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  #11  
Old 16th January 2023, 03:51 PM
Richard Richard is offline
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Default Re: KECL82 debugging

Hi,

Yes on a tag board construction I would agree but (and I'm not meaning to be contrary) after a good look around and meter for anything obvious, I'd change all the capacitors in one go.

They cost little, are 20 years old, and the pcb will need to come out so it doesn't make sense to change parts one at a time imho.

Whilst the pcb is out have a good check and re-make any suspicious joints or discoloured resistors, remove to meter any that look bad and hope you've hit the problem when it goes back in. If not you'l have eliminated the most likely components and done a job that needs doing at this age anyway.

Attached is a pic and parts list from the old website. I have the circuit if you need it but not the build text
Attached Images
File Type: jpg KECL82.jpg (73.4 KB, 25 views)
Attached Files
File Type: pdf KECL82 Parts List.pdf (18.7 KB, 16 views)
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  #12  
Old 16th January 2023, 05:33 PM
John Caswell John Caswell is offline
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Default Re: KECL82 debugging

Here Richard and I must disagree.
Because, with the exception of C6/7, all the other capacitors are in parallel with a resistor, it is pretty easy to tack solder a new capacitor across that associated resistor. Try it and see.

John
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  #13  
Old 17th January 2023, 03:15 PM
Richard Richard is offline
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Default Re: KECL82 debugging

Hi John. Yes you could, but no problem, just a different point of view given that these caps are all old

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