K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ K&K Audio / Lundahl Transformers ]

---

[ Alert Moderator ]

---

RE: CCS with Cathode Resistor in a long tail ?

Posted by KevinC (M) on September 19, 2016 at 09:40:01

In Reply to: RE: CCS with Cathode Resistor in a long tail ? posted by multiblitz on September 19, 2016 at 06:51:15:

I'm sorry, but I should have caught the sign. It does need to be a negative voltage, and the greater the better, to a point. I don't hear any discernible improvement with more negative than -25V in my circuits.

In my 6N6P listening days I found that the tube sounded very much better at 20-25mA with about 150 volts cathode to plate. I can imagine it wouldn't be very exciting at 8mA, whereas the 6922 would shine at 7mA and 150V!

Just to confound you a bit more, I prefer the sound of balanced driver stages with current source plate loads and a simple unbypassed common cathode resistor. Of course, you can use a common cathode CCS connected to a negative supply, but then you need to add a load resistor to ground for each input tubs so you can set the plate voltage.

Kevin Carter
K&K Audio
www.kandkaudio.com

This post is made possible by the generous support of people like you and our sponsors:

Amplified Parts

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---