I got this amp in a state of disrepair (as I do most of my sh*t) I decided I needed a spare 50 watter and modded this amp pretty close to 1986 specs about 14 years ago ...only difference is I used a 220uf bypass cap rather thhan 330 and I used a 250pf brite cap. As one who appreciates Marshall history,I kinda regret doin' the mods .........but hey,tone is tone ...... I probably hadn't gigged with it since 2011 maybe ..it's been sittin apart in my closet since ,waitin for some TLC .I think I'd robbed the power tubes out of it ,like some GE 7581's or somethin like that . My GF's place and mine are 6hrs away ,so when I go to my house ,I grab a handful of "projects" to take back with me ...this one finally made the list . I had a box of mixed up EL 34s at her house and found a couple that matched up fairly well . Slapped it back together n fired it up .Sounding pretty good . Now Im pissed (that doesnt mean drunk,English guys) that I forgot the back panel .I think this thing's ready to get back in the van I got a little clip ,although it's hard to get a good sound in this room No. dont listen on your fckn phone !