Good to know, thanks for the info. I'm using an Astron linear supply 35amp adj with meters for the last 20 years. I tried an MFJ 75 amp to run a Hercules amp, but had birdies all up and down the band. MFJ sold it as quiet, but offered no defense or remedies when I asked to return it. I ended up with a sealed battery and an Astron as a charger which worked fine.
I'm using a ZW-R with Lionel Meter on it and four PSX-1AC fast breakers mounted on a board for my lighting, switches, and accessories.