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hum

  1. J

    Sansui AU 517 with hum in both channels...

    About the amp... I cleaned, recapped, and did all of the traditional upgrades to my AU517 (fusible resistors, diodes, etc.) and the amp was running fine and sounded great for about five years. Recently, it refused to come out of protection so I opened it up and worked through the protection...
  2. N

    Sansui 1000 hum? What does the HUM. Balance 100 ohm do?

    Info for Sansui 1000 not the 1000a Looking for advice on eliminating low level hum/buzz on right channel. I’ve recapped it. Replaced the 6an8 and PL36 tubes with matched sets. I’m still getting a slight hum on right channel. I’ve swapped tubes but still getting a buzz. If I reverse channels...
    • noise415
    • Thread
    • hum hum. balance resistor sansui 1000
    • Replies: 21
    • Forum: Tube Audio
  3. Brice

    Little Heathkit SA-2 hum trouble - FIXED -

    Hi guys, I bought a couple of years ago a Heathkit SA-2 amplifier, but I don' t know why. This is a full integrated stereo amplifier with phono sections. A nice little amp to have in an office. I then decided to dive into it and restore as it is extremely clean and beautiful, with the same...
    • Brice
    • Thread
    • heathkit hum sa-2
    • Replies: 13
    • Forum: Tube Audio
  4. M

    Rotel RCC-945 Ground Issue

    Hello I'm currently troubleshooting a Rotel RCC-945 cd player. It has what seems to be a ground hum. The noise starts at power up when the relay switch clicks (this relay is located by the output terminals). I re-soldered some solder joints that looked suspicious to the eye. These include the...
  5. Florida Spin

    Elac PPA-2 phono pre hum

    Does anyone have any idea how much 60hz hum a typical PPA-2 will emit? I just bought one and I’m concerned about the level of noise. Thanks- if this is the wrong thread category- please forgive me. Yamaha GT2000L Hana ML Cambridge Azur 851A Revel M106
  6. brainbanger

    CT-F 9191 hum on both channels in play

    Hi guys, it has been quite a while since I posted something here. Now I am stuck fixing the hum in a CT-F 9191. The hum occurs when pressing the play button and is equal on both channels (meters show around -20db). This can be reproduced even without a cassette (relevant switches engaged). It...
  7. polhem

    TV makes audio hum sometimes

    I have my new LG OLED C9 TV connected to my hifi system. All hifi components and the TV's comes from a Monster HTS 2600 power supply. The TV makes the audio system hum, but only sometimes and whrn certain images are displayed. The hum goes away if I connect the TV to a different power outlet...
  8. CrazeeD

    Nikko Alpha 450 buzz until warmed up

    Hello All, I have a Nikko Alpha 450 power amp that buzzes until warmed up (10 min or so), after that its quiet and sounds great. It's not a crazy loud buzz but it's certainly enough to annoy. A little backstory, I have recently replaced 1 filter cap as it had leaked and wasn't even making...
  9. Johnny_Law

    Solving a Yamaha RX-V430 Ground Buzz / Hum

    My brother's old AV receiver sounded great ... but had a buzzing hum coming from the speakers which became noticeable at really low volumes. The buzz remained the same volume and pitch regardless of input, volume, input mode, etc. It was present via headphones as well...
    • Johnny_Law
    • Thread
    • buzz ground hum rx-v430
    • Replies: 5
    • Forum: Yamaha
  10. V

    Marantz 2285B static noise and weak channel

    Hello AKers ! :) First of all, sorry for my poor English, i'm a french reader of this forum. I have a problem with my beautiful Marantz 2285B, which has been completely recapped (except FM boards, main dual-core filter capacitors and the output transistors). When I turn it on and after the...
  11. Judasentinel

    Oh no!! Not Another Turntable Feedback Thread!!

    I know this topic has been discussed ad nauseum, but every situation is different and no two scenarios can offer the exact same solution. So here is mine. I hope that you guys can help me with it. Equipment: Audio Technica AT-LP120X USB turntable with VM520EB stylus set to 2g tracking force...
  12. Brivan

    Pioneer SX-1280 with Hum in the Audio

    Hello, everyone I've been trying to diagnose a low-level audio hum in a Pioneer SX-1280 but, so far, have come up with nothing. I've read other threads in the Pioneer forum that have dealt with the same hum issue, but my situation appears to be a bit different from the others. The receiver...
    • Brivan
    • Thread
    • hum pioneer pioneer sx-1280 sx-1280
    • Replies: 41
    • Forum: Pioneer Audio
  13. P

    Marantz PM550 DC - Restoration advice desperately needed on "where to next"?

    Hi team So I posted a few months back when I found this great looking Marantz amp online https://audiokarma.org/forums/index.php?threads/marantz-pm-550dc-sound-output-distortion.985180/ From that thread I had posted... "The main issue is the sound output. At a low volume there is a distortion...
  14. bzenic

    SX-650: 3-4 s of Playback and 3-4 s Of Hum

    After I recapped the tone board and recapped and replaced all transistors on the vertical amp board (except the two on the heat sinks) I get only periodic playback of about 3-4 s and then the period of hum. This same sequence repeats on and on...you got the picture. What would be the most...
  15. M

    Pioneer SA-900 hum

    I have a Pioneer SA-900 that I’ve been working on that developed a hum after the main filter caps had been replaced. When that happened, I took out the new ones and tried the old ones again, but the hum persisted. I had been following the thread as a guide for the current project. i have...
  16. H

    Yamaha P2200 hum

    My P2200 was recapped by me and has been performing beautifully but has just developed a hum. Diagnostics listed below. Please can anyone suggest the most likely cause and likely location? All input sources disconnected, the hum is present. Hum can be made louder or even disappear, by rotating...
    • Hifibythekg
    • Thread
    • hum p2200 power amp yamaha
    • Replies: 38
    • Forum: Yamaha
  17. edwinh

    Thorens TD160 and Grado

    I have been getting my vinyl situation together. I have a TD160 that works reasonably well and I'm going to have it gone over. Before I do that, I want to figure out the optimum, although not too spendy, cartridge for it. I have a Grado Silver Mk. I and honestly, I love the sound I get, but...
  18. T

    Brimar CV4035 and Fisher 400

    Hi. I am having difficulty finding Brimar CV4035 tubes that work well with my Fisher 400 (late series), specifically the phono stage. I have purchased 4 NOS tubes, a set of two each from two different reputable tube dealers. Out of the 4 tubes only one does not produce a hum in the phone...
    • Tubes4Wx
    • Thread
    • fisher 400 hum phono tubes
    • Replies: 1
    • Forum: Fisher
  19. A

    Remove hum/buzz from Thorens TD 160 turntable

    Hi everyone, I need help trying to eliminate a hum/buzz I have between my Thorens TD 160 turntable and a Denon PMA-700V amplifier. Sorry if there is any misspelling, I am not english native. I was having problems with the turntable because it was only playing one channel intermittently and I...
    • albert3d
    • Thread
    • buzz denon hum pma-700v td 160 thorens
    • Replies: 29
    • Forum: Turntables
  20. H

    Yamaha C4 preamp fault. Hum. Phono switches.

    Have done a lot of work on this preamp and am starting a fresh thread because several faulty components have already been replaced or repaired and am hoping it may now be much easier to isolate and identify the problem. The issue: Hum is present on all inputs. -Playing vinyl on Phono 1 and 2...
    • Hifibythekg
    • Thread
    • earth ground hum hum noise preamp noise preamp yamaha yamaha c-4
    • Replies: 116
    • Forum: Yamaha
  21. nickhead

    Nakamichi TA-2A with an interesting problem

    Hey guys! Yes, I have returned from the grave :-) We got custody of our granddaughter and I haven't had the time or energy to do much electronics work. But I did pick up another of my favorites a few months ago. An almost mint TA-2A. Just now getting around to open her up. She's been...
  22. 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...
  23. D

    VPI Prime Hum - Lemo connector

    Hi: I have a VPI prime with hum at higher volume. I grounded the lemo connector today and the hum stopped. Any ideas why this would happen?
  24. tlite

    Crown XLS 1002 Causing Hum In Circuit- help!

    Hi There, Just got a used Crown XLS1002. When plugged in to any outlet, strip, or power conditioner I have available near my receiver, it introduces hum (not hiss) into the speakers. Using a new Integra 3.4 receiver. Worthy of note- the Crown didn't come with a power cord, so I tried two...
    • tlite
    • Thread
    • amp crown xls 1002 hum integra noise onkyo receiver
    • Replies: 14
    • Forum: Solid State
  25. P

    Marantz 2245 restoration... hit a snag and need some help, please!

    Hello AK'ers! I'm new here. I don't have a lot of knowledge but I've restored a couple of HK330's, one wasn't working, and recapped a Tandberg TR1040 without issue. I picked up a 2245 that the previous owner said "...had a quieter channel, so an output transistor was replaced and now it...
    • pkcain
    • Thread
    • high dc offset hum marantz 22xx output transistor relay click
    • Replies: 9
    • Forum: Marantz Audio
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