Has anyone tried one of these amps? I found one listed for $500 in my town and I absolutely love sunn amps, not so big on the inflated prices though..
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Show posts MenuQuote from: Enzo on April 11, 2021, 11:31:31 PM
"Dirt" in the jacks does not refer to visual grunge, it refers to electrical dirt. Contact surfaces oxidize or build up a film of foreign matter. This happens to ANY amp of ANY brand that has FX loop jacks.
You need to clean the cutout contacts, not just the parts a plug touches.
Quote from: DrGonz78 on April 11, 2021, 03:22:38 PMQuote from: Pepe on April 11, 2021, 12:49:21 PMI tried the cable jump method and it seems to work okay, channel a is good and channel b seems a little off but is doable. What causes this issue?
I assume this means you are placing a cable connecting the effects loop in and outs. Dirt, corrosion and worn out metal switching contacts are all possible reasons for the cutting out. But I don't see effects loop on the schematic so I am not sure if this is what you meant.
Yeah that's pretty much what I did
If the audio cuts out like clock work then it is always possible there is a cold solder joint. I would then input a test signal into the amp and when it cuts out I would scope or trace the signal in the amp. I would confirm preamp and power amp voltage while it is working and after it cuts out.
Quote from: Enzo on April 11, 2021, 05:25:38 PM
There should be an FX loop on the rear. Lower right corner. Just below the FS jack.
If patching a cord across the FX loop restores the sound, then your return jack needs service.