Totally avoid Russian variants they are all dry and cold! Go NOS!
Sample and judge for yourself.
Upscale is a good source. The owner is sometimes prickly to deal with IMO.
Another good source is tubeworld.com - Talk to the owner - he has common sense, is honest, and gives great advice. lots of hard to find NOS tubes. good, easy to use website
Sample and judge for yourself.
Upscale is a good source. The owner is sometimes prickly to deal with IMO.
Another good source is tubeworld.com - Talk to the owner - he has common sense, is honest, and gives great advice. lots of hard to find NOS tubes. good, easy to use website