I was wondering whether you could use a JJE34L, which has a slightly higher grid voltage rating (-13.5 to-16.5 vs -10 to -13.5 volts) than the traditional EL34.

If not what kind of EL34 would be a good match for this circuit?

I'm considering flipping Jim McShane email asking him about the ones he carries. I was wondering about the Winged C. They are getting expensive.

Myself, I've never liked the sound of KT77s but I've never heard them in a Decware amp. Still, the Hazen Grid mod doesn't affect that tube type.

I've used a pair of EL34 Mullard Reissues in my Integrated .2 and they were very very nice. One of these days I'll try a quad in my Torii.

Interesting. Thanks for sharing.

So far, I have preferred the tubes that came with my amp-Tung-Sol. I did try a pair of Rubies, and all in all, they were less detailed,but great for some music. I went back to the stock tubes after missing a bit of detail. Of course, other factors are important in tube play,  speakers/room/preference.

I started out with the mullard reissues , typical mullard, very good , clinical low noise , changed to tungsols more euphonic very good , and as much as I hate to say it because of the trouble I had with them the JJEL34 seems the best in the Racheal so far, now these tubes may have not gotten a chance to breakin properly , but as of this moment I like the JJ's. not the 6ca7s just plain old EL34's!!

Purchased a new VPI Scout 1.1 3 weeks ago, so this week I bought some new tubes. Wonderful table...was real fun to setup..o ya right. Did cuss a few times.
Have a SE34.4 can see setup below.

Comparing 6CA7 JJ's from Cryoset against Shuguang 6CA7-Z treasures. Also comparing 6N1P's against 1960 NOS Amperex 6DJ8 white label made in holland . The amperex and JJ's have 6 hours on them while the 6n1p's and Treasures have many hours on them.
1. The Treasure and 6n1p combo have been my go to setup for awhile.  Clean sounding bass, good air , open no issues, great with instruments and voices.
2. Now the JJ 6ca7 and Amperex 6dj8 combo, deeper bass and midbass, less air on top (not by much), bass is really rich but woolly or warm not as clean as the Treasures and 6n1p combo. Instruments and voices are wonderful. I'm a bass junkie so I like this setup.
3. Mix and matching these 4 sets of tubes is fun, the Amperex has the deep richer but wooly bass. The 6n1p more air in upper registers tighter bass, and a little more inner detail. (very little)
4. The JJ and Treasure 6ca7's aren't that different sounding to me, the JJ's have more bass and are a little darker and slightly warmer.
6. This is interesting to me because the Treasures are over $100/pr and the Cry'd JJ 6ca7 are $45...
Long live Decware