The LDG Z-100 Automatic Antenna Tuner Manual provides installation, operation, specifications, and troubleshooting instructions.
The LDG Z-100 Automatic Antenna Tuner is a microprocessor‑controlled device that automatically matches antennas from 6 Ω to 800 Ω across the HF band (1.8–54 MHz). This manual explains how to install, power, and operate the tuner safely.
It covers jump‑start procedures, memory tuning, full tuning cycles, installation guidelines, grounding recommendations, and troubleshooting tips, plus technical specifications and support information.
| Antenna impedance | 6 to 800 Ω (≈10:1 SWR, 3:1 on 6 m) |
|---|---|
| Frequency coverage | 1.8 to 54 MHz |
| Power range | 0.1 – 125 W (50 W on 6 m) |
| DC power requirement | 7–18 V DC @ 300 mA during tune |
| Memory capacity | 200 tune memories |
| Tuning time | 1 to 6 s (average 3 s) |
| Enclosure size | 5" × 5" × 1.5" |
| Weight | 14 oz |
Connect the tuner to a 7–18 V DC source that can supply 300 mA via the 2.5 × 5.5 mm power jack; two 9‑V batteries in series can also be used.
Press and hold the Tune button for 0.5–3 seconds; the red LED lights and the tuner restores the stored setting for that frequency.
The Z‑100 is rated for up to 125 W continuous input, with a 50 W limit on the 6 m band.
The tuner stores 200 tune memories for instant recall of previously tuned frequencies.