If anyone is interested in acquiring NOS tubes for their BHSE, I've just listed 4 quads (2 quads XF2/OO, and 2 quads XF4/DD), and a used quad of XF3's.
Not much of a deal really, as I'm looking to get what I paid for them (4 years ago). Prices have gone up since, but I've listed them for what I paid (or a little less on some).
I've never used any of these tubes, other than to test them when they arrived, so they should still be considered NOS as from when I purchased them.
The 4 quads are all in excellent shape (all tested very well), and most of them came from Tube World who has a high reputation for selling quality tubes.
My experience has been any decent used vintage EL34 tubes will sound better than any of today's reissue/replica EL34 tube.
PM for any additional info or photos.
Thanks.
https://www.head-fi.org/threads/philips-made-in-holland-el34-dd-nos-tubes-for-sale.906262/
https://www.head-fi.org/threads/siemens-mullard-el34-quad-s-of-xf2-oo-nos-tubes-for-sale.906224/
https://www.head-fi.org/threads/philips-mullard-el34-xf3-used-tubes-for-sale.906279/
I forgot to mention, I will be putting my BHSE up for sale shortly, and it will be a package deal:
BHSE (black/120v) w/quads of Philips Metal Base, Philips XF4/DD halo, and XF2/OO halo
SR-009 w/SRE-950S extension cable - cable was never used
Stax SRM-1 amp (Spritzer reconditioned) - in excellent working order (good for office or bedroom)
None of the tubes listed with BHSE package deal are from the other NOS tube listings mentioned earlier