Internal Antenna Tuner Model JT-11

Automatic internal antenna tuner for the Jupiter Model 538 transceiver. Manufactured by LDG Electronics but offered by Ten-Tec and LDG.

• Archived Ten-Tec Web Page
• Product Manual from LDG Electronics

• CONFIGURATION: Switched "L" network
• INDUCTOR RANGE: 20 uH
• CAPACITOR RANGE: 3900 pF
• TUNING TIME: 0.1 to 5 seconds, 3 seconds average
• FREQUENCY COVERAGE: 1.8 to 30 MHz
• TUNABLE LOAD RANGE: 6 to 800 ohms (10:1 SWR)
• POWER RANGE: 5 to 150 watts. Jupiter max output power is 100 watts.

Approximately 15 watts minimum is necessary for the tuner to go into operation. For QRP power level operation, after antenna tune at 15 watts, transmitter power may be reduced to below 15 watts for QRP operation.