[RFI] Noisey PSU (Laptop) on HF Decodeing

[k0occ at comcast.net]

I have an IBM laptop model T43 - Not a trace of RFI anywhere - Broadcast band, HF, or VHF.

--
Ernie, k0occ 
Atlanta, GA

-------------- Original message -------------- 
From: Fred Stevens K2FRD <k2frd at mac.com> 

> Yes. I have three laptops (old Dell Latitude 300, older Mac PowerBook 1400, 
> newer Mac iBook 900 [main computer]). All three are RFI noisy while listening on 
> HF when I have them plugged into commercial power. For this reason, I use them 
> on battery power only (lighter plug type DC to DC converters for all of them) 
> which cuts down, but doesn't eliminate the noise. If it gets too bad, I'll turn 
> them off. Exception: I use the Dell for digital comms, mostly PSK and it's the 
> quietest of the bunch. Most of my problems are likewise on HF and mostly on 20m 
> (of course, the most active daytime band). Drives me up the wall. 
> 
> 73 de Fred K2FRD 
> 
> At 8:29 PM +0100 29/5/07, William Conlan wrote: 
> >Hello guys, 
> >Has anyone experienced noise interference from Laptop PSU when listening 
> (decoding) HF Signals. 
> > 
> >Its not such a big problem on VHF/UHF for some reason. 
> > 
> >Many thanks in advance, 
> > 
> >Best Regards, 
> > 
> >Bill. 
> >_______________________________________________ 
> >RFI mailing list 
> >RFI at contesting.com 
> >http://lists.contesting.com/mailman/listinfo/rfi 
> 
> 
> -- 
> 73 de Fred Stevens K2FRD, VO2FS 
> http://homepage.mac.com/k2frd/K2FRD.html 
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