[Elecraft] Switching supplies and the K3
Trevor Smithers
tsmithers at cix.co.uk
Tue Jul 8 09:38:00 EDT 2008
I have a GSV3000 as well and can confirm the lack of rfi. In my opinion switch mode
supplies have no place anywhere near the ham shack - its bad enough the neighbours
having them all over the place but they don't know or care - we should know better.
As an aside if anyone has any doubts about whether or not switch mode supplies cause
rfi get one of these devices and check it
http://www.winradio.co.uk/home/erd.htm
I got one some years ago after a tip on the FlexRadio list and its been extremely useful in
tracking down sources of interference - just hold it near to a wall wart supply, or usb
cable for instance and be astonished with the amount to radiation being generated. The
rfi being produced might not be falling directly within the hf ham bands, but, its
unwanted radiation nonetheless and is not something you want in or around the shack.
73 to all
Trevor G0KTN
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