XPost: alt.home.repair, sci.electronics.design   
   From: '''newspam'''@nonad.co.uk   
      
   On 27/05/2023 22:39, micky wrote:   
   > All my tv's run off a central location, which used to include cable but   
   > now has a DVDR with an amplified antenna that brings in my city and the   
   > next one.   
   >   
   > One tv is supplied a signal through a splitter/amp and a cable, and the   
   > sound is fine.   
   >   
   > The kitchen tv has lately developed bad sound.  Words are intelligible   
   > but sort of staticy or distorted.  Sometimes it's worse than others.   
   > Its signal is supplied through the same splitter/amp, another splitter,   
   > another splitter/amp, and a long cable,   
   >   
   > If  you were a betting man, where would the most likely problem be, in   
   > the kitchen TV (which is 20 or so years old), the cable, or that second   
   > amp, which has been sitting on the basement floor and running   
   > constantly, needing no attention, for 39 years?   
      
   I find it hard to believe that a 20 year old TV will work at all on   
   modern digital TV signals without a set top box interposed somewhere.   
      
   My money for distorted audio would be on the audio amplifier circuit in   
   the set. Electrolytic capacitors seldom last more than a couple of   
   decades without degrading to some extent.   
      
   Signal related problems on digital are generally of the all or nothing   
   type due to the error correction and the image usually breaks up first.   
   Audio tends to get short gaps in and/or ultrasonic clicks depending on   
   the sophistication of the decoder (better ones mute bad blocks, crude   
   ones generate intense high frequency pulses instead).   
      
   --   
   Martin Brown   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)