LDG Automatic antenna tuners

• LDG Z-817 Automatic Tuner
• LDG IT-100/YT-100 Automatic Tuner
• LDG Z-11Pro II Automatic Tuner
• LDG AT-100Pro II/AT-200Pro Automatic Tuner
• LDG AT-600Pro Automatic Tuner New
• LDG Z-100Plus Automatic Tuner
• LDG AT-897Plus Automatic Tuner
• LDG AT-1000Pro Automatic Tuner



• LDG Tuner Comparision Table

Z-817 Automatic Antenna Tuner

Z-817 Tuner (FT-817 not included)

Z-817 Tuner Rear (FT-817 not included)

The Z-817 is the ultimate autotuner for QRP radios including the Yaesu FT-817(D). The Z-817 interfaces to the CAT port (ACC) on the back of the FT-817 radio with the provided cable. Tuning could not be simpler; one button push on the tuner is all that is needed and the Z-817 takes care of the rest. It will switch to PKT mode, transmit a carrier, tune the tuner, then restore the radio to the previous mode! 2000 memories cover 160 through 6 meters.

Of course, the Z-817 will also function as a general purpose antenna tuner with other QRP radios. Just transmit a carrier and press the tune button on the tuner. The Z-817 is powered by four AA internal Alkaline batteries (not included), so there are no additional cables required to use the Z-817. A coax jumper cable is also included for fast hook up. Latching relays are used so that power consumption is Zero when not tuning allowing a set of batteries to last about one year.

Technical Data LDG Z-817

• RF Power 0.1 to 20 watts SSB, CW and digital modes.
• Latching relays for ultra low power consumption
• Battery operated 4 x 1.5V Alkaline AA (not included)
• Built-in CAT port interface. CAT thru port for computer connection.
• 2000 memories when used with FT-817 interface (200 memories for other radios)
• 1.8 to 54 MHz coverage
• Tunes 6 to 600 Ω (about 10:1 SWR range). 16 to 150Ω on 6m (about 3:1)
• SO-239 in and out connections for dipoles, verticals, beams, G5RV, OCF, Cobra, ect.
• Dimensions: 120 x 43 x 130 (WHD). Weight: approx. 300g (without batteries).

Included in shipment is one CAT cable (30cm) and one coax cable (30cm).

Suitable batteries: Ansmann maxE rechargeable batteries! 2100mAh capacity, very low self-discharge. Comes fully charged, ready for immediate use.

LDG IT-100 Automatic antenna tuner for IC-7000 / IC-706 etc.

LDG YT-100 Automatic antenna tuner for FT-100/FT-857/FT-897.

LDG IT-100

The operation of the tuner is done very conveniently by the push button on the tuner, with the IT-100 alternatively by the "Tune" button on the radio. A longer push starts a new tuning cycle, a short push switches to "bypass". With 2000 memories the tuners find once tuned frequencies very fast, for new frequencies the tuning takes max. 6 seconds. The tuners match a SWR from 10:1 (3:1 on 6m) and therefore a much wider tuning range than many other tuners. Two LEDs show the "SWR too high" error and the tuning process.

Both devices are connected with supplied with cable (35cm long) to the CAT (Yaesu) or Tuner (Icom) socket of the radio, which also supplies them with power. This reduces the required cabling to an absolute minimum. A coaxial cable to connect tuner and radio is also supplied (35cm long).

LDG YT-100

The IT-100 tuner is the successor to the AT-7000, which is not available anymore. It does not only support the IC-7000, but all Ico mradios with a 4-pin tuner socket (i.e. IC-706Mk2G, IC-718, IC-746, IC-7400, IC-756Pro3 etc.). The size of the tuner is 17x17x4cm, the weight is 750g.
The YT-100 is intended for use with the Yaesu FT-100, FT-857 and FT-897. The tuner has a size of 20x9x4.6cm and has a free CAT socket on the rear, allowing you to connect radio and computer at the same time.

Further technical details:

• Frequency range 1.8 to 54.0 MHz
• 0,1 to 125 Watt (SSB und CW), 100W on 6m
• Tuning time between 0.1 and 6 seconds for new frequencies, ca. 0.1 sec when tuning from memory
• Tuning range 4 to 800 Ω (16 to 150 Ohm on 6m), 4 to 3200 Ω with optional 4:1 balun
• Tunes any kind of coax-fed antennas: Dipoles, Verticals, Beams etc.
• Optional external balun enables you to tune random wires, long wires or twin ladder fed antennas
• Control and coaxial cable (35cm) included

LDG IT-100 Rear

Z-11Pro-II Antenna Tuner

• 0.1 to 125 watt power range (SSB and CW), 100W on 6M
• Easy to read LED display for SWR and status
• 8000 3-D memories for instantaneous band changing
• Tuning time: 0.1 to 6 seconds full tune, 0.1 seconds memory tune
• Selectable user parameters: Auto/Semi, threshold, and more
• 1.8 to 54.0 MHz coverage. Built-in frequency sensor
• Tunes 6 to 1000 Ω loads (16 to 150 on 6M), 6 to 4000 Ω with optional 4:1 Balun
• For Dipoles, Verticals, Vs, Beams or and Coax Fed Antenna
• Optional external Balun allows tuning of random length, long wire or ladder line fed antennas
• Optional interfaces for Icom, Alinco, Kenwood and Yaesu available
• Power requirements: 8 to 16 volts DC at 300 mA Max. 25 uA standby current
• User installable battery holder (not supplied)
• Small Size Enclosure: 7.7” x 5.0” x 1.5”. Weight: 1.5 pounds

The Z-11Pro-II uses LDG’s state-of-the-art processor-controlled Switched-L tuning network. It will match dipoles, verticals, inverted-Vs or virtually any coax-fed antenna. With an optional LDG balun, it will also match longwires or antennas fed with ladder-line.

The Z-11Pro-II has 8,000 memories in LDG's exclusive "3-D Memory" array, automatically storing tuning configurations for each frequency and band as you use them, for each of four antennas on the single RF port. Frequency sensing circuitry lets the Z-11Pro-II “know” your operating band and frequency. Whenever you transmit on or near a frequency you’ve used before, the Z-11Pro-II retunes from memory almost instantly (even in SSB!). Memories are retained indefinitely.

Rugged and easy-to-read LEDs indicate SWR and status. The Z-11Pro-II uses latching relays which retain the tuned configuration even when powered down; current draw when not tuning is effectively zero.

For maximum flexability, the user has the choice of many battery options; internal or external. There are solder pads on the PC board for the user to install a battery pack (not included) that best suits their needs. You could use 6 AAs and get several years of operation. If weight is a factor (for back packing), then three Lithium AAs will last about a year. If you just need a few months, the Z-11Pro-II will operate fine off a single 9V battery.

Control from the front panel is simple and straightforward; just press Tune while transmitting, and the Z-11Pro-II will begin a tuning cycle. The Z-11Pro-II will even tune while you talk on AM or SSB. Although not required, optional interfaces are available for most Icom, Kenwood, Yaesu and Alinco transceivers. With the interface, a single button-press transmits a carrier, executes a tuning cycle and returns the radio to its original power and mode.

Control cables for Icom transceivers and Yaesu FT-857/897 are included. See description of AT-100pro2.

AT-100pro2/AT-200pro Desktop antenna tuner

The LDG AT-100Pro2 and AT-200pro are desktop tuners which cover all frequencies from 1.8 – 54 MHz, and will automatically match your antenna in no time. It features a two-position antenna switch, allowing you to switch instantly between two antennas. The AT-100Pro2 requires just 1 watt to operation (5W for AT-200pro), but will handle up to 125 watts, making it suitable for everything from QRP up to a typical 100 watt transceiver. The AT-200pro handles up to 200W on HF, max. 100W on 6m, minimum tuning power for the AT-200pro is 5W.
Each tuner includes over 2,000 memories for each antenna, automatically storing tuning configurations for each frequency and band as you use them. Frequency sensing circuitry lets the AT-100Pro2/AT-200pro “know” your operating band and frequency. Whenever you transmit on or near a frequency you’ve used before, the tuner can retune from memory almost instantly: Tuning time is 0.2 sec for memory tune, 0.5 to 6 seconds for full tune.
Rugged and easy-to-read LED bargraphs show power and SWR, and a Function key on the front panel allows you to access data like mode and status. Both tuners uses latching relays which retain the tuned configuration indefinitely even when powered down; current draw when not tuning is effectively zero.
The tuners will match dipoles, verticals, inverted-Vs or virtually any coax-fed antenna. With an optional balun, you can also use longwires or antennas fed with ladder-line. Tunes 6 to 1000 Ω loads (16 to150 on 6m), 6 to 4000 Ω with optional 4.1-balun.
Control from the front panel is simple and straightforward; just press Tune while transmitting a carrier, and the tuner will begin an automatic tuning cycle. For even more comfortable operation control cables for Icom transceivers (any with 4 pin tuner socket) and Yaesu FT-857/897 are included. With the cable, a single button-press transmits a carrier, executes a tuning cycle and returns the radio to its original power and mode.
Power requirements: 11 to 16 volts DC at 500 mA max., dimensions: AT-100pro2 19 x 14 x 5 cm. AT-200pro: 22 x 15,5 x 5cm, Weight: 0,8 Kg.

AT-600pro Automatic Tuner 600W

AT-600Pro

The LDG AT-600Pro closes the gap for mid-range power levels. The tuner allows a maximum power on shortwave (1.8 to 30MHz) of 600W in SSB and CW, max. 300W in RTTY. On 6m (50 to 54MHz) a maximum power of 250W is possible. The AT-600Pro uses the proven LDG switched L network, controlled by a micro processor. This results in automatic tuning within a few seconds. The matching ranges from 6 to 800Ω on shortwave (16 to 150Ω on 6m). This corresponds to an SWR of approx 10:1 which is transformed to approx. 1.5:1.

The LDG At-600Pro offers two selectable coaxial antenna connectors, suitable for any kind of antenna like yagis, dipoles, verticals etc. Longwire, random wire or ladder-line fed antennas can be tuned with an optional balun. Once found matches are stored, separately for each antenna connector, in 4000 memories. This speeds up the matching process considerably.

The front panels offer two LED bar graphs, one for power and one for SWR. A single LED shows which of the two antennas is selected. Easy to operate keys offer the prossibility to change the tuning manually, this is very useful in cases where you want to match the antenna without transmitting.

The LDG AT-600Pro has a size of 22 x 6 x 27cm (WxHxD) and weights approx. 1.5kg. As power supply the tuner requires 11 to 16V DC, max. 750mA. Included in shipment is a DC cable, a short PL coax jumper cable and a cable to connect the tuner to the Icom 4pin tuner socket.

AT-600Pro

Z-100PLUS Automatic QRP antenna tuner

Z-100PLUS with FT-817 (not included)

The Z-100PLUS is an automatic antenna tuner useable for 1.8 to 54 MHz, for any transceiver with 0.1 to 125 Watt power SSB/CW (100W FM, 30W on 6m).The tuner is suitable for any unsymmetrically fed antenna (i.e. Beams, Dipoles, Groundplanes etc.).If the matching range is not sufficient, a 4:1 balun (symmetrical) or a MTFT balun (unsymmetrical) can be used (not included).
The tuner has 200 memories which store settings for a once tuned frequency, when calling up the same frequency again the tuning lasts only some milliseconds. If no matching frequency is found tuning typically takes about 3 seconds.
Due to the use of latching relays the tuner requires only very little power (8 uA when stby)and is well suited for QRP/battery supplied operations. Power requirement during tuning is about 300mA. The Z-100 has two LEDs to show the current state (tuned etc.). Impedance matching range is 6 to 800 Ω, SWR from 10:1 (6m: 3:1), supply voltage required is 7 to 18V. Dimensions 140 x 135 x 38mm, weight ca. 400 gr.


Control cables for Icom transceivers and Yaesu FT-857/897 are included. See description of AT-100pro2.

AT-897plus

Ideal for the FT-897 (but not only for this rig) the AT-897plus offers a wide matching range for coaxial fed antennas. The power for the AT-897plus is supplied over the CAT cable (included), a daisy-chained CAT interface on the rear of the tuner allows for other connections (i.e. PC).
To tune the AT-897plus a carrier in CW, FM or AM is required, with the push of thefront side btton the tuner tries to find a match. This is greatly facilitated with the LDG-Y-ACC Tune Cable which can be directly connected to the tuner.
Due to the use of latching relays the AT-897plus requires only very little power in stby (some uA). The picture shows an AT-897 mounted to the side of a FT-897 (not included).

LDG AT-1000pro automatic antenna tuner 1000 Watt

AT-1000pro

Fully automatic antenna matching with power up to 1000W! Controlled by a microprocessor the SWR is analyzed, a switched L network tuned faster than any manual control could do. Usually matches a SWR of 10:1 dowen to 1.5:1 within 3 seconds. Once found settings are stored in memory, resulting in even faster tuning when the same frequency is later tuned again. The cross needle instrument show forward and reflected power. Tuning is done with low power, not while the PA is engaged!

To offer the same ease of use as with the other LDG tuners, the AT-1000pro has the following improvements over it's predecessor:

• Two selectable antennas
• 2000 memories for each antenna
• Larger, easy to read cross-needle meter
• Dedicated keys for manual fine tuning
• Control cables for Icom transceivers and Yaesu FT-857/897 are included. See description of AT-100pro2.

AT-1000pro

Technical Data AT-1000pro

• 1000 Watt max. power
• Switched L Network
• Large cross needle instrument, forward & reflected power, SWR
• Tuning time 0.1 to 4 seconds, 3 seconds average, 0.2 sec near known frequencies
• Power requirements: 11 to 15VDC, max. 1A
• Two unsymmetric antenna connectors (PL), for symmetric antennas please use a 1:4 balun
• Frequency range 1.8 to 54 MHz, Impedance from 6 to 1000 Ω (6 to 150 Ω on 6m)
• Power ranges: 20 to 1000W SSB, 750W CW, 500W Digital, 100W on 6m
• Suitable for dipoles, verticals, inverted V etc.
• Dimensions: 33 x 23 x 8cm, Weight ca. 3 kg

Control Cable Yaesu FT-857/897

For Z-100pro, Z-11pro, Z-11Pro-II, AT-100pro2, AT-200pro, AT-1000pro.

This cable is included with the abovementioned tuners as of recent production. We offer it here as a spare part.

LDG Tuner Comparision Table