[RFI] Noisey PSU (Laptop) on HF Decodeing

Thu May 31 14:47:51 EDT 2007

I have an IBM T42 now with an original IBM PSU that is clean absolutely but 
I had an IBM 600E previously that had a Targus aftermarket PSU that 
generated very strong QRM, as soon as I replaced that with an original IBM 
PSU it was clean.

Similarly replacing a (dead) original PSU in an IBM E-Pro desktop with a 
crap Powmax PSU generated all kinds of QRM, again replacing the Powmax with 
an IBM original cleaned everything up.

73,
Julio VE3FH

>From: "William Conlan" <w_conlan at eircom.net>
>To: <RFI at contesting.com>
>Subject: [RFI] Noisey PSU (Laptop) on HF Decodeing
>Date: Tue, 29 May 2007 20:29:18 +0100
>
>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.
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