lewm
Responses from lewm
| Ikeda 9tt retipping DHL. | |
| Phono Box DS3 B output impedance Found this quote from the late Al Margolis, who was either an EE or a physicist and who was in any case brilliant, on the "cables" forum in 2009: "Characteristic impedance, being part of what are called "transmission line effects," is (at least f... | |
| Ikeda 9tt retipping In any event, I agree with you that Boron is probably superior. I think my Ortofon MC2000 cartridge, which is admittedly early 1990s state of the art, also has a duralumin(um?) cantilever, yet it sounds pretty great if you have enough gain. | |
| Phono Box DS3 B output impedance They are talking about "characteristic impedance". Whether that matters at audio frequencies and with typical 3 to 6 foot long ICs is the question. The more I read about it, the more I am convinced it does not matter. Here is a practical rationale... | |
| How often to you clean vinyl and the needle? Those vibration based cleaners do work nicely, but they are not "ultrasonic". The ones I know about, sold under the Audioquest brand and maybe some others, vibrate at around 500Hz. That's why you can hear it. I have the Audioquest version but u... | |
| Ikeda 9tt retipping "Duralumin" is an aluminum/copper alloy. Not pure aluminum. Probably a step or two up from pure aluminum in cantilevers. | |
| 12" Schick Armboard Specifications For me, the failsafe method is to have the blank board made and fitted to the TT. Then using a gauge of whatever kind that fits over the spindle, measure the distance from the centerline of the spindle to the centerline of where you want a hole d... | |
| 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... |