hey , i think i bought your solarus a while back, with the 6550's ...... as for this build , the builder and I dont speak anymore over this build because of the novice build at a high build price ... same day i picked the amp up it blew up output tubes in the 1st 5 min of playing , had some real bad ghosting issues which are now fixed . wires from output tranny were wired wrong , had that issue fixed ..I'm having a new schematic drawn up by nik at ceriatone , so i can start from scratch with new turret board and nos components . over the past year I had 3 tecks inside this thing and were pretty suprised to see such apoor build layout .the plate voltage is 540 b+\\ ;550 b+ and screen voltage across the 1k 5watt is little lwr[replaced the 220 ohm wirewound ] tubes didnt glow as bright with the 1k5w's .....I rewired some pre amp stuff with shielded cable to eliminate oscilating issues being that it is cascaded which was not done during original build ... [inputs to shared cathode on v1 ] ppimv wires , have 12ay7 in phase inverter, i find thatv3 tube gets quite , tried a 12at7 in there as well that gets very hot to touch as well ..i have chewed up 2 pairs of kt88 tubes tubes tying to isolate issues . now its the high voltages that got me stumped . I'M learning as I go here . if i could info on a step by step trouble shooting approach that would be great. THE PWR TRANNY IS A HAMMOND 278CX WITH VOLTAGE TAPS ON 100VAC AND 120VAC to give me the 540b+ and 600b+ , my original idea was to get it sounding as close to a real deal major in the 100 watt version . have to change out pwr tube sockets , as they seem loose and dont seat tight like they are supposed to , as per the builder he had ceramic ones , said that they were better ... I also noticed that pin 1 on these pwr tube sockets is missing , dosen't pin 1/8 get tied teogether and 1 ohm series to grnd .. does that hinder me from using like kt77's/ el34's with pin 1 missing ? also could the bias layout be wrong even tough i can get biasing ranges from 25/ 55 -mv ... when biasing around 32 to 35 the amp sounds great , when i bias 28-32 i notice the tubes get bright and amp output volume increases alot , if i bias upwards of 70% 43-45 it sounds really loose and undefined ..