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60hz

  1. M

    MC30 60hz hum

    I recently acquired a pair of MC30's. One was original which I replaced caps and rebuilt the PS w/ silicone diode and bias resistor. This MC30 works great. The other MC30 was built by another person with all new caps and resistors. That MC30 has a steady 60hz hum on the speaker output...
  2. Fasturd

    Pair of Dynaco Mark IV buzz. SOLVED

    New to the Dynaco world. My new to me Mark IV amps have an identical buzz that is too loud to ignore. They were partially updated prior to my ownership and did not buzz at the sellers home. I do not know the make of the boards yet but they are currently running 1 Sylvania 6GH8A on each board...
    • Fasturd
    • Thread
    • 120hz 60hz 6gh8 buzz dynaco mark iv problem solved
    • Replies: 69
    • Forum: Tube Audio
  3. jpatti75

    Slight Hum (‘61 Motorola Console)

    Hi gang, I am getting a slight hum from the speakers on my ‘61 Motorola SK70 console, and I assume I am picking some interference due to poor power and speaker cable routing on my part when I restored all the innards. The unit originally had a very pronounced 60hz hum, but that was resolved...
  4. 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
  5. Z

    MA 6100 60hz hum

    I have Macintosh ma 6100 and I have been using it for a while combined with a dac through aux input. It always had a low, barely noticeable 60hz hum through both speakers. I just got a turn table and unsurprisingly the hum is more noticeable through phono input. The hum is present without any...
  6. macman007

    Marantz 1200 buzz noise left speaker only,.. coupling cap or something else?

    Hi folks, the faithful 1200 has developed a hiccup lately. Seems after playing a while, especially very quietly, or when sitting idle in between titles, after about an hour of running, I hear quietly very quietly a buzz with some 60hz , going up and down. It comes and goes, for about a minute...
    • macman007
    • Thread
    • 60hz buzz capacitors coupling caps marantz noise
    • Replies: 2
    • Forum: Marantz Audio
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