by justmikey » Sat Jul 28, 2012 8:11 am
I am just finishing up my new Eiclones and its time to get a quad of decent tubes. I have the rev B boards with 485V B+, fixed bias version, with Edcor 380-0-380 PTs and 4.3K-8 OPTs. I am considering ordering a set of the new production Tung Sol 6550s. Anybody out there use them in an Eiclone? The other option would be some KT88s like the Gold Lion. I love the look of the Tung Sol and they seem to get good comments on the various HiFi boards out there in internet land. My concern is the voltage ratings on the 6550 vs the KT88. The 6550 has a screen rating lower than my B+, BUT I have heard many times that this rating is somewhat negotiable when running in UL. The rating is more applicable to standard pentode operation. So... has anybody run 6550s in an Eiclone with its 485v B+? And what would the KT88 users recommend for a tube - the Gold Lions are pricey, are the EH any good? Is the JJ quality decent these days? Thanks