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noise

  1. D

    Sansui G9000 hums as soon as speakers are switched on

    I recently spent alot of time & love on my G9000 (Full thread here: https://audiokarma.org/forums/index.php?threads/sansui-g-9000-yet-another-protector-wont-come-off-thread.1095294/) It's got two new F2806 boards , new power caps (with these boards: Moderator note: link to eBay removed as that...
  2. Leestereo

    Leestereo Mods, Tweaks and Tips for the Sansui 771

    Part 1: Random "Popping" Noise This 771 exhibited random "popping" noise in both channels; measurement of the DC offset at the speaker outputs, demonstrated that the reading would fluctuate widely, reaching at times, several hundred mVs. This behavior was independent of input source and was...
    • Leestereo
    • Thread
    • hiss hum modifications noise restoration sansui 771 tweaks upgrade
    • Replies: 93
    • Forum: Exclusively Sansui
  3. D

    Fisher 250 rumbling noise

    Hello, my 250 has a low frequency intermittent rumble (on all input sources, without input present). The noise increases with volume increase. Sounds as if there's some sparking somewhere in the circuit. Otherwise, it sounds great. Any advice will be appreciated!
    • Dejan52
    • Thread
    • fisher 250 noise
    • Replies: 0
    • Forum: Fisher
  4. F

    Sansui AU-222 Hissing Noise

    I got a Sansui AU 222 (Recap & Recable) that made Hissing Noise when volume increased but the noise reduced when I set volume to middle. Also when Treble is turn all the way left (counter clockwise) the Hissing Noise is gone. I suspect some parts in Head Amp section create these noise. Thanks...
  5. Roman68

    Discman Welltech. NO MORE NOISE! My story.

    Good day to everyone! I encountered an issue with the drive of a CD Discman, and I think this story might be useful to many fans of these players. I’d like to share the repair process of a CD Discman from the 2000s by Welltech. I bought it for a few euros as a non-working unit and brought it...
    • Roman68
    • Thread
    • cd player discman laser mp3 noise portable player repair restauration walkman welltech
    • Replies: 6
    • Forum: Digital Sources
  6. S

    Sony 7055a noise and buzz

    Hi all! Unfortunately my receiver has multiple noise problems. 1. Constant hiss at any volume, even volume pot is on 0. 2. Variable buzz only in the right channel, which depends on volume pot position. (when the buzz is present, the left channels hiss also changes a bit in the same way) I'm...
    • szdonat
    • Thread
    • buzz hiss noise sony sony 7055 sony 7055a white noise
    • Replies: 0
    • Forum: Solid State
  7. drabina

    Need help with motor noise (Thorens TD 160 turntable)

    This Thorens TD 160 turntable is in pretty good shape but the motor makes noise when switched to 33 speed. There is no noise when switched to 45. Noise is present with platter, without, with belt and without the belt. Here is a sample I recorded: Sample noise - video The noise is a bit...
  8. econeditor

    Where is the distortion coming from?

    I've been dealing with intermittent distortion coming from my setup for a while. The core of my system is a Realistic Lab-250 turntable going through an NAD 3020b. I'm currently using a pair of Klipsch Fortes, but it's happened with other speakers as well. The NAD was thoroughly restored earlier...
  9. P

    Tuner whistle noise in FM

    A high pitched noise just started with FM in SX-980. Sound frequency is 4.468 kHz. Starts after running normally for between 5 and 30 minutes. I am going to be checking the FM path for signal and voltages but maybe someone has an idea what this is? thanks! audio via youtube. frequency...
  10. T

    Looking for help diagnosing buzz/hum/ground loop in my "HIFI" GUITAR rig!

    I have been experiencing a bad, loud, and variable noise in my electric guitar rig. Here is the details of the rig (I will include as many details as possible since ground loops are tricky): > Electric Guitar (active electric guitar with on-board buffer, 9V battery, and On-Board Effects Loop...
  11. P

    Sansui AU-317 phono stage - small popping sounds and then massive, loud banks and pops through speakers on high volume

    The abovementioned amp produces a random symptom, where sometimes while listening to a record, it starts popping (like static pops) followed by massive, extremely loud bang noises and continued pops. When powering down and disconnecting the TT, the phono input (both subsonic and regular) keeps...
  12. mb21111

    Pioneer SX770 left channel preamp out hiss

    My SX770 has a hissing noise only heard on the preamp RCA out on the left channel. It is the same volume regardless of how loud the volume is turned, and is present regardless of which input is selected. Any idea which transistor may be the culprit? Everything else works perfectly.
    • mb21111
    • Thread
    • channel hiss left channel noise out pioneer pre out preamp sx770 transistor
    • Replies: 4
    • Forum: Solid State
  13. kevka

    JVC JR-S400 with a noise problem, any ideas?

    Hello and best regards! I have a JVC JR-S400 “Mark I” that is looking for some use. However, it doesn’t quite work as I had imagined. In and of itself, everything is almost fine, but there is always some sort of noise in the background that can also be influenced by changing the volume control...
    • kevka
    • Thread
    • amplifier jr-s400 jvc noise receiver
    • Replies: 0
    • Forum: Solid State
  14. E

    Pioneer SA-606 noisy output

    Hello to everyone, I have a problem with my SA-606 (SA-6700 version for Europe): There is an hiss similar to white noise through the headphone output. In the past I did some maintenance: 1) Recapping - used Nichicon "audio grade" KA series (light blue sleeve) for everything but main filters...
    • EqualSign
    • Thread
    • amplifier bias hiss noise recap sa-606 sa-6700 transistors
    • Replies: 0
    • Forum: Pioneer Audio
  15. E

    Pioneer SA-606 noisy headphone output

    (moved to Pioneer audio - my bad)
    • EqualSign
    • Thread
    • amplifier bias hiss lamps noise pioneer recap sa-606 sa-6700 transistors
    • Replies: 0
    • Forum: Solid State
  16. psychoanima

    Crackling noise on ADCOM gcd 575

    Hello everyone! I bought this old cd player because I heard great stories about 1541 dac, and this player in general. Anyhow, playing some discs I noticed some random noises in the music, and they are getting more common from mid to the end of disc. These random noses are really hard to...
  17. 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...
  18. B

    Marantz 2220 tuner string noise

    I have cleaned and relamped my Marantz 2220. All is working great except when I move the turner up and down the dial, at some points there seems to be some very light resistance where is sounds like the string is making binding noises. Not very loud but audible for sure. I have looked and all...
    • Barry Dollar
    • Thread
    • marantz 2220 noise string tuner
    • Replies: 0
    • Forum: Tuners
  19. E

    Sansui 9090 noise dead end

    Hello everyone, First of all, thanks everyone for all this knowledge shared in this forum. I am restoring a Sansui 9090 early production that was not working. It had plenty of issues that I had to fix (some output transistors failed, driver board, protection, service bulletin not applied)...
  20. CrazeeD

    How much ripple is too much ripple?

    Working on an amp that is noisy (110hz hum) and I’m measuring 250-300mV of ac ripple when cold dropping back to about 200mV when warm, off the power supply. I thinking this is too much and likely the source of my noise. Am I on the right track here or totally wrong?
  21. CrazeeD

    Nikko Alpha 450 Noise

    Hi all, me again. Still trying get the noise out of my Nikko Alpha 450. I have posted about this problem and had some great suggestions offered, the problem however persists. As a recap, this unit had a bad main filter cap (there are 4) that had leaked and was no longer making contact with the...
  22. 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...
  23. CrazeeD

    Nikko Alpha 450 noise

    Hi All, having a weird problem with a Nikko Alpha 450 power amp I'm working on. I've posted here before regarding this amp and the suggestions were invaluable. I've re-capped the power supply as 1 of the big filter caps had leaked and wasn't even making contact with the board. The amp sounds...
  24. Impact

    Realistic STA78 Resistor/Transistor fun

    Looks like il be adding to the fun as I am as well a STA78 owner that has crackling/popping out of only the left channel. After searching the forums, I put together that this is likely a bad transistor and decided to start doing a cold test of the transistors using super cold spray. During...
    • Impact
    • Thread
    • noise realistic resistor squealing transistor
    • Replies: 2
    • Forum: Solid State
  25. A

    Help with Pioneer phono input

    Hello everyone. I have an old Pioneer amplifier SA 710. It has always worked very well, but for this morning the Riaa channel (left channel), emits almost exclusively static noise and Crackles. All other inputs (tuner, tape 1 and 2, aux) work very well. The static noise and the crackles increase...
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