Is the speaker a good mfg.

thanks. this thing is still a mystery on where it came from

I have a date code book it say the speaker is from Quam-Nichols 1943 1953 or 1963 and the 41st week of year.#270341. cant seem to get pic to upload

better pic.I can not find who ,what ,when or where at all on this thing

inside pics. hand drawn schematic,point to point wiring.I found this amp on garbage day at the curb took her home pluged her in and it worked fine.

repalaced caps today and still have the hum.now I will  try and figure out the ground problem.

anyone have any info on where this came from mail order,deptment store,combo with guitar,anything. I cant find any info . tubes 2@el84 2@12ax7 1@ez80

does  anyone have schematics or owners manual that i can have a copy of

Thanks. A ground problem was my first guess.I just got amp it still has a 2 prong plug  a ground plug is going to be one of my first fixes.Hard to find any info on this amp.any one have schematics?

I have a 1968 gretsch nashville soild state amp .When I use the built in  echo or the tremolo effect the amp will thump continuously without strumming a note.What is wrong.