[TenTec] Switching noise

[Clark Savage Turner]

Aaron makes a good point, this happened to me.  I did not think the 
supply was generating any noise till I really tested with another 
receiver nearby, turned the transceiver connected to SPS on / off, and 
turned the SPS on / off.  I learned to identify the noises and now I 
wonder how many SPS's my neighbors have.  I hear lots of the SPS buzzing 
here and there at various signal levels.

Clark
WA3JPG

On Monday, March 10, 2003, at 02:41 PM, Hsu, Aaron wrote:

> I often hear from others that they don't hear the "hash" from the 
> switching
> power supply (SPS) they own.  In thinking about it, I remember that I 
> lived
> with switching noise for a couple of years not knowing that it was hash
> generated by the SPS that powered my laptop computer.  It was only one 
> day
> when I had the SPS unplugged from the wall that I notice the bands were
> quieter.  Living in the greater Los Angeles area, I had always 
> attributed
> the noise to atmospheric, industrial, or nearby CB sources when, in 
> fact, it
> was locally generated!  I now knew *exactly* what SPS hash sounded like 
> and
> how to ID a noisy power supply.