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EL34 SED, Black Sable or Genelex Gold Lion?

I am currently using the new production EL34 SED, bought from tubedepot.com, and are very pleased with the result in my Manley Snappers. However, I am curious and still searching after new constellations of tubes in my amps. It is part of the fun. And here is my question:

Have anyone compared the EL34 SED with the Black Sable edition of the same tube?

And, how is EL34 Black Sable compared to the Genalex Gold Lion KT77? (almost the same price)

Any experience with these tubes?
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bjesien
1,283 posts
 
Seems like the GGL KT77 might be the tube of choice. Can the KT77 be used in an amp that runs in either ultralinear or triode, like the VAC Avatar or the Manley amps? I thought I saw somewhere that it is designed for ultralinear use. This confused me because I've also read it's a drop in replacement for the EL34.

Thanks so much for the help.
tommy583
73 posts
 
Bjesien,
My amp is a Dynaco ST-70, but it is wired in triode. The guy who built my amp(Will Vincent) sent it wih JJ KT-77's. But all three of the tubes mentioned in this tread blow the JJ's away.
ajackson1
156 posts
 
the KT77 works on in my amp in either modes, not sure why a mode will make a diff, but I may be wrong.
bjesien
1,283 posts
 
Talked to a tube guy named Jim about it and he says they will be fine. I'm going to give them a try. Will post follow up. Thanks again for the support guys.
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