KT77 in Diezel amps ?

  • Thread starter Thread starter Peter Diezel
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Peter Diezel

Peter Diezel

Well-known member
Hello Guys,

after a long search for a reliable tube we checked
out the KT77-JJ in several amps.

I liked it very much because of the details and harmonics.
It has the EL34 vibe but less compressed and less upper
midrange spike.

The tube has a rating of 800 volt plate voltage and
800 volt screen grid voltage which will avoid a lot of
issues. It seems very well constructed.

What´s Your opinion ?

Happy new year,

Peter
 
If it is good enough for Peter, it damn sure is going to be good enough for me! :rock:
Who are any of us to doubt the words of Peter? :gethim: :confused: :lol: :yes:

Olaf put those tubes into an amp he sent recently and I have to agree, that these tubes offer the best of both an EL-34 and a 6L6. What more could anyone ask for?! :worship:

Thank you Peter for researching and finding yet a better tube for your amps.
BB
 
Peter Diezel":1xa4td7c said:
Hello Guys,

after a long search for a reliable tube we checked
out the KT77-JJ in several amps.

What´s Your opinion ?

Happy new year,

Peter
Click to expand...
I tried out exhaustively both a sextet of JJE34L & JJKT77 to a/b with for about a week of heavy testing with my Herbert 001/334.

I found that the JJKT77 is very nice and rich (like most JJ power tubes) but not quite as tight with the obvious punch of the JJE34L. However the JJKT77 is tighter than the JJEL34. Needless to say, (but I'll say it) the Ruby EL34B-STR doesn't line up as well at all in any aspect of these characteristics, especially in the lower register where the Ruby EL34B-STR tends to get lost and begins to diminish clarity and suffer articulation.

The JJKT77 produces and exhibits a somewhat loose low end range similar to the Ruby EL34B-STR territory which I personally (what you asked for) do not care for in a super sonic flexible amp - like Herbert.

Overall, IMO, the JJE34L has a more aggressive punch, a more ballsy wider tone grid and a much "nicer" midrange extension to it than the JJKT77. It cleans up very well with the guitar's volume knob a tad better than the JJKT77 (clean or hi-gain) and has a very nice glistening ring to it on the clean channel - especially with a good Strat set to 2 of 5 or 4 of 5 on toggle. On channel 2 & 3 of Herbert, as they say in Rambling Jack's Laboratory - Fagetaboutit!

David
 

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I really dig the JJKT-77 in the Herbert. I went back and forth between the KT-77's and SED EL-34's and the KT-77 lends itself more to a hard rock vein than say a heavier tone (which is not what I was going for).

I would agree that it definitely has a looser feel than the EL-34, which gives it a more Marshall-esque flavor in the bottom end.

Matt
 
oh man, I have KT77 in my Vh4, Olaf suggested them to me and I must say they RULE... I had 6L6 in the Vh4 when I bought it and I have EL34 in the Eistein and I absoltely LOVE the KT77 because the cleans sound very 6L6 like but the distortion still sounds VERY EL34 ish
 
I think the KT 77 is a great tube. I also see the the quality and dependability of the EL-34 tube getting worse and worse as time goes by. Those tubes are not what they used to be. The design of the KT 77 and it's ability to handle higher plate voltages etc. make it a great choice based on the characteristics of Diezel amps and how they sound in my opinion. I have to agree from a technical side without a doubt. From a musician/guitar player side I am also in favor of this because it really works well sound wise. I find the KT 77 to be a tube built with the future in mind from the tubes design characteristics. This also lines up with our Diezel philosophy so all I can say about this is.........WIN!!! :thumbsup: :rock:
 
King Crimson":1nrvdmbr said:
Peter Diezel":1nrvdmbr said:
Hello Guys,

after a long search for a reliable tube we checked
out the KT77-JJ in several amps.

What´s Your opinion ?

Happy new year,

Peter
Click to expand...
I tried out exhaustively both a sextet of JJE34L & JJKT77 to a/b with for about a week of heavy testing with my Herbert 001/334.

I found that the JJKT77 is very nice and rich (like most JJ power tubes) but not quite as tight with the obvious punch of the JJE34L. However the JJKT77 is tighter than the JJEL34. Needless to say, (but I'll say it) the Ruby EL34B-STR doesn't line up as well at all in any aspect of these characteristics, especially in the lower register where the Ruby EL34B-STR tends to get lost and begins to diminish clarity and suffer articulation.

The JJKT77 produces and exhibits a somewhat loose low end range similar to the Ruby EL34B-STR territory which I personally (what you asked for) do not care for in a super sonic flexible amp - like Herbert.

Overall, IMO, the JJE34L has a more aggressive punch, a more ballsy wider tone grid and a much "nicer" midrange extension to it than the JJKT77. It cleans up very well with the guitar's volume knob a tad better than the JJKT77 (clean or hi-gain) and has a very nice glistening ring to it on the clean channel - especially with a good Strat set to 2 of 5 or 4 of 5 on toggle. On channel 2 & 3 of Herbert, as they say in Rambling Jack's Laboratory - Fagetaboutit!

David
Click to expand...

Were you able to tell much difference between the Ruby's and the JJ's at lower volume levels? Not talking bedroom levels, but not gig level, either. I have 2 matched quads of JJ E34Ls, and cant decide whether to try em in the Herbert, the XTC, or just save em until I need em. The Herbert is so damned easy to bias, though, its almost a no-brainer to just try em out, but I'd like to get opinions first if possible.
 
Where can I order the KT77 (and other tubes) for fair prices and good quality in Germany? Any recommended (online)-shop? Thanks a lot :thumbsup:
 
BigR":3uu7m07h said:
Were you able to tell much difference between the Ruby's and the JJ's at lower volume levels? Not talking bedroom levels, but not gig level, either. I have 2 matched quads of JJ E34Ls, and cant decide whether to try em in the Herbert, the XTC, or just save em until I need em. The Herbert is so damned easy to bias, though, its almost a no-brainer to just try em out, but I'd like to get opinions first if possible.
Click to expand...
Oh yes. Now don’t get me wrong here, the Ruby’s are very good and reliable power tubes, but the JJ power tubes (although did have some reliability issues in the past) are just great all around dynamic and consistent power tubes. You’ll notice that I emphasize JJ’s power tubes, because the JJ preamp tubes are not my cup of tea, to any extent for my style of playing. Also, I’m not letting go of my sextet of JJKT77s for future enjoyment. I wouldn’t however, recommend that one mix the JJKT77s or the JJE34Ls with any other tubes of that variant or otherwise in Herbert, for that matter.

So to answer your question, for me yes, at any volume I hear the difference. What’s very nice about the JJ power tubes in Herbert is the openness it produces (and I can’t speak to any of the other Diezel amps at this time.) And the player immediately gains a much more touch-sensitive (even though you have it to varying degrees in Herbert regardless of power tube choice) response in the dynamic of the amp and this becomes much more significant and noticeable to the player who is privy to this type of extension of vibrancy and feel.

David
 
Flavatrocious":3vskasbb said:
What do you bias these KT77's at? In a VH4.
Click to expand...

The KT 77 characteristics are in alignment with the EL 34's. Between 60 and 70 ma per tube pair. I am at 65 ma and very happy.
 
At Tube-Town i only find the "KT77 RED LABEL"... What means the "red label"? :confused:
 
Well, "red label" just informs you about the coloring of the label on the tubes :D Nothing more.
Those are the JJ KT77 everyone is talking about ;)
 
Thanks a lot ;) How much does the Bias-setting change the sound? Does 60mA sound different to 70 mA? In which way and why will there be a difference? I think I´ll do a little testing/experimentation-session soon :)
 
Hartmut":1vlsoiy5 said:
Thanks a lot ;) How much does the Bias-setting change the sound? Does 60mA sound different to 70 mA? In which way and why will there be a difference? I think I´ll do a little testing/experimentation-session soon :)
Click to expand...

65 ma is where I would be on those. :thumbsup:
 
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