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Dirty signal from a groovetube brick di

Bad hum and hiss when I plug in any 1/4 cable to the di. Tried the ground lift. Doesn't do anything.

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Hum tried filters di box with ground lift


Check the connections to the cartridge. If you cannot locate an exterior source of the hum, it could be a fault in the power supply of the turntable, perhaps an Electrolytic Capacitor?

Dec 30, 2013 | Stanton STR8-30 Turntable

1 Answer

Hum when mixer is turned on


If it is a 60Hz or 120 hz hum, the fault may be a bad solder connection to a filter capacitor in the power supply.

If it is a hum like a bad mic connection, you may have dirty contacts on an input, dirty tracks on a mixer control, even on the EQ portion.

It may also be a bad cable is connected, or a 1/4 inch jacked input may not be grounding out when the plug is removed. You may have a bad ground on the power feed and you have a ground loop as a result, or a cable is faulty and creating it's pwn ground loop to something else.

Contact cleaner is not a bad idea, slide pots are notorious for spurious noise over time. LPS1 is not bad, but it does use silicone as the dry lubricant portion.

If all of that is ruled out, look internally for bad solder joints- anything that looks crumbly is suspect, and also check for loose wires and jacks with bad solder connections. Also look for loose connectors too.

Mar 29, 2012 | Mackie 3204VLZ3 32-Channel USB Mixer

1 Answer

My AV receiver turns off a couple of seconds after I turn it on. I did what the manual said, unplugged the power source and removed all of the speakers but it continues to do the same thing. Anything else...


Hi,
you may have a bad Earth power 110 V AC cable connection which makes such hum / buzz even nothing connected..
Check the connections between components and make sure they are secure before proceeding to the next Step. Sometimes, loose connections can cause a hum.
  • Separate the audio cables from the power cables; electromagnetic interference from the power cables can cause stereo hum. Use cable ties to secure the audio cables away from the power cables.
  • Plug in a surge protector to the outlet, and then plug all the components into that surge protector
  • Connect a ground plug to the surge protector and then plug the ground plug into the main outlet. A ground plug is available at any hardware store, and turns a three prong connection into a two prong. Ground plugs help eliminate 60 cycle hum.
  • 5 Connect the ground wire from your turntable to the ground wire connection on the receiver. If this doesn't work, looking on the back there should be a grounding point,

    Unplug your receiver.. Split a wire and attach one of the splits to the receiver where you will see the text, "ground" or something similar. Attach the other end to something metal such as a pipe that goes into the ground. Secure with electrical tape. Plug in.
    connect the ground wire to a screw on the electrical outlet.

    Read more: How to Fix a Hum on a Stereo Receiver ' eHow.com http://www.ehow.com/how_5183193_fix-hum-stereo-receiver.html#ixzz1PpFHs1Mv

    Take care and please remember to rate me"AS THUMBS UP" Thanks
  • Jun 20, 2011 | Onkyo TX-SR606 Receiver

    1 Answer

    I have an older model Harman Kardon AVR and have started hearing humming from the speakers that are attached to it. Is my receiver going bad or is there something else I need to do to fix this problem?


    Hi,
    you may have a bad Earth power 110 V AC cable connection which makes such hum / buzz even nothing connected..
    Check the connections between components and make sure they are secure before proceeding to the next Step. Sometimes, loose connections can cause a hum.
  • Separate the audio cables from the power cables; electromagnetic interference from the power cables can cause stereo hum. Use cable ties to secure the audio cables away from the power cables.
  • Plug in a surge protector to the outlet, and then plug all the components into that surge protector
  • Connect a ground plug to the surge protector and then plug the ground plug into the main outlet. A ground plug is available at any hardware store, and turns a three prong connection into a two prong. Ground plugs help eliminate 60 cycle hum.
  • 5 Connect the ground wire from your turntable to the ground wire connection on the receiver. If this doesn't work, looking on the back there should be a grounding point,

    Unplug your receiver.. Split a wire and attach one of the splits to the receiver where you will see the text, "ground" or something similar. Attach the other end to something metal such as a pipe that goes into the ground. Secure with electrical tape. Plug in.
    connect the ground wire to a screw on the electrical outlet.

    Read more: How to Fix a Hum on a Stereo Receiver ' eHow.com http://www.ehow.com/how_5183193_fix-hum-stereo-receiver.html#ixzz1PpFHs1Mv


    Take care and please remember to rate "AS THUMBS UP" Thanks
  • Jun 20, 2011 | Harman Kardon AVR 85

    1 Answer

    Have a low noise like hum when i turn on thump 15A It doesn t change by moving level but when I plug in anything it s feeding a noisy tale on every signal attack.


    Make sure you are using BALANCED audio line to the speaker AND your mixer is powered from the SAME receptacle as this speaker. One MAY have to run an extension cord back to the mixer and othe equipment, but this must be done to reduce noise and also for equipment safety. Multiple recepatacles in a building have grounding issues that can generate noise or worse damage equipment due to ground loops. If you DJ mixer does NOT have balanced outputs, use DI boxes so you can use balanced lines to your speakers. Your cables will either be XLR or 1/4 inch TRS types, not just TS type.

    May 14, 2011 | Mackie TH-15A Active DJ Powered THUMP...

    1 Answer

    Hi, there is a hissing sound coming from my turntables, is it the RCA cable that connects to my mixer which is damaged? i tried to desolder it to change the cable but the small copper plate under the...


    I've used an 'RF isolator' or 'ground loop isolator' to remove hiss
    Its essentially a $20 1:1 transformer (ie no transforming) with RCA ins and outs.
    I got mine from Radio Shack (now called the source i guess).

    Takes out all kinds of hums and hisses.

    I hope that helps.

    Mar 13, 2011 | Technics SL-1200MK5 Turntable

    1 Answer

    Speaker humming....what is the course?


    How to Eliminate the Hum and Buzz from your Sound System

    Is your sound system making noises you don't want to hear? Try these tips to clear it up!

    Instructions


    Hum is usually the result of using electrical outlets with different grounds. To verify this, run an extension cord from the outlet that the amplifiers are plugged in, to the mixer.

    Remove all the DI boxes and adapters. Connect the mixer to the amplifiers with balanced cables.

    Be sure that all your cables and connectors are correctly wired:

    Pin 1 shield
    Pin 2 + white/red
    Pin 3 - black

    Note: If the system has an electronic crossover, equalizer, or limiter....you need to keep them in the signal chain to protect the system from damage. Just make sure all the cables are balanced and the pin-out on the connectors is correct.

    If your gear doesn't have balanced connections use good shielded cables with the proper connectors.... NO ADAPTORS!!!


    If the system still has noise, check each channel on the mixer by removing the input connections. There may be a DI box on stage that is also interacting and causing a ground loop. If that is the case try a different DI and make sure that all the instruments and amps on stage are also on the same dedicated ground as the mixer and amplifiers.


    If the hum is gone using the extension cord you will need the have your electrician run a dedicated ground to the mixer and amplifier electrical plugs.

    Simple Static Eliminationarcalian.com
    Is static causing problems in your reel-to-reel (web) process?



    Tips & Warnings

    *
    Removing the DI boxes, hum eliminators and bad cables may improve the sound quality...unless the DI boxes use very expensive line level transformers (Good ones are about $75 for just the raw transformer inside the box) the signal is being squished thru a $5 instrument level DI box.
    *
    DO NOT lift the grounds on any of the AC inputs to the amps or the mixer as this could result in electrocution. OUCH!


    Hope it helped..

    Please don't forget to rate me ..Thanks...

    Have a nice day..

    Feb 21, 2011 | Eltax Atomic A-10.2R Speaker

    1 Answer

    My lexicon alpha is only a year old. line in 1-2 on the back has a distorted humming noise when any device is plugged in. What could be the problem and how could i fix the problem ? Thanks.


    The probable cause is a ground loop. You haven't said what you are plugging in. These inputs are BALANCED lines and you MUST use TRS cables driven by TRS outputs of the thing you are driving it with. ALL interconnected equipment MUST be powered by the same receptacle or power source.
    IF the thing you are driving it with does not have balanced outputs, then procure a DI (Direct Input) box and use an XLR cablle between the DI and the Alpha and set the DI on ground lift.

    Dec 28, 2010 | Lexicon Alpha Personal Recording Studio

    1 Answer

    Fender Frontman 65r Grounding Issues


    Hi,

    It could be a grounding problem with your inputconnector.
    There could be a bad connection between the jackinput and the faceplate/chassis.

    HNY Gerard

    Dec 05, 2009 | Audio Players & Recorders

    6 Answers

    Noise coming from cable


    have you tried a new coax it could be shorted some you might want some heavy duty cable and good connectors

    Feb 08, 2008 | Televison & Video

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