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Troubleshooting static/crackling noise on power up and power down only

I am using a CAT Ult MK2 pre and a CAT JL2 amp. Just today, one channel is crackling and popping on power up and down only. I suspect it is the amp. I pulled the input tube (on the amp)on the channel in question and checked it for noise on my VTV tube characterizer/tester. It is quiet. The system is dead quiet during play or idle. The noise is only there when turning the amp on (last component in chain to power up) and powering down the amp(first component in chain to power down). Any suggestion or trouble shooting ideas to isolate the problem are appreciated.

Bart


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Topic - Troubleshooting static/crackling noise on power up and power down only - posbwp55@msn.com 11:06:50 05/5/07 (4)

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