I started a thread about a month ago when I recapped and tweaked my 5f11. I thought I'd start a new thread in case some interesting info came of it. I found my original build thread from it - lucky for TDPRI because I'd never keep up with notes this long - and compared the original Mojo 3x16uf filter caps to the measurements with the current 3x22uf F&T caps. Wall voltage tonight was 121v which is approx. what I usually measured at my old house when I built it, but I don't know what it was when I measured it then. I adjusted the bias to get to the same plate to cathode voltage and measured everything else from there. From my old thread: https://www.tdpri.com/threads/starting-a-5f11-vibrolux-build-bias-question.691516/page-4 -32.94v bias 373v plate to cathode 24.7mA at 1-ohm resistor. Voltage on the 5Y3 side of the 100K resistor is 338v. Diode side of the 100K is 193v B+ is 377v 374v 289v Rob's Bias Calculator says I'm at 65.8% dissipation Same tubes and tonight's measurements: -32.99v bias 373v plate to cathode 21.8mA at 1-ohm resistor Voltage on the 5Y3 side of the 100K resistor is 311v. Diode side of the 100K is 129v B+ is 378v 375v 290v Rob's Bias Calculator says I'm at 58.1% dissipation So, the only real differences are voltage from the rectifier to the bias circuit (-8% before the diode and -33% after the diode), and the bias dropped nearly 8% cooler. I just finished up the new cabinet, and it's been a long time since I've played it, but I felt like it was cleaner & punchier than it was before. I had it set around 55% and it stayed clean with a Tele all the way up the dial. I guess my question for discussion is "Can heavier filtering affect tube bias?" We see posts all the time about upgrading filter caps and getting better bass, output, clarity, etc. But, is the bias related, and if so, is a cooler bias at the same voltage level the reason for the other better known attributes?