Pulsating Noise Panasonic RC-6015

[Michaelkfl]

Hello, I have an RC-6015 that I am working on that is making a pulsating sound in-between stations. It sounds like a high pitched alien message, from high to low over and over again. When a station is selectrd the noise goes away. Any suggestions on what to test on this one?

[Michaelkfl]

Here is a YouTube video I made of the noise:

https://youtube.com/shorts/Nnxu2PwwPLc?si=oHrdg7ge2LPm_A2E

[gschmidt958]

Electrolytic capacitors in the audio or RF sections could be deteriorating, leading to instability. Look for indications of leaking or swelling at the top. Test them with a capacitance tester if you can.

[Michaelkfl]

Thank you very much! I will check the capacitors!

[Michaelkfl]

Problem solved. The pulsating was caused by a laptop power cord plugged into the power strip the clock was plugged into.