“ measure and listen “ Max Townshend
obviously the OP is in an excellent position to do both and discern …..and learn
obviously the OP is in an excellent position to do both and discern …..and learn
Step by Step How to Use a Digital Multimeter / Oscilloscope for Azimuth Adjustments
So lewm, regarding your response, I have in my hands the Acoustic Sounds test LP already so I can do the stereo, left and right channel 1K hertz test tones. In your post you said, " Also, keep in mind the obvious fact that you would like to insert your meter or scope as close to the cartridge output as possible. If you readout at the phono stage outputs, then you are including any inequalities between the two channels of your phono stage in the data. On the other hand, trying to read the microscopic voltages from an LOMC cartridge directly can be frustrating or impossible if you want repeatable results. It's easy with high output cartridges and good instruments." Based on this, with my Hantek, I'm wanting to use it in the oscilloscope or digital multimeter mode? I dont know if it is sensitive enough to read out the turntable directly or not. My cartridge is the Soundsmith Zephyr II which is a low compliance, high output cartridge. Output on the spec sheet is output voltage of > 2.2 mV @ 5/cm/sec. This is where I'm technically inept as far as knowing if that is enough for this Hantek to read out at the turntable or not. I'm guessing it wont go low enough as it says, " VOLTS/DIV Range: 10mV/div~10V/divat input BNC ". This is 2.2mV output so lets assume I have to measure out of the Sutherland 20/20 outputs instead to get readings. |
newguru, Seems you may be correct that your meter is not sensitive enough, but the spec for output voltage of your cartridge (2.2mV at 5/cm/sec) alone is not the final arbiter of whether or not your meter would work. Because we don't know what is the stylus velocity on the 1kHz test band; it might be 5X or 10X the standard velocity for measuring cartridge output, which would put you at least at the lower end of your meter's sensitivity. On the other hand, since crosstalk is going to be a tiny fraction of the signal voltage, and since that is what you ultimately will want to measure, you're likely to be out of luck for measuring the crosstalk directly. That was to be expected, and it is my fault for suggesting it might be even possible without amplification. So you are going to have to do the measurements at the output of the phono stage or preamplifier. The phono stage provides RIAA correction. The RIAA curve is flat from about 500Hz to about 2kHz, which is good, because it will be flat (zero correction due to the RIAA filter) at 1kHz. The output of the phono stage will be in a very comfortable range for either your scope or the meter function. (I gather your Hantech can function both a scope or as a meter.)I recommend that you read this article. It makes a good argument for the "physical" method of adjusting azimuth.http//korfaudio.com/blog36 With all respect, MC, I have no idea what you are talking about here or how it relates in any way to adjusting azimuth: "The problem with this one, it is like measuring an amp by watts. Do the most watts mean the amp sounds the best? Right. Waste of time." |