Also, There are reports that the meter illumination in the SS-25M causing noise spikes. This web page might be of some interest. http://www.madpower.com/jk/Hamradio/astron/
Get a stock of Mix-31 split beads etc as you may need to bypass the AC line or DC leads.
I have a Yaesu charger for HT that puts out hash when the device is fully charged.
Went thru this exercise and found a lot of stuff in the house that causes hash.
If anyone is interested I'll give a summary.
I found it handy to be up at 03:00AM when the RFI from outside the house was minimal.
I had heard of the Astron switchers being noisy.
I recommend the Alinco DM-330MV switching power supply. I personally have 3 of tem & one has been in nearly continuous use for over 10 years. Also, our club has 3 in the club station. Nary a peep out of any of them.
73, Ray, K9DUR
It's BY FAR the quietest Switcher out of about every brand out there, the next one which isn't real bad on the HAM bands is the Samlex 30 Amp supply but it is noisy on the BC and LF bands.
??? on shipping cost.