#1
|
||||
|
||||
Creaking sound from stereo
Hi guys, haven't been on this forum in years. I have a late 60s/ early 70s Magnavox astrosonic stereo that has this sound out of the left speaker that is kind of like moving a creaky door really slow. Has worked fine for a long time, the sound just started. Any ideas?
__________________
Looking for zenith cobramatic parts -johnny the raster master! |
#2
|
||||
|
||||
Are the electrolytics original? Some of those caps prevent oscillation or cause it when bad.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#3
|
||||
|
||||
Im almost 100 percent sure they are. The sound corresponds with bass, whether from the record player or radio. It spends most of it's time sitting and was played a good chunk of this weekend. Usually on bad caps, I just get the typical death hum.
__________________
Looking for zenith cobramatic parts -johnny the raster master! |
#4
|
||||
|
||||
I'd bet on lytics too - maybe a "motorboat" oscillation when a push-pull stage draws increased current due to increased bass volume?
|
#5
|
||||
|
||||
Ill see if I can make a video of it sometime, then it may be easier to help diagnose, it has some pretty dirty controls, I may give it a shot, but it probably is caps.
__________________
Looking for zenith cobramatic parts -johnny the raster master! |
Audiokarma |
#6
|
||||
|
||||
https://www.youtube.com/watch?v=_XRP-GAcLwc
Here is the video, it went away overnight, and then came back after about an hour. Sounds like popcorn. Doesn't get louder with volume, but does become more rapid.
__________________
Looking for zenith cobramatic parts -johnny the raster master! |
#7
|
|||
|
|||
Definitely bad capacitors Johnny you may want to change those a full recap is in order
|
#8
|
||||
|
||||
After some diagnostics, turned out to be a capacitor on a small board for the output. Problem solved thank you all for your help.
__________________
Looking for zenith cobramatic parts -johnny the raster master! |
#9
|
|||
|
|||
Congratulations show me I'm fixing that I hope you enjoy your Magnavox I love that sound but Magnavox specially the tube type models solid state is okay but tubes are better going to stay in touch better
|
|
|