• Document: This presentation will cover T- Hunting and ARDF. In this talk we will discuss : The equipment The competition The strategy Other uses for DF
  • Size: 5.43 MB
  • Uploaded: 2019-02-13 18:01:25
  • Status: Successfully converted


Some snippets from your converted document:

This presentation will cover 
 T- Hunting and ARDF • In this talk we will discuss : • The equipment • The competition • The strategy • Other uses for DF • Types of Transmitter Hunting: • Car Hunts or "T-Hunting" • One Transmitter • Judged by mileage • Done from automobiles • On foot hunts or "ARDF" • Several (usually 5) transmitters • Judged by time and score • Done on foot ARDF / T-Hunt Equipment • Equipment for the Hunter • Basic Configuration • Home built • Commercial • Let’s get fancy • Equipment for the Hunt Master • Basic Configurations • Equipment suggestions • ARDF Specific equipment ARDF / T-Hunt Equipment 
 Equipment for the Hunter Basic Configuration Directional Antenna Attenuator Receiver ARDF / T-Hunt Equipment 
 Equipment for the Hunter Antenna Considerations • 2 meter • Good front to back ratio • 2-5 element “beam” antennas are typical • Flexible elements a plus • Light weight and rugged • 3rd and 5th harmonic antennas useful in T- hunting but less practical for ARDF • 80 meter • Loop antennas are typical ARDF / T-Hunt Equipment 
 Equipment for the Hunter Antenna Sources • Commercial 2 Meter • Arrow (T-hunting) • UHF Arrow antenna good for 3rd harmonic sniffing • Commercial 80 Meter • Typically integrated into receiver ARDF / T-Hunt Equipment 
 Equipment for the Hunter Antenna Sources • Home Made 2 Meter • Tape Measure popular for ARDF & T-hunting • Home Made 80 Meter • Typically integrated into receiver ARDF / T-Hunt Equipment 
 Equipment for the Hunter Ron Graham receiver and antenna ARDF / T-Hunt Equipment 
 Equipment for the Hunter Tape Measure antenna ARDF / T-Hunt Equipment 
 Equipment for the Hunter A typical loop antenna ARDF / T-Hunt Equipment 
 Equipment for the Hunter Attenuator Considerations • Variable attenuation (~0 to 120 db) important • Integrating antenna & attenuator is popular • Passive attenuators tend to be ineffective at close range • Active attenuators good to a few feet • Active Attenuator / field strength meter combo is ideal • “Body Nulling” and working harmonics (with and without antenna) can be quite effective • 80 meter receivers generally have integrated attenuators ARDF / T-Hunt Equipment 
 Equipment for the Hunter Attenuator Sources • Commercial Passive • Arrow antenna, surplus stores, Ebay, etc. • Home Made Passive and Active • The Internet is full of projects. ARDF / T-Hunt Equipment 
 Equipment for the Hunter Offset Attenuator ARDF / T-Hunt Equipment 
 Equipment for the Hunter One of many ways to implement an offset attenuator ARDF / T-Hunt Equipment 
 Equipment for the Hunter One of many ways to implement an offset attenuator ARDF / T-Hunt Equipment 
 Equipment for the Hunter Passive Attenuators ARDF / T-Hunt Equipment 
 Equipment for the Hunter The body null - Equipment you already have ARDF / T-Hunt Equipment 
 Equipment for the Hunter • 2 Meter Receiver Considerations • HTs and scanners work well • Receivers with built in attenuation are best • Wide receive range allows for working harmonics 145.565MHz *3 = 436.695 MHz • S meter and earphone jack useful • 80 Meter Receiver Considerations • Receivers designed for ARDF are the only practical choice ARDF / T-Hunt Equipment 
 Equipment for the Hunter • Receiver Sources • Commercial 80 Meter • Equipment is available from Europe Asia • Home Made 80 meter • Jerry Boyd’s (WB8WFK) Fox Finder 80 • Dale Hunt’s (WB6BYU) R2-80 Receiver ARDF / T-Hunt Equipment 
 Equipment for the Hunter A modified Ron Graham Receiver Original receiver ARDF / T-Hunt Equipment 
 Equipment for the Hunter Fox Finder 80 R2-80 Receiver ARDF / T-Hunt Equipment 
 Equipment for the Hunter Let’s Get Fancy (primarily

Recently converted files (publicly available):