23 Nov
2013
23 Nov
'13
12:51 a.m.
Stefan and Mark, 90% of the "crud" on 2 metres comes from my Cable Modem / Router. Lucky so far Funcube and N3XT are in the clear. Colin VK5HI.
Hi all,
Replace the switch mode wall mount power supply with transformer power supply and coil the extra power cord with ferrite. Most of the common mode noise can be eliminated. There are still switch mode regulators and oscillators inside modem/router/hub that can radiate birdies. Clamp the Ethernet cables also with a ferrite clamp so there is no more "antennas".
-jari oh3uw