Where for a tube-newb to start?

Quick, give it away to Goodwill. Otherwise you will acquire an 'addiction', which of course will leave you broke and deeply depressed. Their is no known cure, other then to go 'cold turkey' and give it away, and do it now. Sadly, others have not followed my advice and now they are looking for 12 step programs, but beware, those programs often meet in bricks and mortar audio stores and you hear all kinds of 'sweet' sounds that never cure you.

Think he was wanting to read up on tube amps and tubes, and read reviews on tubes he could roll in.

Thanks for all the replies!

@Zd542: I am not looking for an amp review. I have inherited the amp from my brother-in-law (RIP). I do not know what tubes may be in the amp at this point. He and I had similar musical preferences, and a tendency to tinker, so I suspect that 1) the tubes that are in the amp are not stock, and 2) I will like what’s in it when it arrives. At the very least, I will have to replace tubes as they go bad and was looking for advice on high-quality replacements, reliable tube vendors, and good sources of background information and in-depth tube comparisons.

@Rodman99999: Thanks for the links!

@Whart: I tend not to seek out the anecdotal, “you really need to listen to ______” (fill in any particular component), reviews. I’d be more interested in thorough, systematic reviews of a variety of tubes with ratings in a variety of categories. I don’t have sufficient background to know what those categories might be. I’m on a relatively steep learning curve at the moment.

@Wolf_garcia: Great link! I wish they had my M520 in the “Shop by Amp” section.

@Buconero117: LOL… Hi, my name is Brian and I’m an audio-holic.

@Bajaed: You said it much more succinctly than I did above.

Cheers... Brian

Tand- I'm not sure, apart from old issues of the Tube Valley? magazine, maybe Glass Audio, mentioned above, that you'll find much in the way of scientific comparisons of tubes. There are tube data sheets for many tubes that are available for old tubes that compare specs. If you run a search for tube data sheets, you'll see what I mean, but other than electrical compatability, not sure those will tell you much about the sound.
What I was referring to was less of a commercial review, and more about user experience posting comparisons of different tubes in a given component (recognizing that different circuits may affect the outcome). I have posted such comments in various fora regarding comparisons of various rectifier tubes and my experience in rolling tubes in one of my phono stages. Garcia's reference to The Tube Store can also be supplemented by descriptions of various tubes on the Tubeworld website. I've bought a number of NOS tubes from him over the years. Good luck.

I've built kit amps and preamp, owned probably twenty different tube amps and probably even more tube preamps, and I have rolled many different tubes each with many manufacturers. Were I you, I would find out what tubes you have in there and go to audioasylum "tubes." and inquire about the best.

There are new tubes to be had, but in my experience those around the time of WW II were the best, but are almost unobtainable anymore. Forget trying to find Western Electric tubes unless you are very rich and in Japan.

Have fun!