Click on link below to download: https://www.astronomy.me.uk/wp-content/uploads/2026/03/John-Berman-SID-Presentation-BAA-VLF-Meeting-160326.pdf Post navigation Sketch a practical 20 kHz tuning arrangement (variometer vs switched L/C vs active front-end) tailored to radio astronomy How far can VLF signals be detected under Polar ice caps?