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Posts by chinook9

1977 should be a good tube.  My experience with Russian tubes is that anything earlier than mid 80s is good.  I'm not sure the really early ones are better.  I have a 1963 6N23P and I'm not impressed by it at all.  Its a good tube but not better than some later models I have.
Looks like you're set.  I consider the TF E88CC my best tube.  I expect it also my most valuable, however, I don't plan on selling it.  I got it at an excellent price from a friend who bought a dozen of them.
 That should be a good tube.  As far as the cost, if you want it, you just have to pay it and move on.  I have 30+ tubes ranging in price from $3 to $140 and the difference is very slight in any of them, however, I enjoy playing with them.  Also, we can always put them back up on eBay and get some of our money back. 
6N6P is a good one for the Sunrise.  I have never heard or even read about the 6N27P but I'd be interested in what you think.  According to my reference document, the logo indicates it is an older model from the Reflector plant, however, I'm not sure how accurate my source is.  Presently there are some of these tubes on eBay with what is reported to be the newer Reflector logo and these are 1969 vintage. Can you read the year on it?
You've got it.   I have not experienced noticeable difference in sound quality between high gain and low gain tubes, however, I seem to remember that when I studied tubes, back in the mid 60s, I learned that high gain tubes had more potential to emphasize noise.  I don't believe any of my "favorite" tubes are high gain tubes.
I'm not sure I've seen a comparison in one guide.  The following link has a video that is helpful for 12 volt tubes. http://www.thetubestore.com/Gain-Factor
Referring to the sound level.  For a long time during tube rolling, when using headphones, I had noticed that the sound level changes many characteristics of SQ. Then recently I read a note by someone, whose judgement I trust, that after adjusting for sound level (equalizing it so the SPL is the same for both tubes) the difference between tubes is very hard if not impossible to detect (my paraphrase).    Now, I don't have great ears, but I compared my best tube (TF...
I have one.  At one point I considered it my best tube, and it probably still is, but every single tube I have (about 30) sounds excellent after I equalize volume levels.   It is not a cheap tube, but it is excellent in every way and you should not have to buy any more tubes.   You will like it.
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