construction of dale hunt’s 80m ardf receiver · pdf fileconstruction of dale...
TRANSCRIPT
Construction of Dale Hunt’s 80m
ARDF Receiver Kit
Kevin Nichols, KA7OFR
Why 80m ARDF?
• No (well, much much less) reflections or
multipath
• Small antenna & receiver
• Simple to build as a kit
• Transmitters are small
• Fits well with Orienteering
Dale Hunt’s (WB6BYU) 80m
ARDF
• Fairly small, hand-held
80m (3.5MHz) ARDF
receiver
• Single stage direct
conversion type receiver
• Easy alignment
• Described in QST,
September 2005
• PCB available from FAR
Circuits
80m ARDF Kit Parts
PCB, Silk Screened
Some Helpful Items
Schematic - +5v Reg
Schematic – Audio Amp
+5v Regulator and Audio Amp
Schematic - VFO
VFO
Right on Frequency
Winding Torroid Transformer
PCB Almost Finished!
A Metal Case
Wooden Loop Antenna Holder
Schematic – Loop Antenna
Threading the Loop
Schematic – Sense Antenna
Sense Antenna
Sense Antenna
Wiring the Front Panel
Ready to Close ‘er Up
The Finished Product!