Hey path09en, I don't know much about the new tung sol (the NOS tung sols are among my favourites) but I can tell you about the tubes you have.
The chineese 12ax7 is a well made, quite, very high gain tube. When I got my Two Rock SIG it was FULL of them. They are a little bright and very articulate.
The ECC83 looks a lot like a JJTesla but I can't be sure. If it is a JJ the are well know for the good mids and balanced response. Not the most exiting tube in the world but it will sound good and be there for you at a reasonalbe price. In fact, one of the best 18 watt clones I have heard was loaded with these and JJ EL84's. It sounded fantastic.
Like Ripper said, you need to swap and listen and swap and listen and swap and listen.
The chineese 12ax7 is a well made, quite, very high gain tube. When I got my Two Rock SIG it was FULL of them. They are a little bright and very articulate.
The ECC83 looks a lot like a JJTesla but I can't be sure. If it is a JJ the are well know for the good mids and balanced response. Not the most exiting tube in the world but it will sound good and be there for you at a reasonalbe price. In fact, one of the best 18 watt clones I have heard was loaded with these and JJ EL84's. It sounded fantastic.
Like Ripper said, you need to swap and listen and swap and listen and swap and listen.
