Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

donate to eham
   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: I found a "quiet" Computer PSU...by accident.  (Read 111 times)
KM4JOJ
Member

Posts: 59




Ignore
« on: May 02, 2016, 09:26:08 AM »

[For those who don't want to read the associated story...and want the TL;DR (too long;didn't read) version. I've found that the Cooler Master Elite 550 (Ver 2) power supply...at least in my PC...does not produce disgusting EMI and the radio is dead quiet with it running.]

Greetings fellow hams,


Just thought I'd share this since it is slightly RFI related. For the last 8 years..I've been a laptop user; I abandoned desktops when I found these nice little slabs of technology could do everything my outdated desktops had been doing...even better when i got a "brand new" gaming one. Things were great till I picked up an RTL-SDR as a pre-cursor to my becomming a HAM...it's power brick was extremely noisy. Plug the thing in...and noise everywhere. This was the original OEM brick to the laptop...not a chinese relplacement. It was really noisy; though I assumed after 4 to 5 years of use...that was par for the course. This lead me to laptop #2...a unit I inherited under sad circumstances. When I had it plugged in to the wall...nothing. No noise...no interference...I thought I'd hit a gold mine! I quickly made that my radio laptop...it basically only got used specifically for radio stuff. This means I had to switch computers when I wanted to do ham stuff; it got a little annoying after a while and I found myself just not doing radio. Not to mention I'd gone back to work...so I had other hobbies that took my money I began taking up.

One of the things I brought home from work one day was the boss' old computer; some HP desktop with an AMD Athlon II x4 620 CPU. With an integrated GeForce 9100 on the Nvidia chipset attached to a Paragon (Asus) board; this thing had six gigs of ram and a 10/100 network card that was 5 years too old. So what do I do? I start looking at what I can throw in there to upgrade it.  I wound up building a "low-end gaming" machine by sticking a modern GeForce GTX760 video card in it. This of course requires a power supply upgrade...which I didn't realize (hey....8 years since touching a desktop pc...things change). So..I bought a cheap one; it was DOA. I couldn't afford the "good ones"...so I exchanged it and went for something that at least felt a little better...a Cooler Master Elite 550. I assumed...that a power supply in this price class...even with the FCC logo on it...would produce enough EMI/RFI that my radio would be 100% useless with the desktop turned on. There's a laptop brick that if you plug it up anywhere in the house...it'll interfere with the radio. I held no hope that this desktop...practically sitting next to my radio..would somehow throw out no RFI to screw with it.

I........was wrong. I did not flip the radio on while the desktop was powered off; but when I flipped it on...I heard no more noise than I remember hearing with nothing running in the shack. Last night I hooked the interface up...installed the usb->serial drivers required for my dongle; and FLDigi was decoding things with no issue. Sent a few signals to a friend...and everything worked.

It feels nice knowing I have *one* main PC that I can go between gaming, music, and ham stuff without having to stop, disconnect a laptop, hook another up, boot it up, and all that.

So...I've had success with the Cooler Master Elite 550 not causing RFI in case anyone is in the market for a computer power supply.

Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!