#1
So I've got a Peavey Classic 50 head and it's time to get some new tubes. I looked on the back and it said it has 3 12AX7A's and 4 6BQ5's. I can't find anything but two tubes on SamAsh.com that are 12AX7A's and one tube for the 6BQ5's and it is a Sovtek EL84 6BQ5. So my question is are 12AX7As the same thing as just 12AX7s? And is an EL84 the same thing as a 6BQ5? Because I just find it strange that I could find almost nothing for these on both Samash and musiciansfriend. Any help would be appreciated so thanks in advance.
#2
http://www.tubedepot.com/

The preamp tubes listed are the kind of the same but will sound a little different, such as a little darker/more trebley/etc. not 100% sure on what the difference between those two are

The EL84's are the European name for 6BQ5 (<-- American classification) and vice versa

Also check here: https://www.ultimate-guitar.com/forum/showthread.php?t=473149
and here: https://www.ultimate-guitar.com/forum/showthread.php?t=278232

YAY for stickies