Replacing Sovtek 6922 for NOS

I replaced the NOS Brimar 6922s in my power amps with Amperex 6DJ8s - first the Bugle Boys and then the Orange globe A-frames. Both were a *major* improvement. The BBs are a tad warmer and a little less detailed than the A-frames. I ended up running a mix of the two.

Find out from the manufacturer if 6DJ8s can substitute for the 6922s. The 6922s have a more"rugged" electrical spec than the 6DJ8s, hence the latter may not last very long in that circuit or produce sonic anomalies. The reverse is not true; 6922s can *always* replace 6DJ8s.

I've just decided to mod my Pathos Logos, and lo and behold, here is all the advise I could hope for, well from the remainder of my research the Telefunken e188cc seems to score the most merits, but for me now I've just got my hands on some JJ Tesla e88cc and am looking at some mullards next month, I'll keep this thread posted.

I agree the bass on the pathos is a tad bloated with my full range rig. The only other thing I miss since changing over from my CHORD SPM1200B/CPA2800 combo is the grin inducing dynamics, in every other department the Logos has it licked and then some. Any advise on regaining that'control' I sometimes pine for?

keep this thread active as I'm sure the Logos will attract many modders in the way them tubes are so easy to get at.

what's the advise on displaying tubes- mini wineracks:) testube holders;) or keep em boxed?

I am using JJ Tesla E88CC tubes on my Logos successfully,JJ tubes have good clearity with a bit warm tad and good dynamics
mid band sound with enough body which many other brands mentioned sound lean (like a ss Krell sound)comparing to JJs
the only negative aspect of jjs ,low bass a bit short and shy
but I tamed this with Virtual Dynamics Master powercord,and now I never think to upgrade my amplification,even with famous
seperates.
Ben

A twist of fate meant that my plans to experiment with the JJ Tesla E88CC where put on hold and instead I procured a pair of Brimar CV2492 not CV2496 as I am wont of calling them. There are quite a few valves bearing this name, OEM issues withstanding their pedigree seems blurred with Mullards GECs and even Amperexes. They have a ring of studs on the shield that throw back a glow all around the inside of the tube and star like protrusions on the main body of metal work. Gold pins.
The result, an outstanding improvement over the Sovtek 6922 although subjectively you might prefer the Sovtek bass in your system. Smooth and atmospheric with attack and great mid layering, revealing every nuance, highs splashed and tingled with focus and natural decays. In the first 12 hours they lacked a little menace but once settled in they could strike with bags of intent when needed. Brings older recordings alive and can make some modern ambient stuff sound down right eirey. What now? JJ/ Tesla are 1/4 the price, Telefunken, Siemens, Amperex are 4 x the price. Time to settle down for a few months.