| Author |
Topic: EH Hum Debugger-tests |
Clyde Mattocks
From:
Kinston, North Carolina, USA
|
Posted 19 Dec 2007 12:46 pm |
|
I am intrigued by the comments on this device, since I have not found anything yet to satisfactorily tame
single coil hum. Their literature says it's not a
noise gate nor an EQ. Any of you guys with one of
these and a NV112, try this for me: Turn the master
almost wide open and the pre gain to about 1 o'clock
With nothing plugged in the amp, there will be an appreciable hum. Then input the Hum Debugger into
the input without the instrument plugged in and tell me if has any effect on the amp's hum at idle.
Then plug in the steel(single coil) and without playing, floorboard the volume pedal and tell me how much difference it makes with or without the Hum
Debugger.
I am interested in anything that appeases studio engineers and I would sacrifice a small amount of tonal quality to avoid permanently installing hum
bucking pickups in my Emmons. |
|
|
|
Al Risbeck
From:
Iowa, USA
|
Posted 21 Dec 2007 1:38 pm NV112
|
|
I don't have a NV112, but I have tried what you describe with both of my NV400s and NO HUM !!! with a Legrande II or a Push/Pull Emmons with the original single coil pup.
Hope you get your answer.
Al |
|
|
|
Tony Prior
From:
Charlotte NC
|
Posted 22 Dec 2007 2:09 am
|
|
Al, where was this done ? Home, Studio, gig..??
What was the hum like BEFORE the plug -in..?
tp |
|
|
|
Al Risbeck
From:
Iowa, USA
|
Posted 22 Dec 2007 6:27 am NV400 Test
|
|
Hi Tony
I did it in my practice area where I have overhead florecent lighting, the hum has always been bad here and depending on the gig sometimes better, other times really bad. Both amps did it with either steel, now it is gone with a brighter tone that I adjust my lows and mids to compensate for.
Al |
|
|
|
Lee Baucum
From:
McAllen, Texas (Extreme South) The Final Frontier
|
Posted 22 Dec 2007 8:57 am
|
|
| If, indeed, this product does away with single-coil hum, EH needs to take the Holy Grail name off their reverb unit and use it on this one! |
|
|
|
Bill Miller
From:
Gaspe, Quebec, Canada
|
Posted 22 Dec 2007 9:42 am
|
|
| It gets mixed user reviews on the Harmony Central site but overall I get the impression that it isn't something you'd want if you're particular about your tone. |
|
|
|
Clyde Mattocks
From:
Kinston, North Carolina, USA
|
Posted 23 Dec 2007 6:15 pm
|
|
Thanks you guys for taking time to respond. This
helps! |
|
|
|
Al Risbeck
From:
Iowa, USA
|
Posted 24 Dec 2007 6:32 am E H
|
|
| With the "bee hive" effect gone and the signal to the amp clear and if you adjust your amp you'll be much happier with sound, so will the rest of the band. |
|
|
|
Clyde Mattocks
From:
Kinston, North Carolina, USA
|
Posted 25 Dec 2007 7:28 pm
|
|
For further input from owners, go to guitarcenter.com
and read reviews. It's getting mixed reviews, but I
may have to buy one and see if it's worth it for a stopgap solution. |
|
|
|
richard burton
From:
Britain
|
Posted 29 Dec 2007 6:20 am
|
|
| Does it remove the 60 hz frequencies (and multiples)? |
|
|
|
Jon Light (deceased)
From:
Saugerties, NY
|
Posted 7 Mar 2008 3:54 pm
|
|
I'm wondering about follow-ups on this. Anybody? I can't get happy with my ShoBud's hum---it is a Pro 1 12-string with too small a cutout for a Lawrence humbucker so without doing some milling, this is not an option.
I'm thinking of getting one of these from GC to try (with the 45 day return policy).
I must say that I am skeptical. |
|
|
|
jay thompson
From:
east peoria, il USA
|
Posted 7 Mar 2008 4:53 pm Electro-Harmonix Hum De-Bugger
|
|
| I purchased one of these in December, just after Dyke Corson's post regarding this unit. It does every thing Dyke said it did. I did not notice tone change using Wallace Truetones. A great addition to my gear. Regards, Jay Thompson |
|
|
|
Jon Light (deceased)
From:
Saugerties, NY
|
Posted 7 Mar 2008 5:02 pm
|
|
| Wow---I'm thrilled to hear this. As crazy as we all can get about tone, for a steeler to say this means a lot. Great. |
|
|
|
Alan Kirk
From:
Scotia, CA, USA
|
Posted 7 Mar 2008 6:53 pm
|
|
I have one. I love it. Use it with guitar, bass or steel. Yes, it does change the sound a little bit, but that change is tolerable to get rid of the hum.
_________________
Everyone in the world has two jobs: 1) whatever they do for a living; and 2) music critic. |
|
|
|
Donny Hinson
From:
Glen Burnie, Md. U.S.A.
|
Posted 8 Mar 2008 11:07 am
|
|
Probably just a notch filter, with frequencies cut sharply at 60 and 120 cycles. I've always wondered why every amp maker doesn't include one, since it could be done for about $5.  |
|
|
|
Lee Baucum
From:
McAllen, Texas (Extreme South) The Final Frontier
|
Posted 8 Mar 2008 12:53 pm
|
|
Hmm. Donny - If, indeed, that's all it is, someone needs to start installing that inexpensive device in a little box. Then steel players can have one more thing to clamp to the legs of their guitars, next to the matchbox, tuner, and pick/bar/beverage holder.  |
|
|
|
Mark Deffenbaugh
From:
NYC
|
Posted 8 Mar 2008 1:47 pm
|
|
I tried one of these things - in fact, I tried two, figuring the first one must have been defective. Either it wasn't - or they both were.
Good news is that it is great for getting rid of single coil hum. Definitely not a notch filter. With notches at 60, 120 and 180 Hz you can get rid of about half of the problem, but there's usually a lot of high frequency garbage left over - and the Debugger pretty much gets it all.
Bad news is that it sounds like you are running through a tight, fixed flange. Interesting sound for some uses; but nothing at all like pure single coil tone. (I also noticed that it had a tendency to glitch on really fast notes - makes me think that it is actually doing some sort of reconstruction of the input signal...)
Holy grail - I wish. |
|
|
|
Jon Light (deceased)
From:
Saugerties, NY
|
Posted 13 Mar 2008 2:56 pm
|
|
Well----I must say....this thing most seriously works. It eliminates single coil hum. I'd say pretty much 100%. The affect on tone.....not severe. It sort of rearranges some overtones and makes some things a bit more bright, some things a bit less. As Mark says, the change is fixed as opposed to moving or sweeping so it's not like you turned on a flanger or phaser or anything.
I'm not a hardcore tone freak and I'm no purist. Therefore I do believe that I can live with what I'm hearing. The pedal is true bypass so you can really A/B it and the hum removal is super dramatic and the tone alteration is not.
This is no argument with anyone who can't abide the result but I'm going to keep it. Especially since a humbucker is not an option in this Sho-Bud without milling the cutout. My compliments to EH on this one. |
|
|
|
James Harrison
From:
New Brockton, Alabama, USA
|
Posted 13 Mar 2008 9:56 pm
|
|
To Donny or anyone who has this unit. If it can be built for $5.00, send me a schematic and I will build one and give you a true report.
Many years ago we built our own boxes and now I cannot find any schematics for building anything for musicians. It seems now everyone would rather pay $100.00 for a box that they can build for $10.00.
I still have the little Fuzz box I built in 1961. I tried it last week and it still works.
James |
|
|
|
Earnest Bovine
From:
Los Angeles CA USA
|
Posted 13 Mar 2008 10:18 pm
|
|
| James Harrison wrote: |
| If it can be built for $5.00, send me a schematic and I will build one |
How much should you send to the inventor? |
|
|
|
Earnest Bovine
From:
Los Angeles CA USA
|
Posted 13 Mar 2008 10:19 pm
|
|
| Jon Light wrote: |
| ..this thing most seriously works. It eliminates single coil hum. I'd say pretty much 100%. The affect on tone.....not severe. |
How DO it work?? |
|
|
|
Dave Mudgett
From:
Central Pennsylvania and Gallatin, Tennessee
|
Posted 13 Mar 2008 10:50 pm
|
|
A digital or analog notch filter doesn't need an "inventor". Just whip out MATLAB with the signal processing toolbox, and tell it what frequency bands you want to cut, how much you want them cut, which frequency interpolation method you want to use, and how many poles and zeroes you're willing to realize in your filter. Especially for a digital filter, this is pretty cut and dried anymore - one can sprinkle filter poles and zeroes on the complex z-plane as if shaking salt and pepper.
No doubt there are canned public circuits for the more popular frequencies.
But this doesn't sound like a notch filter if it cuts noise all over the audible spectrum. I have no idea what it is. |
|
|
|
rodger_mcbride
From:
Minnesota
|
Posted 14 Mar 2008 6:00 am Hum DeBugger
|
|
It says in the directions that it affects the harmonics of the hum, a switch on the unit allows the selection of just the odd or both the odd & even harmonics.
Given the alternative of occasional unbearable hum, it works really well and the tone quality change is manageable. I actually find it kind of pleasing, a sort of subtle early Nashville twang kind of thing, that can be mostly dialed out with the tone controls on the amp.
rodger |
|
|
|
Al Risbeck
From:
Iowa, USA
|
Posted 14 Mar 2008 6:08 am They love it
|
|
I got mine from Dyke Corson in December and everyone I've played with since says the tone is brighter and that they like it better, I'm using it on both a Legrande II and a push pull. I suspect that the ones it doesn't help have something else wrong with their guitar or pup.
_________________
Mullen Discovery, GK mb200 with Eminence EPS-15C, Fender steel King with Eminence EPS-15C,Nashville 400 amp, with EPS-15C,Evans FET500 with Peavey 1501 BW Goodrich L10K V.P.(2),Goodrich L120, Bose L1 PA with ToneMatch 4 Mic control board |
|
|
|
Earnest Bovine
From:
Los Angeles CA USA
|
Posted 14 Mar 2008 7:55 am
|
|
Of course most if not all of the hum you hear is harmonics of 60 Hz, not the 60 Hz fundamental.
A device that delays the signal by (1/120) second, and mixes that delayed signal with the source, at the same amplitude but opposite polarity, will exactly cancel any signal whose period is (1/60) second. This includes harmonics of (1/120) second, because the harmonics also repeat every (1/120) second. Draw a picture and you can see it.
You could selectively cancel some of the harmonics by using a shorter delay time such as (1/180) second.
So maybe that's how the box works. |
|
|
|
