One of our members had high noise on 144mhz SSB where it had not been detected before. After turning everything off in the Shack the noise was still there.
Then the Smart Speaker that was playing was turned off and the noise vanished. The culprit was not the speaker or its supplied power supply but an after market cradle that has a rechargeable battery so you can use the speaker without plugging in to the mains.
Anyway we did some tests at the Club on Tuesday and the Peak of the noise was 147mhz but so close to 2m it gave 4 to 5 s-points of noise on 144.300.
So if you have unexpected noise on 2m it may be wise to check your smart speakers too. Here’s the manufacturers details below.