KT88 - Single Ended Tube Amplifier Build 2018 - Part 1 

Mark, thank you for putting so much effort into making this video series. I built this amplifier and absolutely love it. The build was a great experience and I learned a ton. And, I have a killer amp to show for it.

I've been looking at this amp for a couple years myself, cant wait to see what you think. I'm finally building a 2A3 stereo. RIP Kegger, learned so much from his posts.

Mark, you have been cranking so much excellent content. Thanks.

Wow, thanks for jumping on this one. I am really looking forward to this build. BTW, I really like the new format with the second picture inset.

Mark, great videos. Looking forward to this build. Keep up the great work.

I built a Kt88 push pull amp back in the year of 1956. I´ve moved on a lot since then.

Thanks so very much for your detailed instructions and time. I'm just getting started on these series of videos, this something I'm going to try and build. I'm 187 n.c. on the 11 meter channel 1 holla back 😁

The show must go on! Keep it coming.

Hi mark keep them coming loved the 807 don’t know which one to build now might just have to be both and can’t wait for the pre-amp it’s going to be a busy year have a good one

Thank you for doing this. Much appreciated.

Excited about the new series. I have a KT88 push-pull amp and am interested in comparing it to the KT88 SET. I have x2 matched sets (4 valves) sitting on the shelf already :)

Mark, I have a long time passion for H-Fi and currently run a high end solid state (Chord SPM 1050 MK 2) and a Linn Streamer (Akurate DSM) but was quite beguiled and bewitched recently when hearing a demo on an Audio Research GSi75 amplifier..... This set me down the road of thinking about a self build of some sort and that is when the wheels basically fell off! I quickly discovered that power transformers of the voltage rating you prescribe in this circuit are as rare and hard to find as hens teeth -not to mention VERY expensive. Edcor wanted (from memory) $225 shipping. Factor in the cost of output transformers and choke and we are suddenly in to seriously large amounts of cash for just these parts alone. I was hoping to find a good sounding build for $300 dollars total but alas...Keep up the good work. I am much enjoying all the stuff on RU-vid on self build but fear I will be putting the money towards a factory built amp from AR. Will follow with bated breath and see if you come up with changes to your initial design. If not you will be the VERY FIRST builder who dos not meet snags and change things along the way. You touched on this in the Part 1 video. Greetings from a 63yr old retired Telecommunications Technician from Scotland by the way. Ah, the power of the internet!

Doing my "Happy Dance" will not put up a video of it, think of a bobber shaped jello item put into a paint mixer -- not pretty :-)

Hi I have built several SE amps and just a tip for your future SE designs. Since there is no Push Pull type noise cancellation, parts and tube, wiring and ground layout is more critically important. I notice that your input (6dj8) tube is close to the output trannys. The high magnetic flux of the OPTs can affect the input signal and so it is best practice if at all possible to have the input tube away from any of the magnetics and with as short an input lead from your input connector to the input tube as possible. Keep up the good work! Cheers.

Awesome! I might just build this one! Thanks Mark!

this guy is a tube amp Jedi. thanks for all this detailed info

Those edcors are reasonable actually!! For what you will have in the end awesome!!

Mine was like number 5 :-) Greets from Aberdeen, Scotland.

Nice!! Very excited!!