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

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

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.