I guess you know, I'm using AVC and don't like high output impedance from source.
Felipe
OK, fair enough. You replace the capacitor with another capacitor, but it is a nice trick to get away with a much lower capacitance.
It's a creative way to make a high-pass filter, but I don't see why it would be a servo. I may be wrong, though.
What's in a name, it's a bit of a philosophical issue.
According to Wikipedia it is:
Servo is an automatic device that uses error-sensing negative feedback to correct the action of a mechanism.
In that way it fulfils IMO the definition by automatically doing error sensing of DC output voltage caused by offset and correcting the unwanted DC current through the Cart by negative feedback.
But in Audio a servo is usually referred to as a way to reduce the DC output voltage of a amplifying stage, which is definitely not the case here, so I agree with MvdG.
Hans
Interesting, the way I looked at it you were eliminating a loop for DC rather than adding a loop, but in the way you describe it, you can also see it as adding a loop.
With the right test equipment and an accurate test record, you could measure the impedance and the frequency response, and then a model could be fit to the results of the measurements.
The alternative is to make some pictures of the Cart and ask Billshurv.
He is the Wiki for Carts, but MvdG's proposal to measure is the better one.
Hans
Could you point us to a detailed explanation how to measure our carts ?
Tia,
Dennis h
The simplest way is with an Ohm and an induction measurement if available on your multimeter.
Hans
Hans
Besides, you will need an accurate test record and something to measure the cartridge's output level.
