Topband: QRM Eliminator

Roger Kennedy roger at wessexproductions.co.uk
Mon Oct 10 13:41:49 EDT 2022


This circuit is clearly MUCH simpler than the MFJ units, which uses matching
transformers and has several extra stages.

Personally, I would find it annoying that the gain isn't unity through the
unit. 

ALSO - I bought a secondhand MFJ-1025 for about $70 . . . but found that I
needed to add a 2-stage preamp for the Noise antenna (which the 1026 has) -
but this is easy as the 1025 uses the same PCB as the 1026, so I just built
it onto the pcb, using MFJ's design.

Roger G3YRO




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