- DL manuals
- LDG
- Tuner
- IT-100
- Operation Manual
LDG IT-100 Operation Manual
Summary of IT-100
Page 1
It-100 operations manual manual rev a page 1 ldg it-100 100-watt automatic tuner for icom transceivers ldg electronics 1445 parran road st. Leonard md 20685-2903 usa phone: 410-586-2177 fax: 410-586-8475 ldg@ldgelectronics.Com www.Ldgelectronics.Com.
Page 2: Table Of Contents
Page 2 table of contents introduction 3 jumpstart, or “real hams don’t read manuals!” 3 specifications 4 an important word about power levels 4 important safety warning 4 getting to know your it-100 5 front panel 5 rear panel 6 installation 7 compatible transceivers 7 installation 7 operation 8 powe...
Page 3
Page 3 introduction ldg pioneered the automatic, wide-range switched-l tuner in 1995. From its laboratories in st. Leonard, maryland, ldg continues to define the state of the art in this field with innovative automatic tuners and related products for every amateur need. Congratulations on selecting ...
Page 4
Page 4 specifications • 0.1 to 125 watts ssb and cw peak power, 30 watts on psk and digital modes, and 100 watts on 6 meters. • latching relays for ultra-low power operation. • 2,000 memories for instantaneous frequency and band changing. • controlled from icom tuner/call button on radio. Powered fr...
Page 5
Page 5 getting to know your it-100 your it-100 is a quality, precision instrument that will give you many years of outstanding service; take a few minutes to get to know it. The it-100 is designed specifically for use with icom transceivers. Tuning is performed when the tuner/call button is pushed o...
Page 6
Page 6 rear panel the rear panel of the it-100 features four connectors. Ant connector: connect the 50-ohm coax antenna feedline to this standard so-239 connector. Gnd connector (wing nut): connect to antenna system ground. Tx connector: connect a 50 ohm coax jumper cable from this standard so-239 c...
Page 7
Page 7 installation the it-100 tuner is designed for indoor operation only; it is not water resistant. If you use it outdoors (field day, for example), you must protect it from the rain. The it-100 is designed for use with coax-fed antennas. If use with longwires or ladder-line-fed antennas is desir...
Page 8
Page 8 operation power-up the it-100 is powered by the transceiver over the radio interface cable. The it-100 is “on” when the radio is turned on, and “off” when the radio is off. Basic tuning operation the it-100 is operated from the front panel tune button on the it-100, or via the tuner/call butt...
Page 9
Page 9 operation from the it-100 front panel normally, the it-100 is best operated from the transceiver’s front panel tuner/call button, but there are certain circumstances in which operating from the it-100 front panel gives more control. There are three operations which can be carried out by use o...
Page 10
Page 10 initiate a memory tune cycle to initiate a memory tuning cycle, press and hold the tune button on the front of the it-100 until the tuning/status led lights up. A memory tuning cycle will begin. The it-100 will force the transceiver into am mode, change the power level to one that is appropr...
Page 11
Page 11 force a full tune cycle most of the time, the it-100’s memory tuning will allow a good match to be found quickly, if transmitting on the same frequency as a previously stored match. But sometimes, especially when using a different antenna, the memory tuning will recall a previous match which...
Page 12
Page 12 status of leds the swr led and tuning led are used to indicate both operating modes, tuning status, and error codes. The following table lists the led status codes and their meaning. Led indication meaning tuning led on. Tuner is tuning. Tuning led goes out, swr led comes on solid. Tuner has...
Page 13
Page 13 the supplied radio interface cable is 14 inches long. If it is desired that the it-100 is positioned farther from the transceiver than this cable length allows, a custom cable will need to be constructed. This can be accomplished in two ways: cut the supplied cable and solder a jumper wire b...
Page 14
Page 14 mars/cap coverage the it-100 provides continuous tuning coverage over its specified range; not just in the ham bands. This makes it useful for mars or cap operation, or any other legal hf operation. Theory of operation some basic ideas about impedance the theory underlying antennas and trans...
Page 15
Page 15 it will exhibit capacitive or inductive reactance, causing it to have an impedance other than 50 ohms. When the impedance of the antenna is different from that of the transmitter and transmission line, a “mismatch” is said to exist. In this case, some of the rf energy from the transmitter is...
Page 16
Page 16 the ldg it-100 in 1995, ldg electronics pioneered a new type of automatic antenna tuner. The ldg design uses banks of fixed capacitors and inductors, switched in and out of the circuit by relays under microprocessor control. An additional relay switches between high and low impedance ranges....
Page 17
Page 17 a word about tuning etiquette be sure to use a vacant frequency when tuning. With today’s crowded ham bands, this is often difficult. However, causing interference to other hams should be avoided as much as possible. The it-100’s very short tuning cycle, as little as a fraction of a second, ...
Page 18
Page 18 out of warranty service any time a product fails after the warranty, ldg wants to help you get it fixed. Send the product to us for repair. We will determine what needs to be done, and, based on your prior instruction, either contact you with an estimate or fix it and contact you with a requ...