HF Antenna : 4el. Inverted V Parallel Dipole @ 35m (40+20+17+15+10) V/U Antenna : Diamond X30 @ 35m Receiver is a RTL-V4. Currently switching between HF and V/U bands. If you can't see any signals on HF most likely the receiver is switched to V/U. Occasionally the system might be off or switched to LW/MW and bandpass filtered so no signals are visible on the upper bands. Evening hours generally present a considerable amount of QRM. Online SDR will be disconnected if the station is operating on TX.