• LDG YT-1200 Automatic Tuner
• LDG Z-817 Automatic Tuner
• LDG KT-100 Automatic tuner
• LDG IT-100/YT-100 Automatic Tuner
• LDG RT-100 + RC-100 Automatic Outdoor tuner
• LDG Z-11Pro II Automatic Tuner
• LDG AT-100Pro II/AT-200Pro Automatic Tuner
• LDG AT-600Pro2 Automatic Tuner
• LDG Z-100Plus Automatic Tuner
• LDG AT-897Plus Automatic Tuner
• LDG AT-1000Pro2 Automatic Tuner

Yaesu radios are very popular and so LDG is working to offer a suitable tuner for each radio. And even when the Yaesu radios do have a built in tuner, there is nothing which coulnd't be improved.

The LDG YT-1200 is suitable for use with the FT-450(D), FT-950, FT-DX1200 and FT-DX3000. In contrast to the built-in tuners LDG tuners offer various benefits: less power consumption though latching relays, larger tuning range (typ. 4 to 1000 Ω) and faster tuning. Supplied with the tuner is a cable which provides power and CAT data from the radio. This allows for very convenient tuning - just press the 'Tune' button on the tuner. The radio will be switched to CW, the power is reduced, then the tuning process starts. After tuning the radio is reverted to it's previous mode and power setting.

The CAT interface of the radio is duplicated on the tuner, so you don't loose any functionality. You can continue to use your favorite software with your radio and the tuner at the same time.

This tuner has one coaxial connector for one coax-fed antenna - dipoles, verticals, beams, whatever. Wire antennas would require an optional balun.

For further technical details please see the Comparision table of LDG Tuners at the end of this page.

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. 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 (Z-817H: 75W)
• 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 for Yaesu (30cm).

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

LDG KT-100

LDG KT-100 Rear view

The KT-100 is a external Tuner for Kenwood Radios with Tuner Socket.
The KT-100 does everything that is needed for the tuning alone. You only need to press the Tune button on the transceiver and the tuner will does the rest Specifically, this means the transceiver is controlled to 10W back, switched to CW and sent a carrier.

The Tuner is connecting with the supplied cable directly to the tuner socket. The power supply is also trough this connection.

Special TS-480HX: If an external tuner is connected to the Kenwood TS-480HX transceiver, the output power is automatically throttled to 100W.

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 cable (35cm) included

LDG IT-100

LDG YT-100

LDG IT-100 Rear

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 the supplied 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.

The IT-100 tuner supports all Icom radios 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.

Technical data:

• 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 cable (35cm) included

RT-100MK2 Outdoor antenna tuner

The LDG RT-100MK2 is a 100W automatic antenna tuner for split installation.
The tuner can be installed directly at the antenna and is supplied with power via the coaxial cable. The tuner is designed for unbalanced antennas and has beside the two PL jacks for input and output, an additional screw for connecting an ground wire.

The RT-100MK2 includes a remote control unit.
This unit has a remote power supply with bias-Tee's to power the remote tuner RT-100 directly via the coaxial cable. In addition, the tuning can be triggered manually, also. Unintended tuning can be prevented by "blocking" the RC-100 tuner. A status LED provides reliable information about the operating state.

Technical data:

• 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.
• Weight 500g

RT-600 Outdoor antenna tuner

Same as RT-100MK2 (see above), but 600 Watt. With remote control unit.

• 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.

The LDG AT-100Pro2 and AT-200pro2 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-200pro2), but will handle up to 125 watts, making it suitable for everything from QRP up to a typical 100 watt transceiver. The AT-200pro2 handles up to 200W on HF, max. 100W on 6m, minimum tuning power for the AT-200pro2 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-200pro2 "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.
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 and Yaesu transceivers is offered as an option. 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-200pro2: 22 x 15,5 x 5cm, Weight: 0,8 Kg. A DC power cable is included.

The LDG AT-600Pro2 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-600Pro2 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-600Pro2 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-600Pro2 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.

Optional control cables are also availble. But please note that the automatic tune function, which these cable offer can lead to accidental tuning with high power, possibly destroying your amplifier or tuner. Always tune with low power!

The difference between the AT-600pro2 and the AT-600Pro is a connection for an optional external analog instrument (M-600).

AT-600Pro2

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 2000 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 6 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-100Plus 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 140 x 38mm, weight ca. 400 gr. A DC cable is included.

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. The required control cable between tuner and radio is included.
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).

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 easy t oread LED bar graphs show power and SWR. 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-1000pro2 has the following improvements over it's predecessor:

• Two selectable antennas
• 2000 memories for each antenna
• Dedicated keys for manual fine tuning

AT-1000pro2

Technical Data AT-1000pro2

• 1000 Watt max. power
• Switched L Network
• Bargraph for 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

M-1000

New The M-1000 is intended for the AT-1000Pro2 and offers a beautiful and easy to read analog instrument. It shows the most important data at a glance. The power range is selectable between 100 and 1000W, the instrument shows either forward or reflected power or SWR. The power display can be switched between average and peak value.

The following control cables are offered by LDG or supplied with select tuners. With the exception of cable LDG-Y-ACC all cables serve to supply the tuner with power and accomodate the tune function.

Short coaxial cables to conect the radio to the tuner. LowLoss cable type H-155 with PL connectors on bith sides.

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