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- YT-100
- Operation Manual
LDG YT-100 Operation Manual
Summary of YT-100
Page 1
Yt-100 operations manual manual rev a page 1 ldg yt-100 automatic tuner for yaesu ft-857/897 and ft-100 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 re ad manuals!” 3 specifications 4 an important word about powe r levels 4 important safe ty warning 4 ge tting to know your yt-100 5 front panel 5 rear panel 6 installation 7 compatible transceivers 7 ft-100, ft-100d installatio...
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 comes on), then release. The transceiver automatically switches to am mode, reduces power, and keys up, and the yt-100 begins a tuning cycle. At the end of the tuning cycle, the original mode and power level is restored. Wait for the tuning cycle to end; you’re now ready to operate! Specifica...
Page 5
Page 5 getting to know your yt-100 your yt-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 yt-100 is designed specifically for use with the ft-100/857/897. Tuning is performed when the tune button is pushed on the...
Page 6
Page 6 rear panel the rear panel of the yt-100 features six 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 co...
Page 7
Page 7 installation the yt-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 yt-100 is designed for use with coax-fed antennas. If use with longwires or ladder-line-fed antennas is desir...
Page 8
Page 8 ft-100, ft-100d installation: connect the hf/50 mhz antenna jack on the ft-100 to the tx jack on the back of the yt-100, using a 50 ohm coax cable rated 125 watts or greater. Connect the supplied radio interface cable to the mini-din 8-pin jack on the rear of the yt-100, marked “ radio ”. Con...
Page 9
Page 9 ft-857 and ft-897 installation connect the hf/50 mhz antenna jack on the ft-857/897 to the tx jack on the back of the yt-100, using a 50 ohm coax cable rated 125 watts or greater. Connect the supplied radio interface cable to the mini-din 8-pin jack on the rear of the yt-100, marked “ radio ”...
Page 10
Page 10 if it is desired to operate the ft-100/857/897 via computer control, connect the yaesu ct-62 cat interface cable to the yt-100 port labeled “ computer ”. The yt-100 will automatically feed through any cat commands coming in over this port to the transceiver and vice versa. Note that any soft...
Page 11
Page 11 although the ft-100, ft-857, and ft-897 are all designed to transmit and receive on all hf bands plus 6 meters, 2 meters and 70 centimeters, the yt-100 is designed only to work on hf and 6 meters. In addition, the ft-100/857/897 transceivers all transmit uhf and vhf on a different antenna ja...
Page 12
Page 12 toggle bypass mode: to toggle between bypassed and active mode, press the front panel tune button on the yt-100 momentarily. The status led will flash three times to indicate that the tuner is in bypass mode. Press the front panel tune button momentarily again to recall the previous tuner se...
Page 13
Page 13 initiate a memory tune cycle: to initiate a memory tuning cycle, press and hold the tune button on the front of the yt-100 until the status led lights up. A memory tuning cycle will begin. The yt-100 will force the transceiver into am mode, change the power level to one that is appropriate f...
Page 14
Page 14 force a full tune cycle: sometimes, if you are transmitting on a previously tuned frequency, but something has slightly changed in your antenna system (maybe the antenna was re-oriented, for example), performing a memory recall tune will find a stored match that is acceptable, but is not as ...
Page 15
Page 15 status led the status led is 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 status led on. Tuner is tuning. Status led goes out, then blinks once. Tuner has completed a tuning cyc...
Page 16
Page 16 remote operation if it is desired that the yt-100 be located away from the operating position, remote operation is possible. A remote switch (not supplied) may be connected to the remote jack on the rear of the yt- 100. The remote jack accepts a 1/8” (3.5mm) stereo plug. In order to use the ...
Page 17
Page 17 the yt-100 monitors the computer port for activity before beginning any tuning cycle. Only when the cat line is idle for a period of time will the yt-100 take over control of the cat line in order to.
Page 18
Page 18 perform a tuning cycle. When the tuning cycle is complete, control of the cat interface is returned to the pc. This procedure is completely automatic, and is transparent to the user. Simply hook up a pc, and use the rig control software as normal. Press the tune button on the yt-100 when tun...
Page 19
Page 19 have the same impedance, the system is said to be “matched”, and maximum transfer of power from the transmitter to the antenna occurs. While the transmitter output circuit and transmission line are of fixed, carefully designed impedance, the antenna presents 50-ohm, non-reactive load only at...
Page 20
Page 20 antenna at all. A tuner simply “fools” the transmitter into behaving as though the antenna were resonant, avoiding any damage that might otherwise be caused by high reflected power. For best performance, the antenna used should always be as close to resonance as is practical. The ldg yt-100 ...
Page 21
Page 21 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 yt- 100’s very short tuning cycle, as little as a fraction of a second,...
Page 22
Page 22 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...