Page 1 of 2 12 LastLast
Results 1 to 35 of 38

Thread: New hum

  1. #1
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12

    New hum

    Hi all
    Not sure where to post this
    I have 3 rigs all using Korg AX3000g effects pedals
    Had them for about 10 years
    About 5 months ago, I started to get a lot of hum on all 3 rigs
    But......only with certain guitars!
    I have 16 guitars
    6 out of 16 hum loudly ( like bad single coils )
    All my guitars are humbuckers except 1
    I have tried everything I know, with no results
    I run all rigs thru a voltage regulated power supply
    Voltage is constant at 116.7
    Thanks for looking
    Clay

    0 Not allowed! Not allowed!

  2. #2
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    32,543
    Thumbs Up/Down
    Received: 2,066/7
    Given: 0/0
    Rep Power
    55
    Do the rigs all three do it with the same guitars? And do these rigs travel, and if so, does the hum happen everywhere or just certain locations?

    Noww, strap on a guitar that hums like this. STand there and listen to the hum. Now turn 90 degrees and face sideways, in other words aim the guitar to the side. Does the hum stay teh same or does it get stronger or weaker. We want to find if the guitar direction matters. It may be environmental.


    HAve we recently added light dimmers or something? ANy other electrical changes?

    2 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  3. #3
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    The hum gets louder when I turn 90 degrees
    Rigs stay in my basement
    No new electrical
    All rigs hum with same guitars
    Thanks
    clay

    0 Not allowed! Not allowed!

  4. #4
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    32,543
    Thumbs Up/Down
    Received: 2,066/7
    Given: 0/0
    Rep Power
    55
    Since your guitar aiming changes it, it means your guitars are picking it up from somewhere. Is there anything in the room above you that has recently changed or been added? Portable dehumidifier, room fan, computer gear?

    Aim the guitar one way, not walk closer and farther from your amplifier. Does distance matter? My guitar picks up fields from power transformers when I get within a few feet.

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  5. #5
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    Distance makes a difference
    Walking closer to the amp has almost no hum
    Hum seems to be coming from the left side of my basement
    No hum facing right
    Walking farther away doesn't change the hum
    Hum is only facing the left side of basemant
    Also, amount of seems to change from hour to hour and day to day
    Seems you're on the track

    0 Not allowed! Not allowed!

  6. #6
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    Click image for larger version. 

Name:	004.JPG 
Views:	60 
Size:	187.9 KB 
ID:	49708
    Click image for larger version. 

Name:	005.JPG 
Views:	58 
Size:	124.7 KB 
ID:	49709Click image for larger version. 

Name:	008.JPG 
Views:	63 
Size:	145.0 KB 
ID:	49710
    1st pic is str8 on to amp and cab
    2nd is left of amp
    3rd is left side of basement

    0 Not allowed! Not allowed!

  7. #7
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    32,543
    Thumbs Up/Down
    Received: 2,066/7
    Given: 0/0
    Rep Power
    55
    I grew up in Silver Spring, and I know the weather there. Does this possibly correlate to heat? On those really hot days, the power lines can sag and you get low mains voltage. ANy possibility?


    best I can suggest is to continue to use the guitar as a direction finder and nearness sensor. See if you can localize the source to a particular place, maybe near some power wiring in the walls?

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  8. #8
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    Funny, I grew up in rockville md!
    Heat doesn't seem to be an issue
    My buddy who is an electrician thinks it could be a new relay station
    I like the idea of using the guitar to track the hum
    Just don't know why the other guitars have little to no hum
    Thanks
    Clay

    0 Not allowed! Not allowed!

  9. #9
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    32,543
    Thumbs Up/Down
    Received: 2,066/7
    Given: 0/0
    Rep Power
    55
    What we do is track down the source of the problem. That tends to make clear the WHY of things. Some pickups may be more sensitive to area fields that others. Some guitars are better shielded inside. Who knows at this point?

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  10. #10
    Lifetime Member Enzo's Avatar
    Join Date
    May 2006
    Location
    Lansing, Michigan, USA
    Posts
    32,543
    Thumbs Up/Down
    Received: 2,066/7
    Given: 0/0
    Rep Power
    55
    My sister still lives in Gaithersburg, that is where the family gathers for Xmas.

    0 Not allowed! Not allowed!
    Education is what you're left with after you have forgotten what you have learned.

  11. #11
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    I hustled pool all over md dc va area. silver spring is a tough area now
    gaithersburg is a nice place.
    thanks for the help
    when my electrician gets back from vegas we'll look for the hum in the house
    thanks for all your help
    clay

    0 Not allowed! Not allowed!

  12. #12
    Supporting Member mozz's Avatar
    Join Date
    Oct 2015
    Location
    NEPA
    Posts
    840
    Thumbs Up/Down
    Received: 197/1
    Given: 138/0
    Rep Power
    5
    Old Heathkit amplifier i see there? What are you powering the pedals with? Have you plugged straight in and see if the hum is there?

    0 Not allowed! Not allowed!

  13. #13
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by Gunn_Slinger View Post
    Click image for larger version. 

Name:	004.JPG 
Views:	60 
Size:	187.9 KB 
ID:	49708
    Click image for larger version. 

Name:	005.JPG 
Views:	58 
Size:	124.7 KB 
ID:	49709Click image for larger version. 

Name:	008.JPG 
Views:	63 
Size:	145.0 KB 
ID:	49710
    1st pic is str8 on to amp and cab
    2nd is left of amp
    3rd is left side of basement
    On left side of the basement turn off that Flourescent light in the picture then play and also turning your guitar 90 degrees. Sometimes the light will start to put out some hash as they get older.. We used to have some of the exit sign that would interfere with the dvr camera systems if they were mounted to close. You could hear them hum if you put your head near them.. Only solution was to replace exit sign or move camera farther away.

    nosaj

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  14. #14
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    15,793
    Thumbs Up/Down
    Received: 2,656/4
    Given: 3,098/0
    Rep Power
    30
    The reason some of your guitars hum more/less than others is likely a combination of specific properties. Some guitars are shielded better than others. Some conductive paints are better than others. Some humbuckers have more symmetrical coils and will cancel hum better. The higher a pickups output the more it can transfer any noise it picks up. So...

    Let's say you have a guitar with less than great shielding and a high-ish output humbucker that has a small offset in the coil windings. At face value it looks to be appointed similar to another of your guitars. But that one may have more ideal shielding and somewhat lower output pickups with symmetrical coils. The former will hum more than the latter.

    0 Not allowed! Not allowed!
    "In fact when I run into problems working on electronic circuirts, there are so many times that when I finally track it down, the source of the problem is located between my soldering iron and my seat." SoulFetish

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

  15. #15
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by Chuck H View Post
    The reason some of your guitars hum more/less than others is likely a combination of specific properties. Some guitars are shielded better than others. Some conductive paints are better than others. Some humbuckers have more symmetrical coils and will cancel hum better. The higher a pickups output the more it can transfer any noise it picks up. So...

    Let's say you have a guitar with less than great shielding and a high-ish output humbucker that has a small offset in the coil windings. At face value it looks to be appointed similar to another of your guitars. But that one may have more ideal shielding and somewhat lower output pickups with symmetrical coils. The former will hum more than the latter.
    This is why I honed in on the pic with the flourecscnet light.
    nosaj

    I have 3 rigs all using Korg AX3000g effects pedals
    Had them for about 10 years
    About 5 months ago, I started to get a lot of hum on all 3 rigs
    But......only with certain guitars!

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  16. #16
    ToneOholic! big_teee's Avatar
    Join Date
    Jun 2010
    Location
    Mid-South USA
    Posts
    11,503
    Thumbs Up/Down
    Received: 917/32
    Given: 894/14
    Rep Power
    22
    You say some humbucker guitars are noisier than others.
    Curious which ones are the worst?
    If they are the LP type, how the 3 way switch is wired, can make them noisy.
    I've rewired a lot of LP imports to get rid of that noise.
    T

    0 Not allowed! Not allowed!


    "You can't promote principled anti-corruption action without pissing off corrupt people!" Diplomat George Kent
    Terry

  17. #17
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by big_teee View Post
    You say some humbucker guitars are noisier than others.
    Curious which ones are the worst?
    If they are the LP type, how the 3 way switch is wired, can make them noisy.
    I've rewired a lot of LP imports to get rid of that noise.
    T
    That wouldn't have changed in the last 5 months I wouldn't think, provided the guitars did not get worked on.
    nosaj

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  18. #18
    ToneOholic! big_teee's Avatar
    Join Date
    Jun 2010
    Location
    Mid-South USA
    Posts
    11,503
    Thumbs Up/Down
    Received: 917/32
    Given: 894/14
    Rep Power
    22
    Quote Originally Posted by nosaj View Post
    That wouldn't have changed in the last 5 months I wouldn't think, provided the guitars did not get worked on.
    nosaj
    He says some are louder than others.
    I was addressing that.

    0 Not allowed! Not allowed!


    "You can't promote principled anti-corruption action without pissing off corrupt people!" Diplomat George Kent
    Terry

  19. #19
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by big_teee View Post
    He says some are louder than others.
    I was addressing that.
    Makes sense.
    Anyone concur with the light being a good possibility?

    nosaj

    1 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  20. #20
    Member Emeritus Forever Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,506
    Thumbs Up/Down
    Received: 129/0
    Given: 77/0
    Rep Power
    18
    Quote Originally Posted by Chuck H View Post
    The reason some of your guitars hum more/less than others is likely a combination of specific properties. Some guitars are shielded better than others. Some conductive paints are better than others. Some humbuckers have more symmetrical coils and will cancel hum better. The higher a pickups output the more it can transfer any noise it picks up. So...

    Let's say you have a guitar with less than great shielding and a high-ish output humbucker that has a small offset in the coil windings. At face value it looks to be appointed similar to another of your guitars. But that one may have more ideal shielding and somewhat lower output pickups with symmetrical coils. The former will hum more than the latter.
    To expand upon your reply, there is 60hz hum which a humbucking pickup addresses. As you said some hbs do that better than others.
    And there is a higher pitched "hash" static-y noise that is addressed by shielding the control and pickup cavities in a guitar. Often called RFI it can be transmitted through house wiring. Some solutions work better than others with this non--hum noise.

    Conductive paint can work well but it usually requires several coats with several hours if not more between the coats. And once you open the can and let air in it might not still be usable a few years later...

    I prefer to use the copper foil tape that you can order from Stew Mac or Amazon with the conductive adhesive (very important!) You will have to remove the pots, etc., to do it right but there is no waiting time between coats. You will want to glue heavy duty aluminum foil on cavity covers and run a narrow strip of foil tape to one or more screw holes to insure a positive connection. I always solder the seams of adjacent strips just in case the adhesive lets go later and you need a good connection between the copper foil tape and the ground wiring in the guitar (either solder or a lug.) BTW that is also very important when using conductive paint — do not assume that the pots and bushings will be sufficient (the guitar mfgs never do.)

    FWIW the imported guitars these days are more likely to come from the factory with shielding (always conductive paint) because their assembly process can allow for proper drying and recoat times. Gibson guitars usually come with no shielding at all these days although the LP Standard I bought in 1976 $600 had a metal plate under the pots and a metal cover that went on top of it.

    Back to you, Chuck.

    Steve A.

    1 Not allowed! Not allowed!
    Last edited by Steve A.; 07-14-2018 at 11:53 PM.

  21. #21
    Member Emeritus Forever Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,506
    Thumbs Up/Down
    Received: 129/0
    Given: 77/0
    Rep Power
    18
    Quote Originally Posted by nosaj View Post
    Makes sense.
    Anyone concur with the light being a good possibility?

    nosaj
    Yes, but it can be switched off to test that as was suggested earlier, right? Did anyone already mention light dimmers? Also is this a single family home or are there multiple units in which a neighbor might be doing something differently? Is there perhaps an electric company transformer within X yards of the house? I live in a 4 unit condo with a utility transformer across the street so I must deal with all sorts of noise..

    Steve A.

    0 Not allowed! Not allowed!

  22. #22
    Senior Member SoulFetish's Avatar
    Join Date
    Jan 2016
    Location
    Massachusetts
    Posts
    1,293
    Thumbs Up/Down
    Received: 460/1
    Given: 398/0
    Rep Power
    7
    Quote Originally Posted by Enzo View Post
    What we do is track down the source of the problem. That tends to make clear the WHY of things.
    That’s a good one, Enzo. Thats an important part of succesful troubleshooting, And I don’t know if I’ve heard it said any better.

    0 Not allowed! Not allowed!
    If I have a 50% chance of guessing the right answer, I guess wrong 80% of the time.

  23. #23
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    15,793
    Thumbs Up/Down
    Received: 2,656/4
    Given: 3,098/0
    Rep Power
    30
    Quote Originally Posted by Steve A. View Post
    Back to you, Chuck.
    Thanks Steve! This just in...

    Good points on shielding and info on modern Gibson practices. I didn't know they weren't shielding all their guitars.

    The humbucker design works on any noise picked up by the coils at a frequency covered by the spacial relationship between the coils. So, pretty high above strictly 60Hz. I've used this to my advantage in designing "other" stuff too. And obviously anything in the HF like static and RF are just too tiny for the humbucker coils to effectively "see" the same thing on bioth coils. Ergo, no cancellation.

    You can buy brushable conductive paint that is water based. I know this because I painted a house with it once. Very expensive as house paint goes at something like $649.00 (retail) for a five gallon bucket. But you could paint A LOT of guitar cavities with five gallons. Probably about 649 This was a coating made specifically to block cell phone tower signals. This customer had recently had a cell tower go up in line of sight with their home and they were wearing tin foil hats and taking readings with an EMF meter when I arrived (they weren't really wearing tin foil). Anyway... I painted the house with the coating, which looked really boss actually since I'd never painted a house BLACK before, and then I painted it with a more pedestrian color scheme in regular house paint. Before I put the house paint on I couldn't resist punching my meter probes into the coating to see how conductive it was. Keep in mind that this was a water based binder. With a typical "rolled on" coat thickness and my arms spread as far apart as I could, the highest resistance reading I could get was 27 ohms. That's with almost six feet between the probes. I thought that was pretty damned good. After I grounded the film (with the supplied kit and according to instructions) The customers EMF meter was pretty much tanked at virtually no reading. Mission accomplished and my customers will be money ahead in about a hundred years because they didn't have to buy all that extra tin foil.

    I saved some of the coating to experiment with but I haven't had a project for it yet.

    0 Not allowed! Not allowed!
    "In fact when I run into problems working on electronic circuirts, there are so many times that when I finally track it down, the source of the problem is located between my soldering iron and my seat." SoulFetish

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

  24. #24
    Member Emeritus Forever Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,506
    Thumbs Up/Down
    Received: 129/0
    Given: 77/0
    Rep Power
    18
    Quote Originally Posted by Chuck H View Post
    Thanks Steve! This just in...

    Good points on shielding and info on modern Gibson practices. I didn't know they weren't shielding all their guitars.

    The humbucker design works on any noise picked up by the coils at a frequency covered by the spacial relationship between the coils. So, pretty high above strictly 60Hz...

    You can buy brushable conductive paint that is water based. I know this because I painted a house with it once. Very expensive as house paint goes at something like $649.00 (retail) for a five gallon bucket...

    Before I put the house paint on I couldn't resist punching my meter probes into the coating to see how conductive it was. Keep in mind that this was a water based binder. With a typical "rolled on" coat thickness and my arms spread as far apart as I could, the highest resistance reading I could get was 27 ohms. That's with almost six feet between the probes. I thought that was pretty damned good....

    I saved some of the coating to experiment with but I haven't had a project for it yet.
    I keep a can of the water-based StewMac conductive paint around and use it where the copper foil tape might be overkill. I ohm it out with test probes and it seems to work best with 3 properly timed coats. One concern (possibly unfounded) is that a thin single layer might flake off and get inside the pots. Especially if the paint in the can had dried out a bit after a few years. With one guitar I put a clear coat of something over the conductive paint just to be sure.

    Here's a real life horror story... In the early 80's I rewired my 1976 LP with Schector P-P OmniPots using the drawing in the Brosnac book for the Jimmy Page wiring scheme. I had to remove the metal base plate and cut into the wood a bit for the neck volume pot so I used an MEK-based conductive paint from Stars Guitars in SF to shield the control cavity. "Be sure to mask off the holes for the pots to protect the finish."

    I had no masking tape around so I figured that Scotch Magic Invisible tape should work just as well, right? Everything looked fine until I removed the tape and found the nitro finish mottled around all 4 pot holes... Argh!

    Steve A.

    P.S. I mentioned soldering the seams between the strips of copper foil tape... I usually get out my 60-40 plumbing solder and coat the entire foil surface with it. "To keep Superman from using his xray vision to reverse-engineer my custom wiring harness!" if anybody asked. (Before I learned about StewMac I'd buy the 410" sheets of copper foil tape from GC at the local electronics parts house which did not use a conductive adhesive so you had to run a solder bead between adjacent sheets.)

    1 Not allowed! Not allowed!
    Last edited by Steve A.; 07-15-2018 at 01:34 AM.

  25. #25
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    15,793
    Thumbs Up/Down
    Received: 2,656/4
    Given: 3,098/0
    Rep Power
    30
    Quote Originally Posted by Steve A. View Post
    To keep Superman from using his xray vision to reverse-engineer my custom wiring harness!
    Hardy LOL

    That thieving sell out is working for The Man. You know it.

    0 Not allowed! Not allowed!
    "In fact when I run into problems working on electronic circuirts, there are so many times that when I finally track it down, the source of the problem is located between my soldering iron and my seat." SoulFetish

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

  26. #26
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by Steve A. View Post
    I keep a can of the water-based StewMac conductive paint around and use it where the copper foil tape might be overkill. I ohm it out with test probes and it seems to work best with 3 properly timed coats. One concern (possibly unfounded) is that a thin single layer might flake off and get inside the pots. Especially if the paint in the can had dried out a bit after a few years. With one guitar I put a clear coat of something over the conductive paint just to be sure.

    Here's a real life horror story... In the early 80's I rewired my 1976 LP with Schector P-P OmniPots using the drawing in the Brosnac book for the Jimmy Page wiring scheme. I had to remove the metal base plate and cut into the wood a bit for the neck volume pot so I used an MEK-based conductive paint from Stars Guitars in SF to shield the control cavity. "Be sure to mask off the holes for the pots to protect the finish."

    I had no masking tape around so I figured that Scotch Magic Invisible tape should work just as well, right? Everything looked fine until I removed the tape and found the nitro finish mottled around all 4 pot holes... Argh!

    Steve A.

    P.S. I mentioned soldering the seams between the strips of copper foil tape... I usually get out my 60-40 plumbing solder and coat the entire foil surface with it. "To keep Superman from using his xray vision to reverse-engineer my custom wiring harness!" if anybody asked. (Before I learned about StewMac I'd buy the 410" sheets of copper foil tape from GC at the local electronics parts house which did not use a conductive adhesive so you had to run a solder bead between adjacent sheets.)
    Stain Glass shops sell it reasonably also.

    nosaj

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  27. #27
    Bent Member Chuck H's Avatar
    Join Date
    May 2007
    Location
    pacific north west
    Posts
    15,793
    Thumbs Up/Down
    Received: 2,656/4
    Given: 3,098/0
    Rep Power
    30
    Quote Originally Posted by nosaj View Post
    Stain Glass shops sell it reasonably also.

    nosaj
    Oh, you're going back to the brick and mortar era (don't we all wish) I use to buy the stuff at stained glass shops when they still existed. In that case you can't be sure of the conductivity of the adhesive so you need to be sure and put a solder blob at any seam.

    0 Not allowed! Not allowed!
    "In fact when I run into problems working on electronic circuirts, there are so many times that when I finally track it down, the source of the problem is located between my soldering iron and my seat." SoulFetish

    "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

    "Being born on third base and thinking that you must have hit a triple is pure delusion!" Steve A

  28. #28
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by Chuck H View Post
    Oh, you're going back to the brick and mortar era (don't we all wish) I use to buy the stuff at stained glass shops when they still existed. In that case you can't be sure of the conductivity of the adhesive so you need to be sure and put a solder blob at any seam.
    Well when you live on an Island....
    We have some here in Pensacola. Gotta have something for the retired folks to do around here.

    nosaj

    1 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  29. #29
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    Good eye. i built the heathkit guitar amp the 1st year it came out,1960.
    Str8 into clean side of amp has little hum. Overdrive side has LOTS!
    The AX3000g has a noise suppressor built in.
    All was fine until about 5 months ago.
    No changes to guitars or rigs, just started to have hum issues on all rigs
    with certain rigs. I changed the 3 way switch on my les paul ( duncan sh1 59's ).
    No change
    Strange that 2 of my hi-output guitars have little to no hum
    Strat made by my tech ( sharpen-your-axxe ) EVH with steve vai evolution pickup
    and my Eastwood Ovation Ultra GP ( 14k pickups ).
    Enzo's use of the humming guitar to follow to the source is what I will do
    when my electrician gets here to help me
    Thanks all
    Clay

    0 Not allowed! Not allowed!

  30. #30
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by Gunn_Slinger View Post
    Good eye. i built the heathkit guitar amp the 1st year it came out,1960.
    Str8 into clean side of amp has little hum. Overdrive side has LOTS!
    The AX3000g has a noise suppressor built in.
    All was fine until about 5 months ago.
    No changes to guitars or rigs, just started to have hum issues on all rigs
    with certain rigs. I changed the 3 way switch on my les paul ( duncan sh1 59's ).
    No change
    Strange that 2 of my hi-output guitars have little to no hum
    Strat made by my tech ( sharpen-your-axxe ) EVH with steve vai evolution pickup
    and my Eastwood Ovation Ultra GP ( 14k pickups ).
    Enzo's use of the humming guitar to follow to the source is what I will do
    when my electrician gets here to help me
    Thanks all
    Clay
    Setup to play and then turn off that flourescent light, does the hum go away?

    nosaj

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  31. #31
    Member Gunn_Slinger's Avatar
    Join Date
    Aug 2008
    Location
    northern virginia
    Posts
    73
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    12
    No. They have been in basement for 23 years
    My electrician checked to make sure they didn't hold a charge
    His 'guess' was a new relay sub-station close to me
    The house is on 1/2 acre lot built in 1961
    The whole music room is powered by 2 voltage regulated power supplies that
    hold steady at 116.7 volts
    Its starting to consume my life! Lol
    thanks for the input
    Clay

    0 Not allowed! Not allowed!

  32. #32
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    Quote Originally Posted by Gunn_Slinger View Post
    No. They have been in basement for 23 years
    My electrician checked to make sure they didn't hold a charge
    His 'guess' was a new relay sub-station close to me
    The house is on 1/2 acre lot built in 1961
    The whole music room is powered by 2 voltage regulated power supplies that
    hold steady at 116.7 volts
    Its starting to consume my life! Lol
    thanks for the input
    Clay
    You can always use a detuned AM battery AM radio to track the hum as you walk the house. As far as help for this issue you'd be better off with a ham than an electrician.
    Electricians don't always quite understand radio waves which is what your dealing with.
    It could even be something as simple as a twistlock connection having some corrosion on it creating some RF hash.

    He was there we were not so we have to do the guessing .

    Did find this article on substation hum https://hebel.com.au/resolving-noise...f-substations/

    Here's an article from the ARRL on getting it fixed by you, or the electric company and the FCC rules. Including on how to use the AM radio as a locator. This will help you in getting to the crux of the situation
    http://www.arrl.org/power-line-noise

    nosaj

    nosaj

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  33. #33
    Member Emeritus Forever Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,506
    Thumbs Up/Down
    Received: 129/0
    Given: 77/0
    Rep Power
    18
    Quote Originally Posted by Gunn_Slinger View Post
    His 'guess' was a new relay sub-station close to me
    How close and how new? With a battery powered headphone amp that plugs into your noisiest guitar you could walk around and follow wherever it gets louder. Joyo has one for $20 but I'd go with a $40 Vox Amplug if I was planning to use it musically...

    The whole music room is powered by 2 voltage regulated power supplies that hold steady at 116.7 volts
    Is that something installed by an electrician or something that plugs into the existing wiring?

    Have you tried turning off all of your breakers except for your music room? And then turn the breaker off for the room and plug your amp into an extension cord connected to various outlets throughout your house as you turn the appropriate breaker on for that test...

    Steve A.

    P.S. A guitarist friend just got one of those fairly new/very small USB-powered wireless systems that sells for $150. He said it makes his guitars with single coil pickups less noisy. I had been wondering if the guitar would be noisier because there would be no direct connection to earth ground...

    0 Not allowed! Not allowed!

  34. #34
    Master Destroyer nosaj's Avatar
    Join Date
    Sep 2011
    Location
    Pace, FL
    Posts
    3,312
    Thumbs Up/Down
    Received: 1,164/102
    Given: 161/36
    Rep Power
    12
    All steps should be performed while interference is active!

    Go to the main breaker panel or fuse box in the home. Verify the presence of the noise with the battery-powered radio. (Be sure to have your flashlight ready in case the lights go out.)
    If the noise is present and is the same as the interference, shut off all power to the premises by turning off the MAIN circuit breaker or pulling the MAIN fuses. An alternate method is to place the radio next to the meter and, if the noise is present, pull the meter. If the noise on the AM radio stops while the power is off, the source of the interference is within the residence. If the noise continues, you can assume it is coming from a point external to the customer's home.
    Restore the main circuit breaker or fuses or meter.
    If the noise stopped while the power was off, you can locate the circuit supplying the power to the noise source. While monitoring the battery powered AM radio as before, and with the noise present, turn off and on the individual circuit breakers one at a time until the noise stops. Leave off the breaker that stops the noise.
    You must now determine what is on the circuit by going from room to room, if necessary, checking outlets, appliances, and lights for the absence of electricity. The offending noise will be something on this circuit. Turn the breaker back on and wait for the noise to return.
    With the noise back on and using the AM radio to monitor it, return to the area of the noisy circuit and unplug everything on this circuit one at a time until the offending device is found.
    Here are some household items commonly found to cause interference:

    Door Bell Transformers
    Electric Blankets
    Electric Blankets
    Heating Pads (of all kinds)
    Recessed Ceiling Light Fixtures
    Furnace Control Circuits
    Refrigerators (Becoming a frequent problem)
    TV Top & Stereo, Amplified Antennas
    Light Dimmers
    Aquarium Heaters
    Screw In Photocells
    Low Energy Compact (screw in) Florescent Lights
    Touch Control Lamps
    Clean Air Machines (table top and furnace type)
    These devices, when causing harmful interference, are in violation of Federal Communications Commission rules and regulations and can be a nuisance to the customer and their neighbors. It is important to have the offending device repaired or replaced to ensure normal safe operation. Many sources of radio and television interference are also caused by arcing. The arcing will generate heat and may signal a fire hazard.

    0 Not allowed! Not allowed!
    Binkie McFartnuggets‏:If we really wanted to know the meaning of life we would have fed Stephen Hawking shrooms a long time ago.

  35. #35
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    13,012
    Thumbs Up/Down
    Received: 571/3
    Given: 300/0
    Rep Power
    28
    It sure would help to know the frequency of the hum.

    Got an o'scope?

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Hum at Zero volume - decreases at mid-point, then more hum...
    By Mandopicker in forum Maintenance, Troubleshooting & Repair
    Replies: 9
    Last Post: 05-10-2016, 06:45 AM
  2. Fender Twin Hum Hum Hum
    By teepeeasel in forum Maintenance, Troubleshooting & Repair
    Replies: 7
    Last Post: 01-06-2010, 06:00 PM
  3. Mesa Lonestar hum(generally about hum)
    By Stretto in forum Maintenance, Troubleshooting & Repair
    Replies: 7
    Last Post: 08-22-2009, 09:18 PM
  4. Musicman trouble shooting has caused hum, and only hum.
    By Gaz in forum Maintenance, Troubleshooting & Repair
    Replies: 16
    Last Post: 03-10-2009, 01:53 AM
  5. SE el84 triode wired=hum as pentode=no hum ?
    By walkman in forum Maintenance, Troubleshooting & Repair
    Replies: 5
    Last Post: 02-24-2008, 03:54 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •