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hum

  1. S

    Dynaco Pat 4 hum troubleshooting

    Hi All, So I've got a Pat-4 that started to hum recently. I've had it for decades, and this just started happening. A few observations: - The hum is NOT dependent on the pre-amp volume channel, balance treble, hi filter, mono/stereo, or the loudness. - The hum gets worse when turning up the...
  2. F

    Pioneer SX-626 Tuner hum

    Recently acquired another SX-626 (1973 version). After checking it out I powered it up, there was a noticable hum in the tuner, nowhere else. After I completely recapped the unit (including the AWE-031-0 tuner assembly) and set the bias to 18mV the hum remains. Any ideas?
  3. SCAPE_GOAT

    Loud hum from speakers while in phono - what am I doing wrong?

    I’m experiencing loud, bass-y hum from my speakers when turned to phono on my receiver, even with the volume low. It’s an old Pioneer PL-15D II turntable. I’m trying to figure out what’s going on. I’ve got everything hooked up correctly, but the GND post on my receiver (an SX- 580) is rusty. The...
  4. xxbackslash

    need help with old rca console

    i have this late 60s rca victor(vjt34L) console that hums when i turn it on. the hum goes away immediately after i turn it off. im pretty sure its the capacitors. when looking through the back of the cabinet i see one on each large speaker and one big one on the main control area. i plan to...
    • xxbackslash
    • Thread
    • 1960's advice buzz capacitors help hum rca victor solid state vinyl vjt34l
    • Replies: 2
    • Forum: Solid State
  5. T

    Power control hum

    Gear is a C712 and a pair of MC7100s feeding biamped speakers. Only balanced connectors are used for audio It would be really nice for the 12v power control feature to turn on the amps with the preamp, but hooking them up introduces a low-level but annoying hum. Any thoughts? Looking at the...
  6. bscepter

    Marantz/Thorens hum in stereo, not mono.

    Been chasing this gremlin a while... I have a Thorens TD-145 into a Marantz 2250B into a pair of Dynaco A-25s, and it sounds great. The cart is an Ortofon Super OM 20. When I first turn it on, everything's fine. But after playing a while, there is a faint 60-cycle hum present. It is only in the...
  7. M

    Pioneer QX-8000 Hum issue

    Hi, Here is a bit of a mystery which I have been unable to solve. I have just finished a rebuild of a very nice quad receiver (with the exception of the tuner board) changing out all of the electrolytic caps and all of the transistors on the tone and Q boards (plus a pair on the phono board)...
  8. TimeRepublik

    Help me troubleshoot a SME 3009 hum issue

    Hello everyone, I have an SME not improved on a TD 124. I get a hum only with a specific cartridge (Ortofon 2M Black). I'gve tried it with a Shure V5 and a Pearl Black and there is no hum. I've also tried that catridge on a different arm and it still hums. So ut's definitely the Ortofon or the...
    • TimeRepublik
    • Thread
    • hum ortofon 2m black sme 3009 sme 3009 non-improved td124
    • Replies: 0
    • Forum: Turntables
  9. DoctorJon

    Vintage Record Player Humming/Buzzing!

    Hello, I recently acquired what I presume to be a Sylvania Record Player from the 1950s. It plays records excellent without problems, however.... it has this buzzing coming from the speakers that can't be ignored when on medium/high volumes. It only starts when the record turntable is engaged...
    • DoctorJon
    • Thread
    • 1950s buzz fix ground hum noise phonograph record player repair vintage
    • Replies: 50
    • Forum: Turntables
  10. A

    Marantz 1030 repair - left channel noise

    Hi all, I´m new here. My Marantz 1030 has a loud hum/noise in the left channel, right is ok. The noise is there with volume at 0, I´ve made a little video to demonstrate: I´ve built a couple of effects pedals, so I know a little about reading schematics and I can solder, but this is completely...
    • artrr
    • Thread
    • 1030 hum left channel marantz repair
    • Replies: 8
    • Forum: DIY
  11. YachtRocker

    Dual 1219 Humm issue.

    I know this has been talked about before but I thought I would throw these questions out as I'm not quite narrowing it down yet. The Issues: When I power up the TT I can hear a humm, more on the left then right, I can readjust the cart and sometimes is goes away other it doesn't. When I start...
  12. P

    Dead NAD 106 preamp

    Hello, First post here - thanks for reading! :) I've bought a used NAD 106 preamp. I know it's nice, but not this one - is hums all the time when connect to amp or active speakers. Sound like 50hz hum from the psu. Everything looks very nice on the pcb and no visual errors to be seen, the pcb...
    • Peer
    • Thread
    • hum nad nad 1000s nad 106 noise preamp
    • Replies: 12
    • Forum: Solid State
  13. lenos

    HF-81 (and general) grounding question

    I recently completed a ground up rebuild of an HF-81 using all new components except transformers, switches etc. It took a bit of debugging to get it all going but then I had a few moments where I could hear what this thing might be capable of before other issues popped up. One of the things...
    • lenos
    • Thread
    • ground hf-81 hf81 hum
    • Replies: 14
    • Forum: Eico Place
  14. Morphy

    [Help] Turntable Hum Problem (Pro-ject Debut Carbon)

    Hi there guys, I really need your help.. I don't know a better place to ask then on an audiophiles forum. I've uploaded video to YT describing my problem (it was easier like that I guess). My knowledge about this issue is really limited unfortunately.. :( Thanks in advance, Morphy.
    • Morphy
    • Thread
    • hum humming noise sound turntable
    • Replies: 42
    • Forum: Turntables
  15. NickDeO

    SX-680 Restoration Troubles

    Hello, AK! Recently, I picked up a Pioneer SX-680 for $30. The guy I bought it from claimed that no sound came out due to a cracked PCB. Nice guy he was, he was even willing to open the thing up in his kitchen to show me where it was. I've since glued the cracked board and repaired the...
    • NickDeO
    • Thread
    • buzzing hum humming pioneer repair short shorted sx-680 troubleshooting
    • Replies: 80
    • Forum: Pioneer Audio
  16. buck1108

    Acoustic amplification ag60 - loud hum

    I am working on an acoustic amplification ag60 amplifier. I was told that it quit working after a nearby lightning strike. This amplifier is making a loud humming noise and there is no audio signal from the input coming out of the speakers. However, there is a mix of a hum and audio input coming...
    • buck1108
    • Thread
    • acoustic amplification amplifier hum
    • Replies: 6
    • Forum: Solid State
  17. N

    New Cartridge Big Hum no Music

    I have an Bang & Olufsen RX TT and it had an MC 5 cartridge. It played vinyl but volume was soft but could be heard through the speakers. Sent cartridge off to be retipped to a nude MC 3. Installed and all I get is a hum which increases with volume. The ground is tight and the RX phono cables...
  18. cadillacmike

    How do I reduce hum - Dual CS521

    OK, so I'm getting back to listening via the HiFi equipment and the turntable produces varying amounts of hum - sometimes. Turntable is a Dual CS521, receiver is Harman Kardon 930. With the Micro Acoustics 530MP cartridge, it was barely there. However It is more pronounced with the MA 2002e...
  19. S

    60Hz triangle wave hum Marantz 2270

    I just acquired a 2270, and did a full re-cap. There's a 60Hz triangle wave hum I can measure with a scope (which may or may not have been there before) that gets louder with increased volume, independent of source selection. I can also still here it when I disconnect the pre-amp, but it no...
  20. W

    Akai AP-100c picking up motor hum

    Hey, I just bought a used Akai AP-100c turntable in great condition except...the stylus seems to pick up the hum of the motor. It is not a ground wire issue, nor an RCA cable issue. There is no hum till the needle touches the record. The hum continues if you manually stop the turntable from...
  21. runningdog

    2275 hum on unloaded Aux and Tape 1 inputs

    Is it normal to have a low volume hum when the input jacks for the selected source are unloaded? I know it is normal for Phono inputs. Set the Selector to Aux, and turn the volume waaay up. Low hum in both channels. Plug a CD player into the Aux input jacks and the hum is gone. Same result...
  22. M

    Any suggestions?

    I recently picked up a 1980s Sansui amp, tuner, turntable and cassette deck for pennies . I know these were made after the great days of Sansui but the turntable is fine - direct drive and sounds good. The tuner works too. the cassette deck has liquified belts and I thought initially that the...
    • M1keC
    • Thread
    • amplifier capacitor hum mains
    • Replies: 0
    • Forum: Solid State
  23. stilldreamin

    500b - Loud buzz in Tape Head & Phono IF inputs unplugged.

    Hi all, I just received a Fisher 500b. It's great, but I immediately noticed a very loud, constant buzzing hum if Tape Head is selected. I have no tape players of any description, so there is no connection and no signal going into the Tape Head inputs. Out of curiosity, I pulled out my Phono...
  24. T

    1959 Zenith Question- Capacitor?

    Howdy Folks! I joined this forum because I stumbled upon a 1959 Zenith Rigoletto SFD 2575 L at a local shop, and now it lives with me. Hoping some gurus here might have a pro tip or two on an issue it has. I love this thing, and want to keep it forever!!! Turntable works, stereo works. But...
    • TedB
    • Thread
    • 1959 2575 buzz capacitor hum rigoletto zenith
    • Replies: 6
    • Forum: Tube Audio
  25. L

    Marantz 140 - Buzz/Rumble/hum issues

    Hello there, In the past, I had issues with the left channel of my Marantz 140. I serviced my Marantz 140 as : - Changed the big cap for two 15 000uF 63V Mundorf - Changed all the transistors except the pre driver and drivers on left channel - Changed two diodes on both channels - BIAS and DC...
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