lewm
Responses from lewm
| Options for ridding records of static electricity I agree that felt platter mats have not been good in my experience, but I never owned an LP12, and it's just possible that felt may sound good on an LP12 platter. Dust covers suck, too. Just couldn't resist contradicting Mijostyn. He knows how I... | |
| 'Life Above 20kh' Research Paper, Harmonics (Overtones) The late Allen Wright, who was a well known designer of superb preamplifiers and phono stages, wrote in his "Tube Preamp Cookbook" that he or a panel of listeners could hear changes he made to a circuit that affected response at 750kHz! He also s... | |
| Running Two TT into one phono input, best options? Uber, If you are hoping for someone to tell you there is a perfectly transparent switch to solve your problem, you are hoping in vain. I do know that Dave Slagle of EMIA can make you a fantastically good switch to solve your problem, but even he ... | |
| Tone arm resonance and cartridge compliance: How do they interact?? It's essentially a problem in integral calculus.I have and will continue to align myself with what Raul and cleeds have said, which is what I also have written, in response to BR3098. Adding mass at the headshell has the largest possible relative... | |
| Tone arm resonance and cartridge compliance: How do they interact?? Raul, I guess we are all guilty of what we call in English "talking past each other", which means not paying attention to what the other guy said. I fully agree that no calculation based on pure physics will really predict how a given combo of to... | |
| Looking for ideas on Lyra Delos - muddy middle If you check his posts, I think you might find that JCarr himself has advocated running LOMC cartridges "wide open", at 47K ohms load. (Even though, I know, his poop sheets recommend ">100 ohms", or something vague like that.) You might try 47... | |
| Tone arm resonance and cartridge compliance: How do they interact?? br3098, If you wanted to insult me, you could not have done a better job than to accuse me of cutting and pasting from a text. ( You wrote, "I agree and disagree with different parts of your statement. Rather than cut and paste a text on mechanic... | |
| Sub Sonics and woofer pumping Not that I think it’s relevant to your immediate problem, but increasing the weight of your counterweight actually has the paradoxical effect of reducing the effective mass of your tone arm, because effective mass is affected by the square of the ... | |
| Tone arm resonance and cartridge compliance: How do they interact?? Dear Raul, I have to differ with you only on what you wrote in your first paragraph. The effective mass of the tonearm and the compliance of the cartridge determine the resonant frequency according to the formula that you know and I know too. You ... | |
| LCR phono stages we know about I have to apologize. The two phono stagas I mentioned, the BMC MCCI, and the 47 labs, are both current driven phono stages, which is an entirely different subject, but I do have interest in that mode of operation for low output moving coil cartrid... | |
| Tone arm resonance and cartridge compliance: How do they interact?? My Triplanar and I suppose several other tonearms achieve the same end by supplying a set of CWs that vary in mass. You can slide them on or off the rear end of the arm. Further the Triplanar CW is physically decoupled from the pivot by a nonrigid... | |
| LCR phono stages we know about Thanks for your inputs, Jarrett, engine, and Indie. Sometime after my last post in 2016, I bought a Manley Steelhead. It suits my particular needs for (1) multiple phono inputs, (2) MM and MC gain capability, and (3) LCR. It's LCR through the M... | |
| Tone arm resonance and cartridge compliance: How do they interact?? br3098, You are confusing two different things. roberjermain is correct, and I wrote the same thing, a few posts above yours. BOTH increasing tonearm effective mass and increasing cartridge compliance will decrease the resonant frequency of the ... | |
| Tone arm resonance and cartridge compliance: How do they interact?? I am surprised no one has mentioned yet that the tonearm has no intrinsic resonance, because the only resonance it has that you care about is the resonance with the cartridge bolted onto it. The effective mass of the tonearm is equal to the basic... | |
| TT Hum Almost any cartridge will produce a faint noise if it is in space, not touching the LP surface, and if you then turn up the gain high enough. That is more a function of the phono stage signal to noise ratio and/or ambient electrical noise, than it... |