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Author Topic: Monitor Interference on IC 7300  (Read 121 times)
KF7DS
Member

Posts: 249




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« on: Today at 06:26:16 PM »

All: Due to wind storm damage, I replaced a Mosley 20/15/10m dipole (TA31 Jr) with a Myantennas 40/20/15/10m ended.

The new endfed hears well and transmits well. But, on 20m, I now get interference on 20m on my IC 7300s spectrum scope that I did not get before...they are steady carrier looking vertical lines evenly spaced across the spectrum scope around every 20khz. I did not get this interference with the Mosley dipole.

As soon as I unplug the monitor from the MS Surface, the lines go away, so it definitely is the monitor.

Any ideas how to cure? Some ferries on the Power cord?

Don KF7DS
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W9IQ
Member

Posts: 1456




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« Reply #1 on: Today at 07:15:10 PM »

Most end fed antennas suffer from common mode currents on the feedline. On receive, this will cause the coax to pick up any local RFI. Add a counterpoise and a high quality chocking balun to your antenna to reduce the noise pickup.

- Glenn W9IQ
« Last Edit: Today at 07:18:33 PM by W9IQ » Logged

- Glenn W9IQ

I never make a mistake. I thought I did once but I was wrong.
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