Langerex has got back to me and is sending me a new pair of Kt63s, which would be these:
https://www.ebay.com/itm/276228142648?itmmeta=01HVV17NFEGNYHC9JGXP18YSS8&hash=item40507af638:g:NQkAAOSwvGVlevo7&itmprp=enc:AQAJAAAAwLiXtI2exqCoqfZQamte9Pj8IYWTRv1VIWq8lq5c7S/LeIL+ivFGac7CLfh37kcgRFpaslt2DMJR7yJ0/v3Odo9MkhDSQRPQkov8LMOpH+GIEm1/eJWQRK4pzaJSzdG79H35qERwFvmgHqsctqcmGHBornwWQPFkH7pK7nSgE6xfAgy0ojTUUH/9IaNHehngA2VDEqzUv5hH79DjJlvT36TmcvCbadU82ninn4xf2rw87FQgIlzTNdPuIEAJEDNa2A==|tkp:Bk9SR-LXnuHeYw
I can keep the ones with the black glass as the first pair.
Damn generous of them,Us dealers usually ask for it back and takes a long time if you buy outside the USA.
Consider myself really lucky.
The sound of the Tungsol 6SU7 gty is breathtaking, full mids, very nice vocals, beautiful low end, rich bass.
A lot of things bubble beautifully and flow like caramel.
The details are also very nice, even on loudspeakers via Ultmate I can hear them from the living room.
It feels like I'm standing in front of it but I'm two rooms away.
I'm sure the EL34 Sed also contributes something, it's a mega good pairing.
On Atrium it's just pure enjoyment at the highest level.
Everything is there and sounds less enveloping which is typical of Atrium, instead it picks you up with every note and shows you what the music is all about without overdoing it.
Nothing is hard or too soft.
Fanatical driver tube this Tungsol, the Tungsol signature remains here, musical, clear, transparent, open, rich in detail.
I find them a touch warmer than the Ecc35, which is a bit more sterile from memory, but I have to say that I haven't yet compared them with the EL34.