lewm
Responses from lewm
| What should I expect moving from MM to MC? Zarzu, you say MC cartridges are”faster” because they have lower moving mass with the “same suspension “. Yes, MC cartridges tend to have less moving mass compared to MM cartridges, but no, the suspensions are not the same. MM cartridges tend to ... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? Ok. My idea that floating the ground lug above ground along with the audio circuit is unconventional at best, based on what Atma wrote and my own measurements of two phono stages at my house. So I expect the ground lug on the EAR is in contact wit... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? So that 33 ohm resistor we see in the photo, which is in series between the threaded screw and the 3rd pin of the IEC, according to the OP, is either doing nothing or the chassis is floated by the 33 ohm resistor which I certainly agree is not the... | |
| What should I expect moving from MM to MC? “Dangerous, misleading, and wrong-headed” You got that right. | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? It’s possible that we are arguing because our two countries have different codes re grounding. Everything I have written is based on how things are done here in the US. The 3rd prong of the IEC is earth or AC ground. Correct? We see here that ther... | |
| What should I expect moving from MM to MC? Many manufacturers publish frequency response data limited to the "audio bandwidth", which is generally taken to be 20 Hz to 20kHz. However, nearly any good cartridge has an upper end response extending well past 20kHz. The fact that one manufac... | |
| SME 3009 S2 Improved Tonearm problem...possibly Nearly any pivoted tonearm can be made to fit your turntable, if you are willing to source a new arm board OR if you are lucky and the replacement for the 3009 has the same or very nearly the same pivot to spindle distance as the 3009. Yes, the SM... | |
| SME 3009 S2 Improved Tonearm problem...possibly Whether or not an un-specified "Fidelity Research" tonearm would solve your problems is problematic. While I do like my FR64S, its "technology" is about as old as that of the SME 3009, give or take. And specifically the FR64S, FR's best along wi... | |
| One turntable with two arms, or two turntables with one each - which would you prefer? I have 5 turntables with 5 tonearms up and running into two systems. I think that makes me a bit crazy, but I viewed it as a project that required the equipment so I could make judgments for myself. Also, I hate selling anything. | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? I see now that there is a difference between your thinking and mine. I perceive the ground lug, which is meant to be used to ground the turntable or tonearm or both to the phono stage, ought to be or can be floated along with the audio circuit wit... | |
| Linear Power Supply? I don't think the NASA story or the friend story are very relevant to either the question of why some llisteners claim to prefer the tube power supply for a Bergmann turntable over the SS alternative or to the question of using an SMPS vs an LPS t... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? Believe me, I got it. I have a lot of DIY experience, as Atma-sphere will attest. I just am not sure that all the reported information, by verbal communication and by photo, is internally consistent. That’s what I wrote. I was not contradicting y... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? I think I am losing my mind here. The photo showing the two green/yellow wires both soldered to what is said to be a ground lug may not be consistent with your earlier verbal description of what you measured, namely a 33 ohm resistance between "gr... | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? No, the 33 ohm resistor in the filament supply filter should not be causing your problem. I was just wondering whether you had inadvertently measured resistance across it in your earlier report. | |
| Tube PHONO preamp interference - RFI, EMI, bad grounding? If you examine the schematic that someone else posted above, you can see there is a 33 ohm resistor shown in the schematic as a series element in a CRC filter for the filament supplies. I don’t know how you could have been measuring the resistance... |