Since I have my soon to be stash coming I thought I would put this out there. The 6BR7 and the Eros are really nice, I have really, really enjoyed this tube. It does require a pin-out change or you can order a nice adapter from
jamesbacik@sprintmail.com for $30, which is what I did. Custom made and he did a great job. This is really in the spirit of Bottlehead experimentation and fun, not necessarily Bottlehead frugality since the tubes cost $10 each, plus the adapter if you don’t want to do the pin change yourself, and very nice old stock Russian EF86 can be had for $5. Still a lot cheaper than NOS Mullard EF86 though! I really enjoy being able to use Brimar 6BR7 and have decided, for the moment (ask Grainger, I change my mind often), that I like these the best of any I have tried. So I thought I would pass it along for those who are interested in playing around with tube types like I am since I have bought bunches of these tubes for myself now and don’t care if the price goes up!