@Uriah1
I "rewrote" the article but still gave John Tempelton the credit. They say Templeton is a "3rd-party." As far as The Tube Store - they know their stuff. here is some additional comments John has made about tubes:
"AES is a fine store. However, for guitar applications I’d contact Lord Valve or Ned Carlson. These guys will test your tubes in an amp where it counts, this is even more important if you are putting the tubes into a combo. Well worth a couple of extra dollars, believe me I’ve been there. If you’re talking with his valveness ask him about the new Chinese EL34B. Killer tone and a great price IMO, much better than anything China has produced in this type of tube.
Regards, John Templeton"
"Also, what’s a good sounding > 12AT7? > Thanx!
I like the RCA 12AT7 tubes for drivers and have recently switched to NOS 5751 tubes for pre-amps. More lower noise and more clean headroom in the pre-amp and a bit tighter sounding. Just my opinion. Having said that the nature of tubes these days is such that I’ve also had $5 chinese pre-amp tubes that sound incredible. Didn’t last long but a great ride while they lasted. I’ve never been a fan of the Sovteks. Bought a bunch of the WXT selects when they came out. Noisy, bad triod matching etc. I really advise getting a couple of different types and seeing how they work in your amp. Regards, John Templeton"
"John Templeton...
Hard to find one book that does it all. My personal favorite for getting
into guitar amps is Dave Funk's "Tube Amp Workbook". Mostly Fender
Schematics but lots of good information in the first sections and some
nice comparisons between Vox, Fender and Marshall in terms of tone.
Worth every penny.
I have 3 of Kevin O'Connor s books and they are all excellent but not my
first choice for testing the waters of guitar amps. I'll be flamed for
sure ;-)"