lewm

Responses from lewm

SUT help
Elliot, The phono stages in both of my phonolinepreamps have sufficient gain to handle any LOMC cartridge. I am going to generalize and say they both produce a total gain (including linestage gain) of more than 75db, probably more like 80db. They ... 
SUT help
Ralph, You should know by now that in my case you are preaching to the converted. I do not now own a SUT. Nor have I ever owned one. Furthermore, except for one amplifier I built myself from scratch for the fun of it and because I came into a pair... 
New Dedicated 20A Circuit Wiring Questions
An isolated ground may be beneficial from a noise point of view. I am not really sure about that, but I do it too. However, I recently learned that it also can pose a danger, because if there is a fault in the Audio system, the circuit does not ru... 
New Dedicated 20A Circuit Wiring Questions
It is said to be a good idea to isolate digital components from the rest of the system, but this can be accomplished via your existing ZeroSurg thing, whatever that is. It is also a good idea to isolate the turntable from other components, because... 
MC-MM-MI CARTRIDGES . DO YOU KNOW WHICH HAS BETTER QUALITY PERFORMANCE? REALLY?
Somehow, two different discussions got twisted together, the questions of whether reproduced frequencies above the range of your or my hearing acuity have any effect on your or my perception of music vs whether one should listen with eyes open or ... 
Tonearm resonance
I'm sorry, but I still don't know what you mean by tonearm noise.  Tonearm bearings can be noisy, but I would think only on a very cheap tonearm.  Anti-skate devices can introduce a source of vibration by several different mechanisms.  But otherwi... 
SUT help
Elliot, So, to boil down what you wrote, your FR SUT used with an LOMC cartridge, has no effect on the overall SQ of your MX110 used straight in with an MM cartridge, even taking into account that the two cartridges themselves are different from o... 
SUT help
In my opinion, if you are dissatisfied with the SUTs that are built into the Modwright, you ought to talk to Modwright about having them install a better pair of SUTs. You would have pretty much the same array of choices, you probably will save mo... 
SUT help
Either “handy” or superfluous.  
Higher Impedance MC Carts on Transimpedance Stages?
Hagtech, You wrote, "There is no real contribution from phonostage, since it appears as a dead short, we are talking transimpedance, right?" I learned my audio electronics from a few good books and from reading what others say on the internet, al... 
Same Dance but New Step
Sounds like the grinding sound had nothing to do with alignment.  What was the problem as identified by SS?  
SUT help
This is very simple, besides the fact that you don't need a SUT.  You can use any SUT with a 1:10 step up ratio.  That means the signal voltage will be increased 10-fold, to 4mV with either of the two cartridges in question. That is easily enough ... 
Hagerman Piccolo Zero: New transimpedance head amp
"Head amp" usually refers to any outboard device that adds gain but not RIAA correction to the phono signal, ahead of the phono stage.  These days, a head amp can be current driven or voltage driven.   The Piccolo comes either way, I think.  
MC-MM-MI CARTRIDGES . DO YOU KNOW WHICH HAS BETTER QUALITY PERFORMANCE? REALLY?
Bipolar transistor for balanced circuit; FET for single-ended circuit.  Either used in a cascode topology with a tube "on top", gives very high gain with very low noise.  
Higher Impedance MC Carts on Transimpedance Stages?
The inductance of an LOMC is trivial, in the sense that it’s very low, on the order of 1000 times lower than MI which is already much lower than MM. Your acquaintance is probably happy because it works and he has yet to try an LOMC with truly low ...