This has taken me on quite a journey. some of you may recall, i started this last October. my original idea was to scratch build a Vintage style amp in a 1934 Art Deco Tombstone radio cabinet, using oddball tubes i had on hand from another tube amp i dismantled. my first idea was to use a Grid Leak Biased 6SJ7 pentode preamp with a Bone Ray tone stack to a very low gain 6J5 octal, to a vintage, big bottle 6L6. i couldn't get the grid leak bias to work. or at least i DID, but it was noisy and i didnt like it. changed to a different tube set. 2, 6SF5 tubes i discovered online somewhere, that were Octal versions of 1/2 of a 12AX7, with a mu of 100. so i thought id build an Octal version of a 5F1 Champ, with the Bone Ray tone stack. that worked, but again, it was noisy and sounded terrible. i tried a simpler tone stack based on a Gibson G10, with the treble coming from the cathode. still sounded awful. terrible un-musical distortion and hum and buzz and squeals... come to find out, the squeal was because i wasnt using shielded wire to the tone controls, and the hum and buzz was because my grounding scheme was a disaster, and my un-musical distortion was caused by a ton of blocking distortion, that was fixed by adding a small bypass cap on the 6L6 in parallel with the 22uf, so it would discharge quicker. i reworked all that, and changed to a single 6SL7 with the Bone Ray. that worked great, and the shielded wire made an enormous improvement. BUT, when i put the chassis in my Deco cabinet, it howled mike a mad monkey! turns out, a 6SL7 is microphonic! works great as a head, but since this was designed to be a combo, this wasnt going to work either. RRRGH! so i decided to completely start over. Chassis and everything, since my layout was all wrong, i had high voltage wires next to low and criss crosses and ... frgt-it.. just start over. so i started building up another chassis, keeping all the high voltage far away from the low, moving my transformers to one side, with a minimal amount of criss crossing. and i started a new design using 2, 12AX7s, with a cathode follower to a simpler Big Muff tone stack, then using the other half of the unused 12AX7 as a parallel input on a switch. a Super Champ. i added a built in attenuator, so i can crank it in the living room, yet turn it down so the wife can still watch TV in the bedroom. then i started working out of town and didnt touch it for the next 2 months. when i got back, i began to think that my earlier designs were probably good, now that i fixed everything with shielded wire, proper grounding and that small bypass cap. so i went back to the 2, 6SF5 version, replaced the Bone Ray with the Big Muff, and attenuator. drew it up, the next day i did a layout, and the next day i installed it all in the same old chassis. not the new one, as it wasnt ready yet. Lo and behold, it sounded great! and dead quiet! which is is amazing considering what an out of control noise machine this was at the beginning! i spent another week tweaking my Big Muff circuit till i got it sounding REALLY good. and for the last 2 days i kept trying to tweak it even more, only to go back to what i had already settled on. so i guess its time to stop. today, i put it all together for the first time. i put the chassis in the cabinet, added the lady jewel for the pilot light, and secured it all together. its a thrill to see and hear this amp after all this time. ive always dreamt about using an old radio cabinet as a guitar amp, and this is literally a dream come true. im all wiggly inside. ive learned a lot along the way. i had epiphany on the math and how to use Ohms Law to get the results im looking for, regarding the load lines and estimated voltages and current draw. i know the importance of a proper grounding scheme, how much stray RF/EF there is inside the chassis, the importance of keeping high and low voltages away from each other, and using shielded wire! i feel way better prepared for the next amp. ill be making a video soon, but here are pictures. too bad i can only post 10. id like to thank @Lowerleftcoast , @mrriggs , @andrewRneumann , @Nickfl and everyone else who chimed in with help and advice.