Dec 28, 2018 · Therefore, if in a UL 6L6 design -- operating with fixed bias and 500 volts B+ -- the plate voltage swings from (about) 500 vdc down to 80 vdc under full power conditions, then the screen grid voltage is also dropping from (about) 500 vdc, down to 319 vdc.

Oct 27, 2024 · First, I learned that the 6L6 can be very low distortion in the SE-UL configuration, which was a pleasant surprise. Secondly, I realized that it can produce some reasonable power levels to satisfy those with a desire for such.

Sep 4, 2019 · I'm thinking something with a minimum power rating of 20 watts so something in the push-pull camp using 6SN7s and 6L6/5881 only because I have a good inventory of each. I also have many of the 9 pin 12 family but I prefer to use the 6SN7 on the front end.

Mar 11, 2013 · The 6L6 (or any other tube) does know what amplifier it's in, only "sees" the instantaneous voltage applied to its electrodes (hint hint) so if you calculate what voltages it gets at any plate/screen/grid combination, you'll know what current goes through it at any moment.

Oct 8, 2024 · Having performed the study of the 6L6 tubes in an SE-UL configuration, and seeing the excellent performance which could be achieved, I decided to put the data into a practical application. This amplifier is the result.

Jun 25, 2010 · Hey guys, as my first majorish valve project, I'm planning an stereo class AB2 amp using 6P3S's in the output stage. Most of you guys probably know this but they're pretty much the same as the 6L6GB; a lower rated 6L6GC.

Dec 10, 2006 · Here's a picture of the UL curves for the 6L6. If you're not happy with the bias balance pot in the schematic, there are other ways to do it. It is my opinion that balance pots are good for a mass manufacturer but for one off's, I like to solder a …

Jun 22, 2017 · Here are the schematics for my 6L6 ultra linear amplifier that is the power amp in my main system. It's a fantastic sounding amp, and can do 28.5W/ch before clipping sets in.

May 24, 2017 · After nearly 10 months of use, here's my review of my 6L6 custom amp from Eric McChanson. Let's set some context. I've been into DIY hifi for about 25 years, I love SET valves, especially 300B amps.

Feb 9, 2025 · Optimized SE-UL 6L6 output. The first requirement, "Multiple selectable inputs", is self explanatory and supports my desire to have multiple input sources for my office system without jockeying equipment or cables.