Thanks Steven. Would also appreciate your opinion of these compared to Red Base 5692 and TJ a Fullmusic.
Alcarp the RCA 5692 - 6SN7 valves are rich and full with liquidity and weight, great timbre, Plus they are not bright, but are a little dark and slow.
I have 2 TJ Fullmusic, 6SN7 and they are surprisingly good. All the modern tube characteristics, Clear clean, extended, some would say neutral, but they are a bit lean for my liking, in the long run the best vintage tubes are still better, Example a Mullard brown base ECC32, also another good tube is the Mullard Black plate large brown base ECC33, I can say you will not be unhappy with the TJ Fullmusic 6SN7, but they are not that cheap. There are many very good vintage tubes at that price. The 1950=60s red logo Brimar 6SN7 is a perfect example, sweet pretty clean, similar to the fullmusic 6SN7, but I bet the Brimar will have a longer lifespan.