lewm

Responses from lewm

Investigating if ultrasound is harming LPs
How bad can the damage be? Good question. But I thought the question was how to detect damage, not whether it’s bad (or noticeable) or not. Whether it's noticeable in your test of course would be a function of the listener’s acuity as well as the ... 
Discuss The Viv Lab Rigid Arm
Raul, I get your position vis a vis tube vs transistor.  You are entitled to it.  But you cannot seriously be thinking that the idea of an underhung tonearm is or ever was foisted upon us by the evil "AHEE", can you?  I hope not.  It's quite the o... 
Investigating if ultrasound is harming LPs
Like I said above, but which gleaned no attention at all, if you want to find out whether US cleaning can damage the encoded music signal on an LP, the way to go is to look directly at the signal on an LP before vs after US cleaning, not the weigh... 
What's A Good Upgrade From A Manley Steelhead?
Tomic, any time you wanna talk Beveridge direct drive amplifiers or spkrs, you can pm me. It’s a labor of love. I’ve probably got a few thousand dollars worth of spare tubes, capacitors, resistors, and even transistors in my basement workspace. F... 
What's A Good Upgrade From A Manley Steelhead?
People used to buy used Techtronix oscilloscopes just in order to harvest the TFK 6922s inside. (Perhaps also Siemens brand.)  
Discuss The Viv Lab Rigid Arm
It’s really impossible to have a calm friendly open minded discussion  of anything remotely controversial on this Forum. Particularly since so few of us have hands on familiarity with the subject device. I vote to quit trying.  
Investigating if ultrasound is harming LPs
effischer. No problems with what you wrote, except this: "Very few consumer devices are capable of tolerances better than 0.1 gram. This presumes the device is tared (validated) using a known standard traceable to an accredited, recognized standar... 
Investigating if ultrasound is harming LPs
You want to hold the vinyl rigidly during the cleaning, to mimic the situation with an actual LP. Otherwise the US energy is dissipated kinetically as the 5g piece of vinyl is tossed about. Some energy is lost that might otherwise hypothetically b... 
Discuss The Viv Lab Rigid Arm
Pindac, Speaking for myself only, and possibly for some others, I do not view this discussion as a debate where there could ever be a true "winner".  I champion the idea of an underhung tonearm as a novel idea that deserves some thought and attent... 
What's A Good Upgrade From A Manley Steelhead?
While someone else mentioned that the Steelhead uses a transistor per channel as a constant current source (CCS), it is my belief that the amplification stage is actually a hybrid cascode, with a transistor serving as one half of the cascode circu... 
What's A Good Upgrade From A Manley Steelhead?
In describing the H-6500 as a "preamp", I presume you mean either that it is a full function preamplifier with a built in phono section or that it is a linestage, with no phono section. (You must be young; in the good old days there were very few ... 
What's A Good Upgrade From A Manley Steelhead?
I am totally with Raul on this; spending more money, even 2X more money, is in no way a guarantee of a performance upgrade.  A difference, yes, but an improvement?  Not at all necessarily.  Since we are all fallible and human, once we've paid a lo... 
Stylus gauge recommendations ?
That "Neoteck" is sold under many brand names at many different prices.  Some versions have metal cases and cost more.  I have one and used it for years, but I eventually detected that the weigh pan on mine was ever so slightly magnetic.  This is ... 
Stepping Up From A Graham 2.2 On A Basis Audio Debut Deck
What about Graham Phantom or any of its later versions? They’re thought to be much better than the 2.2.  
What's A Good Upgrade From A Manley Steelhead?
Keep in mind that a current driven phono stage works best only with very low internal resistance LOMC cartridges. Rule of thumb is 10 ohms or less. Certain Benz LOMCs need not apply, for one example. The idea that you never have to think about loa...