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   sci.electronics.repair      Fixing electronic equipment      124,944 messages   

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   Message 124,810 of 124,944   
   legg to cd6699@notformail.com   
   Re: Blown Resistor?   
   25 Nov 25 11:43:50   
   
   From: legg@nospam.magma.ca   
      
   On Sun, 23 Nov 2025 22:58:42 +0000, Cursitor Doom   
    wrote:   
      
   >I've been trying to trace an issue with a Uher tape deck in respect of   
   >extremely  low audio gain during recording. I was delighted when I   
   >spotted a resistor in the AGC section with a tiny blow-hole half way   
   >down its body. I was able to confirm this when I removed it for   
   >examination under a stereoscope. There was even a bulge under the hole   
   >where some pressure had clearly built-up immediately prior to the   
   >blow.'Easy fix!' I thought; 5 minutes and it's done. However, I was   
   >baffled when it tested spot-on its 1200 intended ohms! WTF?? Something   
   >must have pulled excess current through that component and the obvious   
   >culprit was the BJT it was the series resistor for. However, once   
   >again, it tested fine! I just never have encountered an outcome like   
   >that before. Anyone had similar?   
   >   
   >CD   
      
   Mfring defect in the epoxy 'paint' finish.   
      
   RL   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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