The ASB Avionics Integral Dorsal HF Shunt Antenna replaces the existing dorsal fin leading edge with an internally mounted HF antenna composite dorsal fin. Available for the Lockheed L-382/C-130 Hercules and P3 Orion, Boeing 707, C/KC135, 737, and 747 classic. Click below to download further information about ASB Avionics Integral Dorsal HF Shunt Antennas.