One week (exact) after installation, this station lost nearly 3 dB in daytime reduction and nearly 6 dB in nighttime reduction - AFTER I removed the filter in order to test its ability to suppress interference from a badly designed video adapter toward the short antenna, the reinstalled filter onto the long rod an hour later. Message rate took a corresponding dive. I cannot find any plausible cause. (Tried to resecure connections, and all.)
