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ampage archive
Vintage threads from the first ten years
Marshall amp problems
:
 12/30/1999 8:59 PM |
|
Jim Radmer |
Marshall amp problems I bought a 1984 Marshall 5210 50 W transistor combo for home practice use. It has an annoying noise that follows the master volume level up and down. It sounds like waves of water crashing to shore or a thunderstorm far away. Hard to explain, but it's a low frequency persistent noise that kind of "crackles" in the background. I have cleaned the pots and changed almost every electrolyt capacitor with no luck. Now I'm out of ideas. Perhaps the output transotors?? |
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| 12/31/1999 3:00 AM |
|
| franko |
i would check ALL the solder joints--there might be a loose one-- |
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| 1/3/2000 8:05 PM |
|
| Jim Radmer |
Re: (still) Marshall amp problems Hmm, I tried tapping the whole board with no luck. I changed most of the electrolytic caps with no result. The "lava boiling/constant crackle" sound follows (only) the master volume up and down. Could I search with a cold spray and/or a hair drier for bad connections inside components? |
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| 1/4/2000 5:54 PM |
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| Deltablues |
If the 5210 has the same design as the earlier 4210's, these are well known for developing broken solder joints on the volume and control pots since they soldered them directly to the pcb instead of using flying leads. If you've reflowed those joints you might consider swapping out the Master Vol. pot altogether... |
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| 1/5/2000 5:19 PM |
|
| Jim Radmer |
Re: noise sound online! You could be right, here's a sound clip of the noise: http://w1.1877.telia.com/~u187701009/lyd/5210.ra Jim |
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