Is SEx the best kit of all?

[Natural Sound]

There is something alluring about dissimilar triodes. My first experience with dissimilar tubes was a 6T9 compactron tube and a circuit in Nuts and Volts magazine. That amp resides in a friends wood shop with a nice set of homemade speakers. It still sounds great but the S.E.X. amp is better in every way.

It should be noted that the 6T9 is a triode-pentode and the 6DN7 is a dual triode so it isn't an apples to apples comparison.

 

[murray]

There is something alluring about dissimilar triodes. My first experience with dissimilar tubes was a 6T9 compactron tube and a circuit in Nuts and Volts magazine. That amp resides in a friends wood shop with a nice set of homemade speakers. It still sounds great but the S.E.X. amp is better in every way.

It should be noted that the 6T9 is a triode-pentode and the 6DN7 is a dual triode so it isn't an apples to apples comparison.

What do you mean by "dissimilar triodes"?  Is this specific to the design, or just the choice of tubes?

 

[Natural Sound]

What do you mean by "dissimilar triodes"?  Is this specific to the design, or just the choice of tubes?

The 6DN7 has two triode sections in one glass envelope. Section 1 and section 2 are different in size, amplification gain, voltage, current, power dissipation etc. Therefore the sections are "dissimilar." In the S.E.X. amp the first section (the smaller one) is used as a voltage amplifier and the second section (the larger one) is a power amplifier. The tube was originally designed for use as a vertical oscillator / vertical deflection amplifier in televisions but it works excellent for audio use as well.
http://www.nj7p.org/Tubes/PDFs/Frank/093-GE/6DN7.pdf

 

[murray]

The 6DN7 has two triode sections in one glass envelope. Section 1 and section 2 are different in size, amplification gain, voltage, current, power dissipation etc. Therefore the sections are "dissimilar." In the S.E.X. amp the first section (the smaller one) is used as a voltage amplifier and the second section (the larger one) is a power amplifier. The tube was originally designed for use as a vertical oscillator / vertical deflection amplifier in televisions but it works excellent for audio use as well.
http://www.nj7p.org/Tubes/PDFs/Frank/093-GE/6DN7.pdf

Thanks for the explanation. I guess the different specs of each section determine which function they are allocated. It's interesting that they can be used for other than the original purpose (video deflection).

 

[Adamaley]

Sad to hear that the S.E.X is being discontinued. After having my crack for a few days, I just knew that I had to move up to the S.E.X. Different sounds, but being a planar guy at heart, it made loads of sense. It never disappointed me. The power delivery was always on the money, and it is musical as hell.