I realize this is off-topic but for those who might be interested in trying different resistors in their tube electronics, I highly recommend the new Audio Note Silver tantalum resistors. They are only available as 2 watt and so may not be suitable for all applications.
I have gradually been converting my electronics over to use the AN Silvers in most critical spots, and I have been very pleased with the improved sound quality each time. The Silvers have greater resolving power, better micro-dynamics and better transparency than the resistors they replaced which include older style Audio Note Tantalums, Mills wirewounds and others. Unfortunately they take a long time to break in, 100 hours or more. Both PartsConnexion in Canada and Hifi Collective in UK carry the full range of Audio Note resistors.
I have gradually been converting my electronics over to use the AN Silvers in most critical spots, and I have been very pleased with the improved sound quality each time. The Silvers have greater resolving power, better micro-dynamics and better transparency than the resistors they replaced which include older style Audio Note Tantalums, Mills wirewounds and others. Unfortunately they take a long time to break in, 100 hours or more. Both PartsConnexion in Canada and Hifi Collective in UK carry the full range of Audio Note resistors.