? Requires two power cords because it is dual mono. "Dual mono" means that each channel is completely discrete from the other, including the PSs, all the way back to the wall socket. So, you naturally need two power cords. This is a design feature, ... | |
| Any experience adding a LPS to a stock Sutherland Duo phono stage? You might provide more information for those of us who are not Sutherland aficionados. Is the OEM PS outboard or built into the main chassis? That’s the first question, because if it’s outboard, then it should be a simple matter to replace the PS ... |