Old tubes vs New tubes


My Melody I880 integrated has been running the same set of KT88's for several years now. Lately they started going soft, getting noisy, sometimes kind of a white noise, sometimes kind of a pffft sound, different levels, at idle never during play. Okay well they are shot.
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Trigger warning: Tube amp voltage is lethal. Lethal means you could be killed. Seriously. Electricity is really really scary lethal. Heat too. Skin grafts hurt a lot. The following information is of a graphic nature. Do not continue if you are easily disturbed.
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The tubes are really hot from music so I go out and get a cotton towel to change em out. There's an old set I keep around just in case. Lotta hours on these as well but curious to see how they compare I plug em in. Right away, faster than I can change a side anyway, there's this electric zapping sound and I look and see this really cool Tesla coil blue-white mad scientist electrical storm going on inside one of the tubes. Cool as it is I figure this is probably one of those times when less is more. Off goes the amp and off goes me looking for another set.

Ahh, here we go. Brand new (probably) Svetlana KT-88s. Plug em in. Power on. No zapping. No smoke. Okay. Back to Brother's in Arms, Side 3 of the MoFi 45 set.

Right away it seems like nothing has changed, no wait, it is a little more open and extended, little more detailed. The longer I listen though, its like someone's in there turning this great big knob slowly, ever so slowly, up and up and up. And this Gnome, he's got this control panel chock full of knobs- Bass, Midrange, Treble, Imaging, Palpable Presence, Detail, Dynamics, Punch, Slam, on and on, and he starts out scrambling like mad between them but then after a while he gives up and starts straining away slowly turning this one monster knob labeled EVERYTHING!

I love this guy! Within a few minutes its obvious the bass is more extended and a whole lot tighter. The highs are crystal clear, airy and free of mist. The whole presentation is so freakishly dynamic I can hardly believe it. There's a wood block, at least I think its a wood block, but every time he hits it it makes this CRACK! that is so powerfully there you feel it in your chest. I feel it in my skull! Which itself is impressive considering how thick my skull is! There's a bass line that's so articulately and precisely delineated its like you can tell the guy had his manicure at Gene Juarez and not the cheap Korean place. Knopfler is palpably present like never before, he just had a sip of Evian and not the sparking one either and yeah I know BIA is maybe the best MoFi of all time SQ wise but come on! 

Few minutes later I walk out and try and tell the wife about the blue-arcTesla tube. But she cuts me off. "What was that last? It sounded like a concert. It was BETTER than a concert! What did you do?"

People strain to hear differences between tubes. My wife heard this through the listening rooms closed solid core weather-stripped door. Before it sounded like a tube amp. Now it sounds..... amazing.




 




128x128millercarbon
I used to spend money on NOS tubes and have discovered some new production sounds superior IMO. I'm off the NOS carousel now.
In KT88’s I’ve run Svetlana, JJ, Tung-Sol, and Melody. At least they say Melody. But its a Melody amp, probably they screen it on, who knows who made the tube.

Before the Melody, in my Aronov we ran all those same brands of tubes, except that amp would run 6550 or KT88 so both were tried.

What I can say, its not that there aren’t differences between tubes. There are definitely differences between tubes. But to what degree? That is the question. My answer is, not much. I can get about the same degree of change by spraying anti-static, or demagnetizing. I can get the same or more by putting up just one HFT or sticking one ECT on the amp. A whole lot less than one Blue Quantum Fuse.

So the difference between a set of the cheapest JJ at $178 and the most expensive Tube Store at $272 is about $100 which is in line with other things one could do.

This is when comparing relatively new tubes. Obviously according to what I just posted, comparing really old worn tubes to new ones is a whole different story. A lot of what people are hearing rolling tubes may really come down to differences in age, warm-up, etc. Its not always that close but in my experience it has been.

Now with relatively new tubes (Tube Store matched JJ’s, actually the cheapest ones!) listening last night I heard a whole lot more inner detail, dynamics and good old tubey magic than my old tubes had been giving me. While tubes have proven reliable over the nearly 30 years I’ve been running them, still don’t like being without a spare set. So I just ordered a matched set of the Tube Store brand KT88.


tuberist
I used to spend money on NOS tubes and have discovered some new production sounds superior IMO. I’m off the NOS carousel now.

The only one I am curious and might actually try is the EAT KT88 Diamond. At about $400 each a set is about what I paid for my demo no warranty Melody. Come end of year if all my necessaries are done, I’m flush, and the TubeStore guys are able to convince me, then maybe with all that I might give them a try.

Getting into that price range though, I still have my Aronov integrated. Something wrong, it blows fuses. When it worked though- magic! A lot of tube magic I think comes as much if not more from the transformers. Plus the Aronov has been modded with a lot of high end caps and stuff. One of those projects for when I have enough time and feel like learning to master the next new thing.
Miller, I agree the "transformers' in a tubed rig are arguably the most critical piece of a good sounding design. I still hear well enough that I can tell the differences in most tubes, when rolling. And especially the driver tubes.