[RFI] Common mode

Tim Duffy Tim Duffy <tduffy@sygnet.com>
Sat, 20 Nov 1999 13:24:02 -0500

------- Forwarded Message Follows -------
From:          Self <Single-user mode>
To:            rfi@contesting.com
Subject:       Common mode
Reply-to:      ea5rs@arrakis.es
Date:          Thu, 18 Nov 1999 16:44:38

Can anyone provide a model of how common-mode signals enter and are
amplified on a radio receiver via the coax shield of the antenna?

This seems to be the entry mode of a VY STRONG BCI in a 
contest-station. 50+ dB notch filters on the BC frequency 
(differential mode filters) have proved useless.

BC has 10kW out on 1584 KHz and antenna is only 100m away from 160m 
amateur antenna.

Thanks in advance.
Juan, EA5RS

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