Techdeth
RESIDENT ROCK PROFESSOR
Dude I hate kt88s . But in my Bogner it was the shit
H
harddriver
Well-known member
Another EL34 tube you may want to look into is the Tung Sol reissue EL34B or EH 6CA7 tubes. Both the EL34B and EH6CA7 have 6L6 characteristics. I am a 6L6, 6CA7 guy myself and I have picked a duet up to try in my Cameron HGJose amp that can run anything from 6l6, EL34's to 6550/KT88's. I also picked up some JJKT77's as well. I still haven't swapped out the 6550A's yet.
I have also compared the EH6CA7's to my Sylvania 6CA7's in my 68 plexi and the EH are very close sounding and currently pulled my sylvanias to put hours on the EH's.
The EH 6CA7 which is a true big bottle construction 6CA7 to the Sylvania 6CA7 which is essentially a 6L6 with an EL34 pinout and this will also install like for like in your Ultra Uber giving you more of that 6L6 tone and according to EH their 6CA7 can handle up to 800VDC on the plates. I'm running a quad in my Musicman HD130 that has 700 VDC on the plates and they are handling that voltage just fine.
https://blog.thetubestore.com/review-tungsol-el34b/
The Tungsol EL34B vacuum tube is likely to become the #1 choice of currently produced EL34 power tubes. The build construction is great all around and the move to welded plates will likely keep “EL34 rattle” to a minimum over time. The manufacturer claims that this tube has a hint of 6L6 in its tone thanks to manipulating the plate impedance. This is absolutely true, but the effect is most notable when playing clean and to a lesser extent when the tube is driven hard.
At lower volume settings you hear a very pure balanced tone with a bit of the 6L6 sparkle in the higher frequencies while providing a midrange that is a little less prominent than most EL34 tubes. The tubes were very open and airy. The bottom end was percussive in the 2×12 open back combo. When driven into distortion it starts off a bit crunchy like a 6L6 but as you push it, the sound blooms into that singing EL34 tone with great sustain and modest compression.
I have also compared the EH6CA7's to my Sylvania 6CA7's in my 68 plexi and the EH are very close sounding and currently pulled my sylvanias to put hours on the EH's.
The EH 6CA7 which is a true big bottle construction 6CA7 to the Sylvania 6CA7 which is essentially a 6L6 with an EL34 pinout and this will also install like for like in your Ultra Uber giving you more of that 6L6 tone and according to EH their 6CA7 can handle up to 800VDC on the plates. I'm running a quad in my Musicman HD130 that has 700 VDC on the plates and they are handling that voltage just fine.
https://blog.thetubestore.com/review-tungsol-el34b/
The Tungsol EL34B vacuum tube is likely to become the #1 choice of currently produced EL34 power tubes. The build construction is great all around and the move to welded plates will likely keep “EL34 rattle” to a minimum over time. The manufacturer claims that this tube has a hint of 6L6 in its tone thanks to manipulating the plate impedance. This is absolutely true, but the effect is most notable when playing clean and to a lesser extent when the tube is driven hard.
At lower volume settings you hear a very pure balanced tone with a bit of the 6L6 sparkle in the higher frequencies while providing a midrange that is a little less prominent than most EL34 tubes. The tubes were very open and airy. The bottom end was percussive in the 2×12 open back combo. When driven into distortion it starts off a bit crunchy like a 6L6 but as you push it, the sound blooms into that singing EL34 tone with great sustain and modest compression.
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