Topband: AM interference on 1840,
radioconnection at gmail.com
Mon May 20 15:22:57 EDT 2019
If the problem is related to receiver overload, than a trap at the BCB's
operating frequency will correct the problem. Unless the problem is
related to a non-linear junction (rusty fence wire, etc.) generating local
IMD or harmonically related signals due to rectification.
If the problem is the actual presence of a harmonic radiating from the BCB
transmitter, than no amount of filtering at the ham's location will cure
the problem. Using a receive filter on 1860 will attenuate both the
harmonic signal and desired amateur signals.
There can be advantages to having a high pass filter that limits BCB signal
levels, but it will not cure this problem.
The traps belong at BCB transmitter site if it is a real harmonic..
If I had this problem I would explore using a noise cancelling system (MFJ
or one of the Russian eBay
kits) to try and null the direction the signal is coming
More information about the Topband