Argonaut Model 509

• Five bands, 3.5 - 30 MHz
• SSB & CW modes
• Fully solid state
• Permeability tuning
• Instant break-in
• Instant band change
• Built-in SWR bridge
• S-Meter
• WWV
• Internal speaker
• Direct frequency readout
• Receiver offset tuning
• Five watts input
• Automatic sideband selection
• Plug-in circuit boards
• 1/2 uV receiver sensitivity
• 12 - 14 VDC or AC pack power
• Size: HWD 4.5" x 13" x 7"
• Weight: 6 lbs

• VE3AB's Argonaut Pages
• WD8RIF's Argonaut 509 Page

Video of 509 with Internal Digital Readout

• Add 30m Mod
• Dial String Replacement Alternative
• Adding a Crystal Filter
• Cleaner Keying for the Ten-Tec 509 by W1HUE
• Improving SSB Performance of the Ten-Tec Argonaut 509 by W1HUE
• Curing VHF Interference in Ten-Tec Argonauts by W1HUE

• Antenna Tuner Model 205
• 100 kHz Crystal Calibrator Model 206
• CW Filter Model 208
• One Ampere Power Supply Model 210
• Ceramic Microphone Model 215P
• Keyer Model KR5A

• The Odyssey of the Argonauts

• Sensitivity: Less than 0.5 uV for 10 db signal-plus-noise-to noise ratio.
• Selectivity: 2.4 kHz at 6 db down. 1.7:1 shape factor 6/50 db.
• Input: Low impedance unbalanced coaxial input.
• Output Impedance: 8 ohm speaker or headphones. (High or low impedance headphones can be used.)
• Spurious Response: More than 50 db down.
• Automatic Gain Control: (Max) For 100 db change in input signal level, output changes less than 6 db.
• Offset Tuning: With pull-out defeat switch.

• DC Power Input: 5 watts PEP; 5 watts CW.
• RF Power Output: 2 watts (50 ohm non-reactive load), miniumu.
• Output Impedance: 50 to 75 ohms.
• Transmit-Receive Operation: SSB: PTT. CW: Complete break-in.
• CW Sidetone: Internally switched. Operates in CW mode.
• Microphone Input: High impedance. Crystal, ceramic, or dynamic.
• Carrier Suppression: 40 db from single tone output.
• Sideband Suppression: 30 db down from a single tone output at 1000 Hz reference.

• Frequency Coverage: 3.5 to 4.0, 7.0 to 7.5, 14.0 to 14.5, 21.0 to 21.5, 28.0 to 30.0 MHz.
• Frequency Stability: Less than 100 Hz change from 10.5 to 14 VDC.
• Modes of Operation: Normal sideband, reverse sideband, CW.
• Dial Calibration: +/- 5 kHz on 80 through 15 meters, +/- 10 kHz on 10 meters.
• Tuning Rate: Approximately 25 kHz per knob revolution, 80 meters through 15 meters. 100 kHz on 10 meters.
• Front Panel Controls: Resonate. Offset (pull-off). Band Selector. Tuning Knob. RF Gain. AF Gain/Power On-Off. Mode Switch. Meter Switch. Drive.
• Rear Apron Connectors: Antenna. Dial light switch. Microphone jack. Headphone/speaker jack. Receiver antenna. Auxilliary 12 V output jack. Key jack. Power in jack. Receive/Transmit antenna switch. Accessories socket.
• Semiconductor Devices: 32 Transistors, 3 Mosfets, 3 I.C.'s, and 18 Diodes.