I’m liking my Samlex power supply, for the price it’s pretty compact and doesn’t have any noise I’ve been able to notice on my ic7300 compared to running on battery in the same location.
The one I have is below but I’m sure they have smaller ones too. Although the extra power is nice if you ever want to upgrade to a 100w rig or need to run a tuner off it.
Samlex SEC-1235M Desktop 30A Switching Power Supply, Advanced switch-mode technology, Reliable power with minimum weight and size, Circuit innovations minimize output voltage ripple and RFI https://www.amazon.com/dp/B006ZZ1VH0/ref=cm_sw_r_cp_api_glt_fabc_XTH5KMYC1T2TF8SFHMXS
I have a Samlex SEC-1235M Desktop 30A Switching Power Supply
This is a switching supply, but it's quiet as a mouse. I have it right next to my '7300 and can hear no noise at all from it. No dip in voltage with even with the 7300 pumping out RTTY at full power. About $146.00 from Amazon or $120 from HRO. Yep, HRO is less expensive!