Responses from bradf

Vienna Beethoven Baby Grand , PrimaLuna compatab
Thanx for your inputBrad 
Substitute 5V4G tube for 5AR4 tube
Rodman99999Thank You for your advice. I will need four, 2 ea for the preamp and 2 each for the cd player.The tubes are somewhat spendy, but it seems the sonic upgrade in replacing the Chinese tubes should be a pretty good value. All the tubes I ha... 
Substitute 5V4G tube for 5AR4 tube
Thank You very much Viridian. You have been very informative. I will probably look further into the 5963 and 6680 tubes.The owners manual of the referenced components states that the 5V4G tube can be used in place of the 5AR4 tube but to expect so...