Hi Folks,
Can anyone know what the purpose/function of my red circuited wiring for this SE OPT Primary at 1K6 / 30W ?
Which circuit and example used for ? Any benefit to the AMP design ?
Can anyone know what the purpose/function of my red circuited wiring for this SE OPT Primary at 1K6 / 30W ?
Which circuit and example used for ? Any benefit to the AMP design ?
Good thread here: https://www.diyaudio.com/community/threads/cathode-and-other-types-of-feedback.76541/
PS I removed previous schematic because it was not a very good example.
PS I removed previous schematic because it was not a very good example.
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I guess the text is in your own country's language, isn't it? Then you're most probably the one who knows best what it's meant.
Best regards!
Hello Kay, I am not a Japanese but is Hong Kong . I just wanted to seek a SE OPT for the KT 150 then found it , however it showing what different from other general OPT that I know, so I resort from this forum expert😁
Anyway i am happy to have your response, especially Jcalvarez 👍
Anyway i am happy to have your response, especially Jcalvarez 👍
Some mains benefits of CFB (and NFB in general)
1. Allowing the use of pentode/tetrodes with all their pros
a) Low miller capacitance
b) Higher power output (close to 50% theoretical, I've achieved 45% efficiency)
2. Triode like or better linearity.
3. Higher DF vs power output
To get higher benefits vs %CFB, you should be looking for steeper (high gm) tubes.
1. Allowing the use of pentode/tetrodes with all their pros
a) Low miller capacitance
b) Higher power output (close to 50% theoretical, I've achieved 45% efficiency)
2. Triode like or better linearity.
3. Higher DF vs power output
To get higher benefits vs %CFB, you should be looking for steeper (high gm) tubes.
Thx 50AE your explain
So any suitable power tube for this SE design ? 6C33 is best candidate? I find this SE OPT is 600ohm also has this CFB wiring
So any suitable power tube for this SE design ? 6C33 is best candidate? I find this SE OPT is 600ohm also has this CFB wiring
It’s a winding dedicated to negative feedback only with a thin wire not able to be used as secondary connected to a speaker.
You can deduct it by looking at the columns where there are written all impedances (0-6-24 for the ZNF) and from the table below, where its Rdc is declared at 3,8 Ohm.
You can deduct it by looking at the columns where there are written all impedances (0-6-24 for the ZNF) and from the table below, where its Rdc is declared at 3,8 Ohm.