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RE: Question about matching tubes between phono pre-amp & headphone amp

Posted by Mechans on February 20, 2017 at 21:50:00:
The 6922s are not easy to find at a low price, I am afraid a real world pick would not fit into your budget.
If you want to damn the torpedoes, then look for white label USA Amperex some are designated E88CC, another fine tube is the Siemens 6922. Mullard made several styles of the 6922ranging in warmth knowing that most 6922s are not really warm, to sparkling. The tube I use is the CV-2493, Upscale Audio once carried them, they are not a budget tube.
There is an old FAQ on 12AX7s you should be able to find on this site. It concluded that 5751s were the way to go, but for a Phono pre it's probably not because of the reduced gain. Old stock Mullards are warm for the most part esp. 1950s long plate Blackburns. Philips also made Amperex, Valvo and Miniwatt. Your best buy for a British tube might be Brimar.