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fm

  1. 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...
  2. Anaxas

    Technics SA-500 No FM - 2SC1047 voltages

    Hi, On my Technics SA-500 the FM suddenly went 'mostly' out .. but quite faint when the muting is off, and silent when the muting is on. AM never worked for the couple of years that I owned it. While trying to find the issue I measured the transistors and Q2 ( 2SC1047 ) has an emitter...
    • Anaxas
    • Thread
    • 2sc1047 an377 fm sa-500 technics
    • Replies: 18
    • Forum: Solid State
  3. Moonwatcher

    1965 Calrad tube tuner (model 202M) signal cutting out

    Hello, all. This Calrad tuner has been working perfectly, but suddenly the sound is cutting in and out and then completely out. It usually sounds great for five or ten minutes, then it just goes silent and the signal strength meter shows no life. Most all of the tubes seem to be lit, but I was...
    • Moonwatcher
    • Thread
    • calrad fm intermittent tube tuner
    • Replies: 21
    • Forum: Tuners
  4. richardg0n

    McIntosh MX 112 FM/AM Stations Suddenly Gone

    Greetings AK, I was listening to FM stations on my MX112 and noticed FM reception began fading and a short while later I could no longer receive FM stations. I noticed the tuning tube is still on but no longer fluctuating while tuning in stations. A few years ago I recapped the power supply...
  5. Ron Brown

    Radio During the Day or at Night, AM or FM?

    When do you primarily listen to the radio? Do you prefer the daytime programming full of commercials or the generally less-commercial night-time listening? Do you prefer the fidelity and lack of noise on FM or the silky warmth and power of AM? Do you listen to AM stereo? Do you like FM mono...
  6. berkemo

    Vintage Radio Strong Station Distortion

    Working on a Motorola Model: 13KT15CW Chassis: Ch= HS-677. Just finished recapping the filter caps, all paper caps, and cleaning tube leads. The amp sounds great but the radio needs some tweaking. Generally it works pretty well but the issue at hand is that I've got a couple of strong signal...
    • berkemo
    • Thread
    • alignment am distorion fm fm alignment magic eye radio radio console radio repair reception
    • Replies: 7
    • Forum: Tube Audio
  7. Wilburchubs

    Sansui TA-500 No FM or Meters

    Hi folks,having trouble with the TA-500 receiver, everything great via other sources,and AM,but the FM side is silent,no meters,no sound at all,not even static with muting switch off.There is a momentary noise (sounds like static but too short to really tell)when selecting but thats all. Any...
  8. ocdecio

    2270 - Flickering stereo due to noise

    This is another case of FM stereo on a 2270 that I've not seen before. From what I could measure, the noise detection circuit is preventing stereo from holding - it flickers once in a while and it follows the noise signal at J555. I am wondering if a noisy transistor in the IF section could...
  9. Moonwatcher

    2230 FM exhibits annoying raspiness

    Hi, all. I found a 2230 in a nearby town for an incredible price, and it's almost perfect except for two dial lights. I'm truly astonished by the fullness of the sound into KLH Sixes, which I thought only possible with tubes. I even began thinking about selling my beloved little Magnavox...
  10. goldswimmerb

    Sansui 7000FM Muting Question

    Hey, so I have a Sansui 7000 here want wanted to know what the normal behavior of the FM muting is with this unit, basically this one seems to not mute without an antenna, once an antenna is added FM muting works as it should, muting between stations. I've tried adjusting the muting threshold...
  11. JB8

    PIONEER SX-2500 FM Stereo Distortion ++

    Hey Pioneer experts and enthusiasts! I have a beautiful SX-2500 that I've grown quite fond of (damnit) shouldn't have let myself get attached but here we are... Overview: Autotune seems to work but I'm not worried about that for now Has moderate ground hum, not a crazy-loud one, but annoying...
    • JB8
    • Thread
    • fm ground hum pioneeer pioneer sx 2500 stereo distortion
    • Replies: 17
    • Forum: Pioneer Audio
  12. E

    Found a Sansui 9090db in a bulk collection pile need some help! :)

    Howdy everyone! It was working yesterday, and for part of today. what I noticed was the sound to the speakers was working intermittently, then poof, no sound. I also found a Pioneer PL560 which would play albeit quietly. I figured being plugged into phono, it wouldn't need a preamp. So today...
  13. C

    Kenwood KR-5200 no stereo in FM

    Hello, I’m pretty much new to this so any help would be greatly appreciated. I have a Kenwood KR-5200 and I have no stereo in FM only and also no stereo light. I have checked the bulb and it is good and also I am getting great reception. It just doesn’t play in stereo when playing FM...
    • chyde99
    • Thread
    • fm kenwood kr-5200 no stereo tuner
    • Replies: 46
    • Forum: Tuners
  14. JB8

    PIONEER SX-440 FM Reception - Magic Loop?

    I'll keep this short! Picked up my first 440, cleaning it up, 90% of the lights were burnt out, etc. After replacing the lights I found the signal meter and stereo light to be responsive, but, even with an FM antenna attached I wasn't getting much action for either. Then when I touched the...
    • JB8
    • Thread
    • fm pioneer sx-440 reception tuner
    • Replies: 12
    • Forum: Tuners
  15. Gustavsson

    2220B - FM poor reception/static - solved

    When the top metal cabinet is screwed in place I get very poor FM reception. There's a lot of noise and static. But if I take the cabinet off it sounds great. The static and noise completely disappears. So the cabinet is interfering with the FM signal somehow. Any ideas on how to get rid off...
  16. A

    New FM tuner boards for Sansui 5000 series

    I just recently acquired a Sansui 5500 receiver and much to my dismay the FM tuning started to go bad. The signal level and tuning meters indicate that it’s getting a strong FM signal, it’s just that there is no FM sound. At first I thought that the problem was the FM mute button, but I just...
  17. PE9ZZ

    Front End LO/RF Tracking and Alignment

    Some time ago I made a spreadsheet in order to optimize the tracking of the local oscillator and the RF circuits in an FM front end. The most interesting finding is that this alignment should not take place at the band ends (88/108 MHz) but rather at 90 and 105 MHz. In case of the well-known...
    • PE9ZZ
    • Thread
    • fm front end local oscillator tracking tuning alignment
    • Replies: 20
    • Forum: Tuners
  18. kappclark

    Need help with Sangean HDT-20

    I recently purchased through the Amazon Warehouse a Sangean HDT-20, and might be experiencing some buyer's remorse... Very strange, but the only stations which come in as stereo are the 2 HD Radio signals I receive...every other station comes in as mono -- I cannot get a stereo FM signal.. I...
    • kappclark
    • Thread
    • fm hd radio sangean
    • Replies: 12
    • Forum: Tuners
  19. M

    HELP Scott R-306 Receiver tuner problem

    I got just got this reciver. Everything works perfectly except FM is not detecting stereo. Can anyone help me please where to look. My experience with radio is limited.
  20. AudioJuice

    FM Antenna Improvement for Receiver

    I’d like to improve the quality of my FM antenna and am struggling to research exactly what I need. I have a Sony STR-DH770 receiver. The manual calls the antenna type an “aerial” antenna (single wire). It gets decent reception, but never for all the stations at once. I have to move it around...
  21. M

    Scott R306 reciver FM problem

    I got this reciver with some main amp transistors problems. Replaced 4 of them and its working fine but I have a problem with the FM ot is not detecting stereo. Working only in mono and the sound is fine. As blind guess i replaced C133 but it didn't help i tried the reciver with C133 removed...
    • Mmeissa
    • Thread
    • fm radio scott scott r-306 stereo
    • Replies: 4
    • Forum: Solid State
  22. Sglaw461

    FM from left side only.

    I posted this in the Pioneer forum, this might be a better place. Client brought in a Pioneer SX-650 and said it was only working in mono. After a test it seems it is working in stereo on all inputs except FM. The Stereo light never comes on. I am good with amps, pre-amps etc but not so much...
  23. Sglaw461

    SX-650 with FM on left only

    Hi, client brought in an SX-650 he acquired for cheap and said it was only working in mono. After a test it seems it is working in stereo on all inputs except FM. The Stereo light never comes on. I am good with Amps, pre-amps etc but not so much with FM. I washed the tuner board with ipa, and...
  24. Mark Blom

    Pioneer SX-838 No FM reception ?

    I have been going through many threads looking for information on this. I found one but it never said what the fix was. I have a Pioneer SX-838 that had a few issues I worked most of them out except one. The FM has static with the FM muting off but I get nothing at all in the way of stations...
  25. goldswimmerb

    Weird 2325 FM issue

    Hey guys, so I am working on a Marantz 2325 which is having a strange issue with the FM. Basically, the FM section takes time to warm up, when the unit is first turned on there is no sound, just a low rumble, about a minute later there is sound, but only FM mono and no signal meter deflecting...
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