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JTM45 vs Idiot

Discussion in 'The Workbench' started by _Steve, Jun 9, 2021.

  1. Chris-in-LA

    Chris-in-LA Well-Known Member

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    Yes, sir. Great! I’ve had a few cold solder joints in socket pins and other spots, too. For my builds, that’s usually the issue.
     
    Last edited: Jun 12, 2021
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  2. Chris-in-LA

    Chris-in-LA Well-Known Member

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    Oh, BTW, how’s that amp sounding now?
     
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  3. _Steve

    _Steve Well-Known Member

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    I had to leave for the weekend before I got a chance to take it upstairs and play it unfortunately :( Will try on Monday and report :)
     
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  4. JeffMcLeod

    JeffMcLeod Well-Known Member Gold Supporting Member

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    So Idiot: 1, JTM45: 0? lol
     
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  5. _Steve

    _Steve Well-Known Member

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    LOL. No I think the amp won that one. It was on and off the bench for over a month!
     
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  6. JeffMcLeod

    JeffMcLeod Well-Known Member Gold Supporting Member

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    Ok. Sounds like you finally won in overtime though.
     
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  7. william vogel

    william vogel Well-Known Member Gold Supporting Member

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    From the pictures, I recommend that you melt a good bit more solder into your joints. Do you buy solder by the 1/2 lb or 1 lb roll? If not, buy a roll. And I’m not saying to glob it up, but it’s the purpose of the solder to weld the connections solid. The components on the board are okay but I prefer a little bit more, the wires appear to be “lightly tacked” and this proved to be a problem here and will definitely become a full blown problem as the amp ages.
     
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  8. myersbw

    myersbw Well-Known Member

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    I had a Bad Cat Classic Deluxe once. Worked fine...traded it (fortunately to a good friend). He played it and within 10 min the amp cut out. I peeked at it and thought I'd found some oxidation problem causing the issue...sent it back...SAME problem! It came back. All voltages looked good...no failure "on the bench" at any level (was using an external cab). So...I poked every wire with my nylon adjustment tool. FINALLY found the guilty party...and...it pulled right out! (B+ wire!). It was factory oversight...no solder on the wire at all. It had been inserted and bent sideways on the terminal strip solder tab....never soldered. Never had a Bad Cat in before or since with an issue like that. Glad you found the problem!

    Also, if you reflow a lot of turrets...as they take a bit of heat, keep an aluminum alligator clip heat sink and clip it on any small signal caps connected to avoid excessive heat. It's just good practice. And, congrats on the fix! :)
     
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  9. neikeel

    neikeel Well-Known Member

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    I like the croc clip heat sink too (saves overheating components).
     

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