Old Premier reverberation unit

[drummer]

Hi there,
Have an old unit with original ungrounded plug, and it's hums loudly when turned on via the foot switch and it sounds like a fuzz pedal and there is no reverb at all.
Not even sure if it has the correct tubes in it. One is a 6aq5a/6hg5 and one is 6eu7, however there are pencil marks saying 6ak6 and PLBC.
I am a rookie so this will be my first project. To start how do I change the cord to grounded?
thanks

[drummer]

update...I wiggled the 6eu7 tube and it and it seems VERY suspect.
What is PLBC written on the chassis? How do I know someone put the wrong tubes in it?
thank you

[martin manning]

Step one. See if someone has been down the path before you:
https://noisemikers.com/premier-90-reve ... ponse-irs/

[drummer]

Step one. See if someone has been down the path before you:
https://noisemikers.com/premier-90-reve ... ponse-irs/

Thanks I just contacted them, sounds like it's over my head.

[martin manning]

But there is a schematic, and it shows how the 3-wire power cable is connected. That part is easy. The reworked grounding scheme isn't that difficult either, but you can put that off until after you replace the power cable and get it cleaned up and working as best it can as-is.

[drummer]

Yeah,
Thank you, I will revisit it. The cable "in" to the tank broke off at the source while I was poking around...ugh

[drummer]

Yeah,
Thank you, I will revisit it. The cable "in" to the tank broke off at the source while I was poking around...ugh