Deluxe reverb build bad hum

What is the layout like ... can you post some pictures?
The hum increase when ypu get close to the top of the amplifier I would say is open circuit inputs or a badly wired grid connection.
I will have a better idea once I can view the internals.

 

Looks like there is no ground switch connection on this input jack ... or is there ...
Grid leak resistors? I can't see them on the first stage at all.

 

It’s definitely a ground issue... That’s a lot of AC hum. Verify your filter capacitors are connected correctly. Then verify your input and output jacks are isolated from ground when the ground shunts are open.

Also is this an unconnected wire poking it’s head out here?

 

Also where is the ground from your dog house going to?

 

A couple things, may not be related to all that much buzz though:
-Get rid of that big copper ground buss. Ground all the preamp stuff right near the jacks. Ground the power transformer and that stuff at the transformer or nearby.
-Check that the green wires to the pilot light are not grounding on the light somewhere. This is easy to do with solder that has run down etc.
-I assume the wire under the diode board is there that goes from the diode to the cap? Dont see it sticking out of the solder glob.
-With that constant buzz I wonder if all the wiring is correct to/under the cap can?
-Make sure the ground from the cap doghouse is near the PT.

 

On the output tubes, make sure pin 2 is wired to pin 2 and pin 7 to pin 7 of the second one. If those are swapped, you get hum. Also, increase the 25uf negative bias supply capacitor to 100uf.

Good luck!

 

Ground bus is connected to chassis two places so technically it forms a ground loop! Only very close the input jack is enough and then no operative current runs thru chassis! Steel input jack without insulation should be fine way to connect groung bus to chassis because there does not run any current thru it.

Only one other wire needs to be connected to chassis and it is mains cable earth!

All other parts of circuit should be insulated from chassis. If two to four steel input jacks are used perhaps they do not need insulation but for loudspeaker I recommend insulated.

Othervise that is most solid ground bus I have seen so far!!!