• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

60hz hum

  1. D

    Help tracking down 60hz Phono Hum HK 330C

    I've been working on restoring a Harman Kardon 330C. I finished recapping the power supply, tone control, amp, and eq/phono board as well as replacing the 2SC1344 and 2SC1345 transistors on those boards with KSC1845's. Was getting ready to put it back together and noticed a faint hum in the...
    • dups68
    • Thread
    • 60hz hum harman kardon 330c help needed phono buzz
    • Replies: 16
    • Forum: Solid State
  2. Marc92FS

    Rotel RSX-972 no audio output, 60Hz hum instead

    Hi, people... new to this forum. I have a 20 y.o. Rotel RSX-972 that worked perfect until the infamous memory supercap gave up (about 10 yr or so). Nonetheless, I still continued enjoying it, leaving it stand-by in order not to lose settings. From time to time, after unplugging it or after a...
    • Marc92FS
    • Thread
    • 60hz hum rotel rotel receiver rsx-972
    • Replies: 6
    • Forum: Solid State
  3. C

    Bay Audio Sub

    I have a Bay Audio sub-woofer that developed 120Hz hum when plugged in but not turned on. When it is turned on a loud 60Hz sound is heard. I'm thinking power supply caps. Anyone have thoughts or suggestion on trouble shooting this problem? Thanks, Chuck
  4. 0kazaki101

    Audio Hum out of only Right Channel of System

    I recently got a hold of a cheap beFree Sound BFS-440 5.1 Channel Surround Bluetooth Speaker System. After a few weeks of the unit working completely fine, there came a day where an audible 60hz hum started coming out of both right speakers (front and back). The first day it started, it wasn't...
    • 0kazaki101
    • Thread
    • 60hz hum ac hum cheap speaker system hum hum in right channel transformer hum
    • Replies: 5
    • Forum: DIY
  5. Cody AOC

    How Do I fix my Ground Loop Problem?

    Hi so I bought two Art EQ355's and they both give me a 60hz hum with my subwoofer and I have connected the eq on different circuits and it still does it I even disconnected all audio inputs to the eq and had the sub connected to the output of the eq and still get a hum I have heard about ground...
    • Cody AOC
    • Thread
    • 60hz 60hz hum amp amplifier audio equalizer ground loop ground loop isolator hum sound
    • Replies: 7
    • Forum: General Audio Discussion
Back
Top Bottom