LDG YT-450, Operation Manual

Page 1: ...EV A PAGE 1 LDG YT 450 100 Watt Automatic Tuner for Yaesu FT 450 and FT 950 Transceivers LDG Electronics 1445 Parran Road St Leonard MD 20685 2903 USA Phone 410 586 2177 Fax 410 586 8475 ldg ldgelectr...

Page 2: ...1 Operation 11 Power up 11 Basic Tuning Operation 11 Toggle Bypass Mode 12 Initiate a Memory Tune Cycle 13 Force a Full Tune Cycle 14 Status LED 15 Application Information 15 Mobile Operation 15 Tunin...

Page 3: ...ier measure the transmit frequency and then restore the radio to its previous mode and power level Additionally the YT 450 also draws power directly from the radio so no extra cable is needed JUMPSTAR...

Page 4: ...cally for the Yaesu FT 450 and FT 950 HF transceivers Pass thru CAT port allows YT 450 to control the FT xxx over the CAT bus while still allowing a host PC to also control the radio Pass thru CAT por...

Page 5: ...fails during overload it could also damage your transmitter or transceiver Be sure to observe the specified power limitations IMPORTANT SAFETY WARNING Never install antennas or transmission lines ove...

Page 6: ...n indefinitely even when DC power is completely removed Tuning memories are stored in FLASH memory The YT 450 has 2 000 frequency memories When tuning on or near a previously tuned frequency the YT 45...

Page 7: ...This is a pass thru port to the RADIO port and is switched under software control by the YT 450 s microprocessor The firmware of the YT 450 has been written such that this will seem transparent to th...

Page 8: ...s designed to be used ONLY with the following Yaesu 100 watt transceivers FT 450 FT 950 WARNING Do not attempt to use the YT 450 with any other transceivers even if the CAT plug fits At best the YT 45...

Page 9: ...ing DB 9 plug to the jack marked Radio on the YT 450 On the FT 450 press and hold the F button on the front panel for one second to enter the extended menu Rotate the DSP SEL knob until EXT MENU is sh...

Page 10: ...cable rated 125 watts or greater Connect the 8 pin mini DIN connector on the supplied radio interface cable to the jack marked TUNER on the FT 950 Connect the adjacent DB 9 plug to the CAT jack on th...

Page 11: ...ty LDG recommends that you connect your tuner to a suitable ground a common ground rod connected to buried radials is preferred but a single ground rod a cold water pipe or the screw that holds the co...

Page 12: ...saved tuning settings but automatically defaults to a full tuning cycle if no stored data is available In both cases at the end of the tuning cycle the carrier is held for 1 5 seconds after tuning is...

Page 13: ...or tuning and key the radio When tuning is complete the transceiver will return to the operating mode and power level previously set You will notice that the radio toggles between VFO A and VFO B befo...

Page 14: ...y for this frequency To force a full tuning cycle press and hold the Tune button on the front panel of the YT 450 until the Status LED lights up and keep holding until the Status LED goes out again Re...

Page 15: ...INFORMATION Mobile Operation The YT 450 is perfectly suited to mobile operation It can be installed under the dashboard along with the transceiver or mounted remotely The only requirement is that the...

Page 16: ...y the YT 450 for controlling the radio The YT 450 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 450 take ove...

Page 17: ...that when daisy chaining a second YT 450 there is only one TUNER port on the rear of the FT 950 so there is no place to plug in the second YT 450 s 8 pin mini DIN connector This connector provides pow...

Page 18: ...tance and impedance in the form of capacitive or inductive reactance Transmitters transmission lines antennas and impedance The output circuit of a transmitter the transmission line and the antenna al...

Page 19: ...some meters calculate SWR for you More advanced units can measure forward and reflected power simultaneously and show these values and SWR at the same time An antenna tuner is a device used to cancel...

Page 20: ...ower levels The single lead primary through the center of the sensor transformer provides RF current sampling Diodes rectify the sample and provide a DC voltage proportional to RF power These two volt...

Page 21: ...ls just in case you lose this one When you are thinking about the purchase of other LDG products our website also has complete product specifications and photographs you can use to help make your purc...

Page 22: ...accurate and complete Ask your shipper for a tracking number or a delivery verification receipt This way you know the product arrived safely at LDG Be sure to give us your email address so our shipper...