Modular Receiver for LF/VLF Bands

Larry Coyle, K1QW, published a 2-part article in QST (Nov & Dec 2008) that presents a high performance LF/VLF receiver design. The December portion of this article describes the use of a software defined radio I-Q detector module as part of the overall design. Larry gives a good high-level explanation of how the detector works, and also highlights the versatile DDS-60 that serves as the receiver's software-controlled VFO.