It was the cable going to and from the reverb tank. After swapping tubes and having the hum problem, I began tapping and found that tapping and moving the reverb tank resulted in the hum/no hum. I found the 4 tab connector loose. I went to Radio Shack and bought a better connector.
So, when you get the reverb tank you can check that as well. My tank sounds even better now than it did before.
You found your issue but this is a common issue for another reason .... A lot of folks think this is tubes since it comes and goes but in most cases it is the ground on your wall and noise comes and goes on the common ground.
Try a ground lift .... one of those two prong adaptors on the reverb unit .... I bet you find the problem goes away.
perro rabioso: Jack n Jill went up the hill, each had a buck and a quarter. Jill came down with two and a half; do you think she went up there for water?
Nov 23, 2014 4:56:21 GMT -7
doctorice: riddle x rhetorical question --> riddicule (sic)
Nov 23, 2014 15:23:40 GMT -7
Poodleman: Less presents, more presence.
Nov 25, 2014 10:18:11 GMT -7
BritInvasion: Suffering from pie withdrawal...
Nov 28, 2014 11:19:48 GMT -7
Joel B: Wine spo-dee-o-deee ....
Nov 29, 2014 8:16:47 GMT -7
Joel B: Keg chiller .....
Nov 30, 2014 10:22:32 GMT -7
Rich (fbb90): 'shine don't need no chillin'....
Dec 1, 2014 7:39:22 GMT -7
"Z" Steve: The Far Side
Dec 2, 2014 22:27:10 GMT -7
Joel B: Shine on you crazy diamond .....
Dec 5, 2014 14:48:14 GMT -7
BritInvasion: I hate doing plumbing repairs. That is all.
Dec 8, 2014 11:18:04 GMT -7
Eddie: No way, Frank! I am going outside at this very moment to fix a leaky outdoor faucet. Must be going around…
Dec 8, 2014 12:30:14 GMT -7
djcakadave: Frank, plumbing is easy, stuff runs downhill, payday is on Friday, and don't lick your fingers
Dec 8, 2014 16:00:16 GMT -7
perro rabioso: "I hate doing plumbing repairs. That is all." Meee Tooo, Frank. But it's better than paying some clown 100 bucks to drive to yer house and 200 to fix a rotten pipe.....[br][br][br]
Dec 9, 2014 5:45:34 GMT -7
gotmojo: My wife has, once again, plugged up a toilet. It awaits my fix, even as we rant.
Dec 9, 2014 14:28:58 GMT -7
simpleton: ^That's just plumb crazy
Dec 10, 2014 1:55:38 GMT -7
Poodleman: I don't know if that poodle was licensed but he was one heck of a plumber.
Dec 10, 2014 19:52:56 GMT -7
perro rabioso: ^^^^"He wasn't much of a truck driver tho, he just ran over seventeen motorcycles!"
Dec 10, 2014 22:16:41 GMT -7
BritInvasion: Update : re : Toilet- I came , I saw , I conquered. But it was a helluva battle....
Dec 15, 2014 10:54:37 GMT -7
doctorice: So what you're saying, Frank, is Veni Vidi WeeWee
Dec 15, 2014 17:27:52 GMT -7