reason for a high noise floor?

[sleewell]

rehearsal last night was fun. 6505 with a few pedals. sounded great. the only issue i was having was a high noise floor on the gain channel that I didn't remember from the last time i played it which i'll admit was a long time ago. seemed fine just going into the fx return with my helix. midway through i switched to my 5153 and was having the same issue. i dont think its the power there, we have shows there and it doesnt seem to be a problem with other people's amps.

could it be a bad cable? i went guitar > tuner > fortin mini zuul> keeley ts9dx > eqd afterneath > amp input. the noise gate didnt really seem to do anything to the noise floor but it did help with the squeals and bad feedback.

i guess i could start with no pedals and test every cable. i also looked at the zuul manual about having a splitter and using the key input, maybe ill try that. at the end of practice i took the gate and put it in the loop of the amp and even that didn't solve it.

whatchu think???

on a unrelated side note i also plugged my helix in like i had been running it into the fx return just to compare it. sounded really good lolololololol. its good to have options i guess, round and round hahaha.

 

[EOengineer]

I’d try rolling some 12ax7s given the age of the amp.

EDIT: oops, saw your other amp has the same issue. Has to be environmental. I’d start unplugging stuff one by one.

 

[DrewJD82]

And if nothing in your rig solves the buzz by unplugging parts of the rig, unplug everything from the outlets!

I have an LED lamp that will make shit buzz when it’s plugged in, regardless if it’s on or off.

 

[Boudoir Guitar]

rehearsal last night was fun. 6505 with a few pedals. sounded great. the only issue i was having was a high noise floor on the gain channel that I didn't remember from the last time i played it which i'll admit was a long time ago. seemed fine just going into the fx return with my helix. midway through i switched to my 5153 and was having the same issue. i dont think its the power there, we have shows there and it doesnt seem to be a problem with other people's amps.

could it be a bad cable? i went guitar > tuner > fortin mini zuul> keeley ts9dx > eqd afterneath > amp input. the noise gate didnt really seem to do anything to the noise floor but it did help with the squeals and bad feedback.

i guess i could start with no pedals and test every cable. i also looked at the zuul manual about having a splitter and using the key input, maybe ill try that. at the end of practice i took the gate and put it in the loop of the amp and even that didn't solve it.

whatchu think???

on a unrelated side note i also plugged my helix in like i had been running it into the fx return just to compare it. sounded really good lolololololol. its good to have options i guess, round and round hahaha.

If you haven't plugged into the gain channel of an amp in a while and you're having the same issue with two amps on the gain channel but not th clean channel and not when running a modeler into fx return, Imma go with "Amps always seem simpler, but they're not." You're noise gate is cutting out the guitar input, so you're not getting feedback/squeels, but in that arrangement is not doing a damn thing to (substantial) inherent preamp hiss that is going to be there regardless of whether your guitar signal is getting through the gate or not.

 

[Byrdman]

And if nothing in your rig solves the buzz by unplugging parts of the rig, unplug everything from the outlets!

I have an LED lamp that will make shit buzz when it’s plugged in, regardless if it’s on or off.

The house we are in, we did a complete remodel when we bought it. I replaced every candescent light in the house with LED's. Although great on electric bills, kinda sucks with tube amps, lol... I bought the house before I bought my tube amps Fortunately, some days are better than others on the buzzing.