I’m going to leave it be for a week or so
hoping they have lots of hours in them
it was like finding a treasure chest a bunch of NOS tubes .
Maybe a good thing that sockets are so tight , discourages user from excess swapping lol
I changed a Tube and…
I liked it!
Have a Rogue Audio Cronos mag lll bought it years ago as original Cronos Mag sent it in last year for the upgrade to lll . Never changed any of the original tubes .
The amp was lightly used due to my changing amps like regularly. Decided to stick with Cronos and and have really enjoyed it .
Playing vinyl for the majority of time and seem satisfied with Triode mode . Amp runs perfectly no noise at all but thought about all the threads regarding tube rolling especially the center 12au7 .
pulled out the stock JJ and found a Genalex Gold Lion ECC82/B749 (12au7) bought them 7-8 years ago .
Put the GL into center position and was thinking “am I going to really hear a difference “??? Figured I listen to a few LPs and maybe I’d notice something different good or bad Maybe ? after all it’s just one tiny tube !
Well I was blown away !, 30 seconds in listening to “two of a mind “ Desmond /Muliligan things just got a whole lot more musical 🎶. Hard to describe everything seemed improved , midrange was wow ! Soundstage was better , etc .
Went to another familiar favorite Grant Green “ Idle Moments “ Oh yes the magic is here too
Is this even possible or am I under a placebo delusion lol
Now I’m really wondering what about the other 2 12au7’s and even the 2 -12ax7’s
what else am I missing ?
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OP Welcome to the world of Tube Rolling My first experience is tube rolling the Shiit Freya+ a few years back. OMG, you can hear what swapping different brands of tubes do. So, when I got my Linear Tube Audio Microzotl, I did not take chances. i used Telefunken 12ax7 medical grade and Kenrad VT231 for the 6SN7 driver For my power amp, I use NOS Bigboy's for 6SN7 and Elrog 845 the downside is $$$$$$$ But I think they last, so make a choice But again, welcome to Tube Rolling |
I had all tube systems for over 50+ years. Two years ago, I found a superior although expensive alternative: Westminster Labs REI mono amps and Quest2 pre-amp. Solid state Class A that remain on all the time using minimal power and always ready. Neutral but high resolution, full bodied dynamic sound. With 96 db speakers, fantastic. No more tubes or tube rolling or waiting 20 to 45 minutes for warm up either. |
Solid state is great , but I prefer Tubes for now . I have no problem with warm up time and some minor tweaking [ check bias , change a tube etc.. ] It's all part of the process . I'm not looking for Neutral , Looking for warmth / emotion .
I have a solid state set up as well [ Exposure 2510 + ] - it's very nice and probably a bit on the warmer side - to my liking . |
@trivemaIf it's a true NOS British made GEC/Genalex B749 it's doubtful any of the tubes you mention would hold a candle to it. If it's a Russian made tube a grilled cheese will outperform it.
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