On Tuesday, April 17, 2018 at 2:59:53 PM UTC-4, John Williamson wrote:
On 17/04/2018 18:15, wrote:
And to make
things more difficult, there's the RIAA equalization curve that boosts
the highs and cuts the lows when cutting, and does the opposite on
playback.
and that has the effect of making the system approximately displacement based rather than velocity based.
mark
That was also what happened in the days of ceramic Measurement
(dB)
Vin = 28 Volts
The way
they worked made the output almost independent of the frequency for a
given displacement of the stylus, assuming the input impedance of the
amplifier was high enough.
For most of them, loading the cartridge with a 47 kilohm resistor almost
made the output curve match the RIAA curve with a properly loaded
magnetic cartridge.
--
Tciao for Now!
John.
wow you are bringing back memories..
I remember as a kid first reading about RIAA EQ and trying to figure out why my record player seemed to work OK without any RIAA EQ in the electronics.
It had a ceramic cartridge.
Then when I got a real turntable with a magnetic cartridge, it all started to make sense.
mark