All right--mine showed up late last week, and I am taking the opportunity to break in a new cartridge as I do the Cornet3, so I really won't have an idea of what it sounds like with its stock tubes for a few more days, but it is very nice indeed right now. Any crystalline weirdness I hear I blame on the new cart for the moment, as my last one was similar while breaking in.
My question for you extremely helpful folks:
Got a bunch of tested vintage tubes from sellers with excellent feedback on that auction site...I just hope they actually DO test them and they don't fry my new Cornet. But I figured I would double-check before actually trying to use them. The one audio repair place near me in town that I called to ask to test my tubes actually sneered at me over the phone--"waste of time to test small tubes; just plug them in and see if they work". Hm. Really? Sounds pretty fishy to me, but this is my first go-round with valves, so what do I know?
I have two vintage Mullards, two Amperex, and two Raytheons to try in the 12ax7 spots, and one each Telefunken and Mullard for the 12au7. (Into a typical 90s solid state receiver.) Now the permutations and combinations are making me dizzy before I even begin. Should I first try the Telefunken and Mullard 12au7s with the new "stock" 12ax7s and see if I can hear a noticeable difference? Try two 12ax7s and leave the stock Electro-Harmonix 12au7 to see what THAT does? Swap all three? It is enough to drive one batty. Which tube does what in the circuit, and what is going to have the greatest effect?
The good part is I can record all the experiments to keep "notes", and have an objective spectral readout of what happens, but as you know, it is what the ears hear that matters. I am almost sorry I got myself into this (my Bugle Elite is fantastic). And if one of these ebay tubes catches my house on fire, I'll be even more pissed. Any advice would be most welcome...thanks in advance.