I have a power supply that I use to charge up batteries by way of an external charger. 120v input, 13.8 output. I noticed while it is on that a S3 noise will appear on my Yaesu FT-950 when it is on. I use the supply to run my Elecraft K1. It hasn't shown anything wrong while using the K1 but just happen to notice it being a S3 when the Yaesu is on.
Would this be the way the power supply is designed for to use as a battery charger power supply?
If the band is a little noisy, I don't notice it. If the band is quiet, then I notice the S meter reading.
Could this be maybe some bad filter capacitors?
The P/S is a high dollar item for the charger it is designed for.
I don't know if I am in the right place or not for this question but thought it would be appropriate for the QRP group.
The P/S is a Competition Electronics supply with quality looking parts inside. 3 toroid's with one being long on the output lines.
Am I being too worrysome about this or should I do a little more checking? As I stated, the supply powers the K1 ok with no trouble as I can tell. Being an S3, it is a little noisy.