EL-34: JJ Tesla or Electro-Harmonix?

How much is the Cryo Svetlana and where can I find them? Is the KT77 a drop-in replacement for the EL34?

From my experiences the JJ Tesla's had the most bass and the sweetest midrange. ( of current tube productions ) The Svets lacked in bass, and I thought the Electro-Harmonix were just plain blah. But I suppose it depends on the associated equipment.

I recently went thru your exact situation and found the following:

Tesla's: an unoffensive tube, evenly balanced, but just a hair lean in the midbass

EH: Very lean, a sibilant bite in the mid treble, didn't make me want to listen

Svet Winged C: Yes. Smooth, balanced, no edge, great bass, makes me want to listen

A group of us (Mechans, BadBoss429, Audiogon dealer Quest For Sound - Stephen Monte, and a few of our other cohorts) recently conducted a 3 step Tube Shootout that I'll write up here on Audiogon one of these days using the following:
JJ Blue Glass E34L
JJ KT77
ElectroHarmonix EL34
Mullard EL34 XF1
JJ Blue Glass KT88

In my opinion, if you want the best EL34 made today, it's the JJ E34L.

Currently, in my Jadis amp, I'm running the JJ KT77. Far more powerful low frequencies than the E34L, but the E34L's midrange is much better. More or less a question of which you want more.

In the end, I'm just going to have both on hand, and switch between them based on the music, mood, etc.

Interesting shootout Trelja! Too bad you couldn't incorporate the SED "winged C" EL34s in there somehow. Looking forward to your write up, especially your results compared to the $$ Mullard XF1s.

I will be going thru the same thing myself, comparing the JJ E34Ls, JJ KT77s, SED Winged Cs, and NOS Mullards, all on a pair of the excellent Dodd 120 monoblocks.