May 27, 2014 · Recently added speaker/headphone switch and headphone jack. Now it’s personal! How it was done: Single-ended pentode mode, with primary-side feedback, and fixed bias operation. A look at the construction: Loading... This amplifier was built on-the-cheap.

May 11, 2013 · I finally came back to SE with a PSE amp. I hadn't tried that before and it really worked with PSE 4P1Ls in the output. Crucially, I was able to run all the tubes in filament bias so no cathode bypasses, and all transformer coupled.

May 24, 2021 · You will be surprised how well good 807 tubes match their self bias voltages (and therefore how well they match their cathode currents). They will match well enough for parallel single ended. Be sure to use individual grid stopper resistors for the control grids.

Sep 4, 2013 · The 807 is a higher voltage version of the 6L6G. I believe it was first manufactured around 1937-38. The 807 was used in radio frequency transmitters and at times audio modulators for AM transmission. Both ham radio and WWII equipment made …

Feb 6, 2019 · Evening folks, I have recently finished up a SE 807 stereo amp and I am really enjoying it. It was designed by TriodeDick and Tweaked by Mark @ Blueglow for American power and part availability. I am looking for a Push Pull 807 design that I can build now.

Apr 9, 2017 · I have some questions about the Triode Dick Single Ended 807 Amplifier design. It would be helpful if someone could help answer my questions and if they have the time, describe how they derived the answers.

Jan 2, 2021 · It's a SE 807 amp based on the Blue Glow/Triode Dick design. All the iron is Transendar, mostly Kiwame resistors, IC coupling caps, and Nichicon electrolytics. The large 30uf cap between the chokes is temporary as a Solen film cap will take it's place once it arrives.

100% Hand built stereo, singled-ended class A Pentode/Ultra-Linear, all tube power amplifier using 807, 6N1P and 5U4 tubes. This amplifier layout has been carefully designed using a combination of Vintage, and high quality components.

The 150 / 75 SE/PP 807 MONOBLOCKS can switch from either 75 watts in single-ended to 150 watts in push-pull. The 807 tube was chosen for good reasons: easy availability and high reliability, but mainly for its glorious sound in its (intended …

Dec 12, 2011 · I'm about to start my second amp project, and this time my goal is to use up some tubes I have in my parts bin. The tubes I'm going with are a 6F5 and two 807's. My main idea here was to modify the RH 807 SE schematic to use two 807 tubes in parallel for the output stage.