- Apr 7, 2021
- Cluj-Napoca, Romania
One of my next projects is a valve amplifier. I built many solid state amplifiers and I'm very happy with these. I always considered valve amplifiers as being vastly inferior to solid state one but nevertheless I would like to build one to measure it and to listen to it. From all the available schematics and projects I saw, the one made by Bob Cordell (C7 KT88) stuck with me and I'm planning to build it. The only notable difference from the schematic published by BC is that I plan to use an ultra linear output transformer. I have a question regarding output transformers in general. Is there a reason to avoid using troridal ones? There is a company (Toroidy) that builds very good transformers in general. I bought several custom transformers from them for the power supply of solid state amplifiers and I can say these are high quality products. As I do not have that much experience with tube amplifiers (I'm still in the process of reading Morgan Jones's book) I do not know if toroidal transformers have any downsides when used as output transformers in tube amplifiers. I can still buy the "classical" Hammond transformers as these have very good reviews allover the internet. Any help is highly appreciated.