Yo Sorr, I've worked a bit on my culture vulture lately with some simple mods and improvements. Took some pics before putting it back into the rack. Maybe they'll help you out, or inspire you
I've had it for several years, but it has never worked right - until recently. Been trying to reach the Thermionic guys, but they have never replied on my emails! So, when I opened it, I found lots of solder mess all over, and several bad poorly connected wires. And at a closer look, I noticed that two pots (bias) had different values on each side- plus that the EQ had different caps on each side. :evil: It is obvious that they have sold me a f….ing prototype! (and I have changed the tubes 4 times, thinking that they were the ones that were messing it up) ...anyway,
First, after putting the 10K Sowters on the input, the sound just blossomed. Then dual stepped attenuator on the bias helped me stabilize it, plus two new 100K pots on the input (“drive).
I also changed the caps on the EQ filter, bringing it up to 7000Hz and 10000Hz cutoff. The original 4000Hz is just way to low. I was planning to install output transformers to (10K) but I’m not sure that it’s necessary anymore. Sounds nice enough to be used on the masterbus now!! This unit finally kicks ass. very inspiring indeed.
inside pic after cleaning but without mod :

top - without mod (oh there's two different caps here too):

top - (with my mod!) with stepped attenuators and input transformers:
