|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
In Reply to: RE: LCR RIAA posted by xaudiomanx on January 3, 2015 at 12:20:20:
The circuit describes a K&K Audio product. I would not feel comfortable posting the schematic online without permission. However here is a description of the circuit in Kevin's own words:
"The first stage is a hybrid cascode stage (MOSFET on bottom and 6922 triode on top), but instead of using a resistor plate load, which then requires that series resistor for the EQ, I use a current source. Since the output impedance of a cascade stage is essentially the impedance value of the plate load, the output impedance is then very, very high making the stage a current amplifier. To convert the current output into a voltage for the next stage I use a resistor from the plate to ground (91Kohms). This resistor is also regarded as the source impedance for the following RIAA components, thus obviating the series resistor."
"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: LCR RIAA - JKT 01/3/1516:14:00 01/3/15 (3)
- cascode, not cascade - Lew 17:00:55 01/3/15 (2)
- RE: cascode, not cascade - JKT 21:36:10 01/3/15 (1)
- Ha, ha. My bad. Sorry. - Lew 13:16:24 01/4/15 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
