Please read the description/textbox first. The only aim of this video is to show how you can cure the problem of the (very) “faint hum” (50 Hz or 60 Hz) on the background that happened with the earlier published tube amplifier, made with 2 x the ECL 80. That was the only problem that had to be adressed/cured. It was cured with one extra resistor of 220 Ohm (0.5 Watt) and one extra electrolytic capacitor (22 uF-400 Volt) in the filter unit of the plate voltage. More info in this video.
Please go to the earlier 4 video’s in this series about how to construct such a simple stereo tube amplifier with a triode-pentode tube, like the ECL 80 or (even) the ECL 82. Detailed instructions and schematics are there, with comments.
The final video (where all the schematics are showed, and relevant links) and to which I refer is here:
https://youtu.be/vhrA7O77Hn8
In that video you also find the links to other video’s about this project: making an audio tube amplifier, that started approximately 1 month ago.
Now all problems are cured and I can make a good looking enclosure for this tube amp.
My You Tube channel trailer is here: https://youtu.be/xbgQ8T3oqh4 When you search, search always “NEWEST FIRST” to get the right overview. You can also search via the “looking glass” on my Channel trailer via keywords like ”audio”, “radio”, “amplifier”, “filter”, “Shortwave”, “transistor”, “FET”, “oscillator”, “generator”, “switch”, “schmitt trigger” etc; so the electronic subject you are interested in. My books about electronics & analog radio technology are available via the website of "LULU”, search for author “Ko Tilman” there.
https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=Ko+Tilman
I keep all my YT videos constant actual, so the original video’s with the most recent information are always on YouTube. Search there, and avoid my circuits that are republished, re-arranged, re-edited on other websites, giving not probable re-wiring, etc. Some persons try to find gold via my circuits. I take distance from all these fake claims. I cannot help that these things happen. Upload 8 July 2022.