Apparently these new tubes are suppose to be pretty good, some say as good as the old NOS tubes. Well it just so happens this company will be at NAMM so Faze and I will get a chance to talk to the man and see if they are all hype or what. They are made in China so I am going to assume it is from the same factory the rest of the Chinese tubes come from.
Here is some information
The PM 12AX7HG (HIGH GAIN) preamp tube will replace the same tube as the 12AX7A but is the choice if your amp needs a little extra punch. This tube deliver up to 20% increased gain.
PM preamp tubes are built to the highest possible standard and have extra screening to eliminate microphony (squeal) and excessive white noise.