PS-100 sparkling noise

Stage & Studio
1

I bought my PS-100 about 10m ago and it has some sparkling noise (see video https://youtube.com/shorts/Amsi8S9-Eec?si=lOPgmPrOHEIrLmDK)

I replaced the phase invertor within success and went back to the original one.
As you can see, the noise is coming from the PS100 even without the amp being in standby position. Any touch on the PS100 make it noisy.

Any idea where this is coming from ? What should I do ?
As tubes are quite expensive I am not going to buy some new « just to test » without the guarantee that it will fix it.

Thank you for your support.
Michael

2

Hi Mick,

This looks like microphonic tubes to me. When you tap the case, vibration is getting transfers to the electrodes in the tubes.

Regards

Dan