Most of those Anti-Riaa circuits are theoretically accurate but to make a practically accurate one with ready to buy parts I think Bonsai's approach is best: http://hifisonix.com/wordpress/wp-content/uploads/2016/12/Accurate-Inverse-RIAA.pdf
1% each but anyway since you found a solution for the caps then find 0.1% resistors too and follow Kevin's mod for 600 Ohm source. But is everybody's gen as flat as the anti-riaa will be? A good sound card may more easier be.
Could you elaborate or give a link to se how to?
I meant a good sound card can be flatter in the audio band than some cheaper generators maybe
What about the Leader Lag-120A?
https://doc.xdevs.com/doc/Leader/Leader%20LAG-120a%20-%20Manual.pdf
Or don't worth to use it to measure the RIAA?
My preamps have an input impedance of 100K.
Itch preamp 3.9uF & 100K Cut-off frequency fc = 0.4Hz
Itch 0.1uF & 820K Cut-off frequency fc = 1.9Hz
Itch 0.47uF & 820K Cut-off frequency fc = 0.4Hz
No good go higher than 01uF, using V-Cap coupling calculator.
Load Input Impedance (Ohms): 820000
Capacitor Value (µF) 0.1
-3db Frequency (Hz): 1.94
Optimal low frequency response (Hz): 19.41
If used 0.47uF
Load Input Impedance (Ohms): 820000
Capacitor Value (µF) 0.47
-3db Frequency (Hz): 0.41
Optimal low frequency response (Hz): 4.13
So no act as subsonic filter for frecuencies lower than 20Hz
Itch preamp 3.9uF & 100K Cut-off frequency fc = 0.4Hz
Itch 0.1uF & 820K Cut-off frequency fc = 1.9Hz
Itch 0.47uF & 820K Cut-off frequency fc = 0.4Hz
No good go higher than 01uF, using V-Cap coupling calculator.
Load Input Impedance (Ohms): 820000
Capacitor Value (µF) 0.1
-3db Frequency (Hz): 1.94
Optimal low frequency response (Hz): 19.41
If used 0.47uF
Load Input Impedance (Ohms): 820000
Capacitor Value (µF) 0.47
-3db Frequency (Hz): 0.41
Optimal low frequency response (Hz): 4.13
So no act as subsonic filter for frecuencies lower than 20Hz
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