lewm

Responses from lewm

The "Very Best Record Cleaning Formulation"
Cleeds, the point is that unadulterated water is not wet enough to get into the grooves. The surface tension of water by itself is too high. So some sort of wetting agent is useful to reduce the surface tension of the washing solution, so that it ... 
A Few Turntable Measurements using the RPM Android App
This is one of the eternal arguments among vinylphiles. In belt drive world, we have the light platter/high torque motor crowd vs the heavy platter/low torque motor acolytes. Then we have the idler/DD aficionados who jeer (privately) at both. Mode... 
A Few Turntable Measurements using the RPM Android App
There is a common rationale associated with the combination of a high mass platter with a low torque belt drive. The idea is that speed stability comes from rotational inertia, not motor torque. The Walker Proscenium, all Nottingham tables, and ma... 
A Few Turntable Measurements using the RPM Android App
Good.  
A Few Turntable Measurements using the RPM Android App
Duckman, I am talking about the weight of the phone being unevenly distributed on the platter. That’s not the same as a record weight that fits over the spindle, or as a peripheral ring. In a high quality TT the platter has been dynamically balanc... 
A Few Turntable Measurements using the RPM Android App
My concern is that the weight of a cell phone placed eccentrically on the platter will per se skew the reading, especially for wow and flutter. Furthermore, is there independent evidence that the rpm readout is accurate? I thought there was some d... 
Step Up Transformer
Two different things. I think you’re referring to current driven phono stages that supply all the gain needed plus RIAA correction. There is a plethora of those. I’m talking about a current driven external gain-only device that does not supply RIA... 
Step Up Transformer
Another new option to consider is to use an outboard current driven gain stage to feed a very good MM stage. Sutherland make one, and I’m using one from another source that was custom built for me. Results are excellent if you’re limiting your cho... 
The "Very Best Record Cleaning Formulation"
In Europe, the PhD is generally regarded as superior in academic achievement to the training required of clinical physicians. In the UK and maybe in Germany and elsewhere on the continent, clinicians are addressed as “mister”, and only PhD recipie... 
You've run some pretty fancy MC's, but the _______ MM cartridge really impressed me
gakerty, I love the 980LZS, too.  In my case, I have the 981LZS, one NOS and one used.  It is said that the 981 is a selected 980, but i doubt that makes any difference.  
The "Very Best Record Cleaning Formulation"
Dear Wizzzard, of course osmolality does not describe the level of “particles”, and I never said it did. I did say that osmolality is used as a measure of the degree of deionization of water. Then Mijostyn conflated ions with particles, and I corr... 
The "Very Best Record Cleaning Formulation"
Wizzzard, sorry to say you did misunderstand me, not that it’s any obligation of yours to deal with every idea here. What I am trying to ask is whether there’s any problem with deionized water, if and only if it’s also distilled. I get that you’re... 
The "Very Best Record Cleaning Formulation"
Mijo, I wrote that deionized water is commonly evaluated for the degree of deionization by measuring its osmalility. Note the root word, “ion”. Ions are in solution by definition. So what has this got to do with particles, which are not in solutio... 
Turntable is the most expensive in the chain, do it make sense
Interesting sentences from the CS Port website: "Servo noise is eliminated by open control that does not apply a servo. In addition, a highly accurate voltage is supplied to the motor without fluctuation based on a crystal oscillator with high fre... 
Step Up Transformer
Not sure what you're after. Bobs Devices SUTs are certainly "off the shelf", and if you purchase one of their best SUTs, and one that is suitable to both your cartridge and your phono stage, you will probably have wide bandwidth and low distortion...