Yaesu_G-450A_G-650A_user.pdf

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1、G-450A G-650A Antenna Rotator it is not particularly designed to resist bending. Consult with your dealer or a professional tower/antenna installer for assistance in procuring a mast of specifications adequate for your antenna system. Center line The rotation becomes off-centered for masts with a di

2、ameter of less than 48. Mast adjustment plate (Option) Use two plates for mast diameters between 32 and 38. Use one plate for mast diameters between 39 and 47. Do not use a plate for mast diameters between 48 and 50. Insert the mast adjustment plate(s) between the mast and the clamps on the rotor. 1

3、 Controller Front/Rear Panel Controls and Switches Controller Front Panel Controller Rear Panel When replacing fuses, be sure to use a fuse of the same type and current rating. 2 Rotator Unit Components and Dimensions Rotator Unit Rotator Attachment Plate Dimensions The tower plate onto which the ro

4、tator unit is mounted must be drilled with four holes of 9 mm diameter, equally spaced on a circle of 119 mm diameter. The center-to-center distance between any two adjacent mounting holes is 84 mm. 3 Which Antennas Can Be Attached? The size and type of antenna(s) that can be attached to this rotato

5、r will differ widely, depending on the installation method, local terrain, and the maximum expected wind speeds at your location. The following pages describe typical antennas which are acceptable for installation with the G-450A or G-650A. The discussion below assumes maximum wind speeds of 30 mete

6、rs per second (67 mph/108 kph), and it is recommended that you include a safety margin of at least 30% to account for higher wind gusts or other factors which might potentially cause damage to your installation. ? Pole-Mounted Antennas Mounting of the rotator on a pole or mast results in a significa

7、nt de-rating of the size of the antenna which can be mounted, due to the tremendous bending forces applied to the rotators clamps. For pole mounting, the attached antenna must have a net mounted weight (combined weight of antenna plus mast) of 10 kg or less, and the product of multiplying the Antenn

8、a Wind Load Area (in m2) by the Height of the Antenna Mast (in m) must be 0.25 or less (see Table 1 and Fig. 1). Antenna Weight + Mast Weight 10 kg. Antenna Wind Load Area Height of Antenna Mast 0.25 Refer to the antenna manufacturers specification sheet for determining the weight and the surface ar

9、ea of the proposed antenna. For a 50 MHz 5-element antenna of surface area of 0.3 m2 (see Table 1), the above specifications for pole mounting will be met if (A) the antenna is mounted on a mast not longer than 0.8 m (0.3 0.8 = 0.24 0.25). These are approximate values; Wind Loading Area will vary si

10、gnificantly depending on element and boom diameters. Example Example of a 50MHz Band, 5-Element Yagi Antenna Table 1: Wind Loading Areas for Common Antennas (Typical) Less than 0.8m Mast Clamp GC-038B (option) Band (MHz) Elements Area (m2) Band (MHz) Elements Area (m2) Band (MHz) Elements Area (m2)

11、7 7 7 7 14 14 14 21 21 21 21 21 2-element 1-element, w/loading coils 2-element, w/loading coils 3-element, w/loading coils 3-element 4-element 5-element 3-element 4-element 5-element 6-element 2-element, Swiss Quad 2.2 0.2 0.6 1.1 0.7 1.2 1.7 0.45 0.6 0.8 1.3 0.3 28 28 28 28 7/14 7/14 14/21 14/21 21

12、/28 21/28 14/21/28 14/21/28 3-element 4-element 5-element 2-element, Swiss Quad 3-element, trapped 4-element, trapped 3-element, trapped 4-element, trapped 3-element, trapped 4-element, trapped 3-element, trapped 4-element, trapped 0.3 0.42 0.6 0.3 0.5 0.8 0.4 0.5 0.3 0.4 0.4 0.5 50 50 50 50 144 144

13、 144 144 430 430 430 430 4-element 5-element 6-element 2-element, Swiss Quad 10-element 10-element, stacked 10-element, x 4 10-element, x 4 x 2 12-element 12-element, stacked 12-element, x 4 12-element, x 4 x 2 0.25 0.3 0.37 0.3 0.2 0.44 0.95 2.0 0.06 0.12 0.3 0.6 4 ? Tower-Mounted Antennas In the p

14、referred tower-mounting configuration, the antenna Wind Loading Area must be less than 1 m2 (G-450A) or 2 m2 (G-650A), and the “K” factor (see below) must not exceed 100 (G-450A) or 180 (G-650A), where K = Antenna Turning Radius (m) x Antenna + Mast Weight (kg). Refer to the antenna manufacturers sp

15、ecification sheet for determining the turning radius and weight of the antenna. In this example, a 14 MHz 3-element Yagi of Turning Radius 7.5 m, Weight of 14 kg, and Surface area of 0.7 m2 is proposed for tower mounting below a 3-element 21/28 MHz trapped Yagi of Turning Radius 3.5 m, Weight of 13

16、kg, and Surface Area of 0.3 m2. The mast weight is 5 kg. Note: In such “Christmas Tree” installations, compute the mast weight separately for each an- tenna, using the relative heights of the two antennas to apportion the mast weight The antenna system K factor, then, is the sum of the two antenna K

17、 factors: K1 = K factor of 14 MHz 3-element Yagi. K1 = Turning Radius (7.5 m) Weight (14 kg + 2.5 kg) = 123.75 | | Antenna Weight Mast Weight (5 kg 2) K2 = K factor of 21/28 MHz 3-element trapped Yagi. K2 = Turning Radius (3.5 m) Weight (13 kg + 2.5 kg) = 54.25 | | Antenna Weight Mast Weight (5 kg 2

18、) KTotal = K1 + K2 = 123.75 + 54.25 = 178 The antenna system Wind Loading Area is: 0.7 m2 + 0.3 m2 = 1.0 m2 The Wind Loading Area is within the specifications for both the G-450A and G-650A, but the net K factor (178) can only be met by the G-650A. Therefore, the above antenna system should only be

19、mounted using a G-650A (or larger) rotator. Note: Installation of a Thrust Bearing such as the GS-065 does not allow the elimination of the mast weight from the K-factor calculations above. Example Mast Bearing GS-065 (option) 5 Control Cable Installation Before installing the rotator, mast, and ant

20、enna, prepare the rotator control cable and test rotator system performance on the ground. Potential alignment, cabling, or other problems can quickly be resolved on the ground; once a rotator is mounted, however, troubleshooting may require that the tower be climbed and/or the rotator be removed an

21、d lowered to the ground! Control Cable Preparation The control cable to be used should have six stranded conductors of at least 0.5 mm (#20 AWG) diameter if the cable is shorter than 40 m in length (125); if the cable is longer than 40 m, use conductors with a diameter of 0.75 mm (#18 AWG) or larger

22、. 1. Disassemble the supplied round plug: slide off the rubber boot, remove the setscrew from the shell using a small screwdriver, then unscrew the shell from the plug. Save the setscrew in a safe place until step 10, so you dont lose it. 2. Slide the rubber boot and the round shell over the “rotato

23、r” end of the cable. Leave enough cable protruding to allow easy dressing the end of the cable. 3. Using special care to avoid nicking the insulation of the individual wires, strip back 15 mm (about 5/8”) of the outer jacket of the cable from both ends. Now strip 5 mm (about 3/16”) of insulation fro

24、m each wire, being careful not to nick the conductors. 4. Solder the wires to the round plug pins, noting the color of the wire and the number associated with each pin for reference later. Pin 7 of the round connector is not used! Confirm that all solder joints are firm and cleanly made, as this par

25、t of the cable will be difficult to access once the rotator is installed on top of the tower. Do not slide the shell onto the connector at this time. 5. Crimp the supplied pin contacts onto the wires on the opposite end of the cable, per the illustra- tion on the next page. 6. Referring to your note

26、s of the wire color at each pin of the round (rotator end) connector, insert the pins into the rectangular plug at the opposite (controller) end of the cable. Be sure that each wire from the round connector is routed to the corresponding pin number in the rectangular connector (i.e. 1 to 1, 2 to 2,

27、etc.). 7. Temporarily connect the round plug to the rotator, and the rectangular plug to the controller. Make sure that the POWER switch is set to the Off position, then connect the AC plug to your stations AC power outlet. 8. Turn on the POWER switch. The pilot lamps on the controller should become

28、 illuminated, and the meter needle on the controller may rotate so as to align itself with the current position of the rotator (remember, the two units have not been aligned with each other). 9. Press the LEFT (left rotation) switch, and confirm that the rotator (when viewed from the top) and the co

29、ntrollers needle turn counter-clockwise together. Stop rotation, then press the RIGHT (right rotation) switch, and confirm that the rotator and indicator needle turn clockwise. If rotation does not occur as indicated, turn the POWER switch off, and re-check your cable connections. 10. If the rotator

30、 and controller are working as described, replace the plug shells, setscrew, and rubber boot (removed in step 1). 6 5 mm 15 mm Assembly of 6-pin Plastic Connector Assembly of 7-pin Metal Connector Wiring for the control cable (identical numbers to be inte Pin No.7 for the metal connector is not used

31、. 7 Mounting the Rotator and Antenna ? Indoor Performance Check and Alignment 1. Temporarily connect the rotator unit and the controller using the connection cable prepared per the previous section. 2. Check to be sure that the POWER switch on the controller is set to OFF, then plug the controllers

32、AC cable into your stations AC outlet. 3. Set the controllers POWER switch to ON. Verify that the controllers pilot lights have become illuminated. 4. Hold down the LEFT (Left rotation) switch, and continue to hold it down until the rotator reaches the counter-clockwise position where it automatical

33、ly stops (“Left” represents counter-clock- wise rotation when the rotator is viewed from the top). 5. When the rotator has reached the left “STOP” position, release the LEFT switch, and check to see if the controllers indicator needle is pointing to 0 (N: North). If the indicator needle is out of al

34、ignment, slightly loosen the needle adjustment screw (using a small Phillips screwdriver) on the face of the indicator, then turn the white needle adjustment knob so that the indicator needle points precisely to 0. 6. Just above the round connector jack on the rotator unit, you will observe two rais

35、ed calibration marks (one each on the (rotating) bell and (fixed) base of the rotator).These two marks should be directly aligned with each other. If not, place a small piece of masking tape on the rotating bell and the fixed base of the rotator unit, and make a calibration mark on each piece of tap

36、e, so as to mark the current position of the bell relative to the base. This calibration mark will be used to verify the amount of rotation in the next step. 7. Hold down the RIGHT (Right rotation) switch, and continue rotating to the right until the calibration marks (from Step 6) are again precise

37、ly aligned. Now check the indicator needle, which should also have rotated fully 360 so as to be pointing exactly to 0. If the indicator needle is not pointing exactly to 0, go to the rear panel of the controller, and set the Adjustment Potentiometer Selection Switch (see Figure 2) to the right posi

38、tion. Now use a small screwdriver to adjust the Indicator Needle Adjustment Potentiometer (Fig. 2) so that the indicator needle points exactly to 0. 8. After aligning the needle to 0, set the Adjustment Potentiometer Selection Switch back to the left position. 9. Hold down the RIGHT switch again, an

39、d continue rotation to the right. You should observe the “OVERLAP” LED becoming illuminated as rotation passes the 360 point. If the OVERLAP LED does not light up at the 360 position, the Overlap LED Adjustment Poten- tiometer may be used to align the illumination threshold to the 360 point. 10. Che

40、ck to verify that rotation automatically stops at approximately 90 (East; representing a total rotation range of 450 from the original starting point). 11. Press the LEFT and RIGHT rotation switches a few more times, verifying that rotation appears to be normal. If so, press the LEFT switch to retur

41、n the rotator to the fully counter-clockwise (0) position. 12. At this time, you must determine whether you wish to leave the “Left Stop” position at North, or whether you wish to set it to South (to allow uninterrupted rotation from southeast to north- east to northwest to southwest, for example).

42、If you wish to leave the “Stop” at North, the checkout process is complete. If you wish to set the “Stop” to South, again loosen the needle adjustment screw on the face of the controller, and rotate the needle to the “South” position. Be certain that the rotator is fully rotated to the “LEFT” positi

43、on in either case. The position of the “Left Stop” can be set to whatever position you like (North, South, East, or West). Just remember where you have set it, because the antenna must initially be aimed in the same direction when it is installed on the mast (see next section). 13. Turn the POWER sw

44、itch OFF. This completes the ground-based testing of the rotator and controller. ADVICE 8 ? Installation of Rotator and Antenna on Tower The procedure for installing the rotator depends on the type of tower used. The following instruc- tions are generally applicable to most guyed, crank-up, or roof

45、towers. 1. Attach the rotator to the towers rotator mounting plate, using the supplied M8X16 bolts and spring washers. It is recommended that the tips of the bolts be lightly dipped in lubricating grease, to ease disassembly in the future. 2. If a thrust bearing (such as the optional Yaesu model GS-

46、065) is to be utilized, mount it on the top of the tower (see Figure 4) using the supplied hardware. 3. Using a “gin pole” or other raising fixture, insert the antenna mast through the bearing from above, and set the mast in the rotators mast clamps. Do not tighten the mast clamps at this time; just

47、 secure the U-bolts to the point where the mast is held in place, but is allowed to rotate freely. 4. Partly tighten the thrust bearings mast bolts, so as to center the mast in the thrust bearing. When you are satisfied that the mast is centered, back off slightly on each of the thrust bearings mast

48、 bolts, and (if possible) lift the mast by a very small amount (approximately 5 mm or 3/16”), just enough to lift the bottom of the mast slightly off the top of the rotator. Now re-tighten the thrust bearings mast bolts to secure the mast in place. This procedure takes all the weight of the mast and

49、 antennas off of the rotator; all weight is being carried by the thrust bearing. If no thrust bearing is used, the mast should be allowed to rest on the top of the rotator. 5. Verify that the mast rotates freely in the mast clamps, and that the mast is properly centered in the clamps. Now tighten the nuts on the U-bolts of the mast clamp. Do not over-tighten the nuts on the mast clamps. They should be tightened until the spring washer becomes flat, th