Mar 26, 2012 · I decided to build an amp using Kegger's circuit for a single ended ul kt88 amp. I have received most of the parts needed, and should be getting the power transformer from Edcor today. I had a question for the power supply with wiring the dual 5v4g's. Does it matter which plate the red wires go to?

Feb 15, 2022 · However, looking at the KT88 datasheet it seems this tube might be most comfortable with 2.5 to 3k and 250V-300V across the tube. I'm intending to run local cathode feedback on the output stage. Interested to hear what you're all running.

Jan 11, 2014 · The KT88s are in parallel SE but fed from a large PP OT, in UL mode. Note the KT88 screens are fed from the OT primary center tap. B+ in one side, plate feed out the other side of the primary. This is known as Ghetto UL. There is no global NFB as the UL internal NFB in the KT88s is enough to prevent the output from going nuts when cranked.

After extensive research and engineering, New Sensor Corp. has reissued the famed Genalex Gold Lion KT88. This tube has been recreated down to the finest detail with gold plated grid wire, carbonized screen grids, and a tri-alloy clad plate structure for …

Jun 28, 2024 · If IIRC Dynaco’s celebrated MkIII output transformers (A-431) for KT88/6550 PP had a UL ratio of 33%. I have used Lundahl and Toroidy transformers. Lundahl is excellent if used correctly, but Toroidy comes close in performance to my ears and does so at a lower price.

Nov 9, 2009 · I am going to build the Abdellah SE KT88 as modified by Alex Gendrano. I have searched the forums and have not been able to find a specific reference to the purpose of the 5H 250R choke and 10uF cap for the 6N1P plate as shown on the schematic: http://diyaudioprojects.com/Tubes/KT88/

Jan 10, 2017 · Using a KT88 in Ultra Linear mode has a plate resistance of perhaps 1600 to 2400 Ohms, or about 2 times that of Triode mode. The g-p gain is perhaps 10 or 12, 2 times that of Triode Mode. The damping factor is about 1/2 of that of triode mode.

Sep 10, 2014 · A DIY Single-Ended (SE) Tube Amplifier Project that is compatible with KT88 / 6L6 / EL34 / 6CA7 tubes. A 6N1P dual triode is used to drive the output stage. DIY Audio Projects

Jun 22, 2007 · Choose a good quality audio output transformer with a 5k primary and rated for at least 10W. With various KT88 amplifiers we have had good results using the new production JJ KT88 Blue Glass and Genalex - Gold Lion KT88 tubes.

kt88 el34 6ca7 6550 6l6gc. The mode of operation is switchable between triode and UL (ultralinear) by way of a rocker switch on the top panel. "If you are considering an SET amplifier, I would highly encourage you to give this amplifier a try, it is very well constructed, competitively priced, and simply sounds terrific!