53A pwr supply for cb or ham radio?

[bharvey2]

I've been using a switching power supply for a few years, powering multiple radios simultaneously, without any discernible problem. The brand however is different. I have a Nemic Lamda. It also has a cooling fan that my older, linear supply did not. While I would prefer the quieter fanless design, I got used to it. As other have mentioned, make sure you fuse it. I installed overload protection on both the input and output and I made a cover to protect the terminals from coming into contact with unwanted objects, I also adjusted it to 13.8VDC.
It sounds like the price is right so giving it a test run shouldn't hurt anything.

 

[toastycookies]

here's some more info on the PSU

 

[Blackswan73]

Here is the one I have, $25 shipped. Not a bad price for a 30 amp supply. Mine is about the size of a carton of cigarettes, and weighs about 2 pounds. Major difference between it and my Pyramid, which can cause a hernia if you pick it up lol

 

[krokus]

I have repaired a few of their supplies, and do not recall anything to be wary of.

Using a metal enclosure could be useful: allowing a detachable power cord to be used, adding a cooling fan possibility, and some RFI protection.
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[BrettL]

It just seems the physical characteristics of these switching power supplies are a not enough. Seems like it would have a lot more heat sink to dissipate heat and be more efficient.

I seen a guy once at a ham meet and he looked at a big power supply the size of a desktop pc tower rated at only 10a and he spoke loudly " wow, look at that thing it's a monster, how much you take for that". I guess it was the physical appearance that reeled him in. I would not carry that 40 lbs back to my truck for just 10a.

I still have a micronta power supply from radio shack brand new still in it's box from 1976. This is 3 years before my time and that 1.75A 13.8v unit is bigger than these modern power supplies and is for the much smaller things.

 

[prcguy]

79 to 82% looks plenty efficient and the cooling is probably just fine. I have a 1,600w switching supply that's not much bigger but its efficiency is in the 90% range.

They recommend an EMI/EMC filter so its probably makes a lot of noise in the HF bands.
prcguy

It just seems the physical characteristics of these switching power supplies are a not enough. Seems like it would have a lot more heat sink to dissipate heat and be more efficient.

I seen a guy once at a ham meet and he looked at a big power supply the size of a desktop pc tower rated at only 10a and he spoke loudly " wow, look at that thing it's a monster, how much you take for that". I guess it was the physical appearance that reeled him in. I would not carry that 40 lbs back to my truck for just 10a.

I still have a micronta power supply from radio shack brand new still in it's box from 1976. This is 3 years before my time and that 1.75A 13.8v unit is bigger than these modern power supplies and is for the much smaller things.