Force 12 Sigma-280 Magnum Скачать руководство пользователя страница 10

DW-Manual-Sigma-280 Magnum-001   FORCE 12  SIGMA-280Magnum Assembly Instructions   Page  10   of   32 

 

 

 

_____a) 

Slide both covers over the coils. 

_____b) 

Slide the end caps over both of the covers, being sure not to disturb the coil 
spacing. 

_____c) 

If the cover drain holes were not drilled earlier, drill four (4) drain holes in a 
straight line in what will be the bottom of the coil covers. Use a 1/8” or 3/16” 
drill bit. 

_____d) 

Rotate the drain holes so that they are down. 

_____e) 

Use a good quality silicone sealant (RTV) and run a bead along the caps in 
two (2) places: 

 

_____e1. 

Around the hole where the element goes through each cap 

 

_____e2. 

Around each cap where the cover enters the cap. 

_____f) 

The caps and covers can be painted if desired. 

 
_____24) 

The driver is tuned next. 

 
_____25) 

Be sure the relay boxes on both elements are operating in tandem. 

 
_____26) 

Using the same basic procedure as on the reflector, tune the driver. 

 
_____27) 

Attach the actual balun, feed line and matching hairpin to the driver feed point on the relay 

box. 

 

_____a) 

Set the initial spacing on the hairpin coil about ¾” between turns. 

 
_____28) 

Energize the CW/Phone relays for LOW PHONE. 

 
_____29) 

Tune the coils on the driver for a frequency of 3.790-3.795 and secure the far ends as before, 

then secure the coil covers. 

 
_____30) 

Adjust the hairpin match for the lowest VSWR. 

 
_____31) 

Open the CW/Phone relay and adjust the coils on the relay for the operating frequency (i.e. 

3505). 

 

_____a) 

Secure the cover on the relay box. 

 
_____32) 

Secure the coils in position, if not done so already. 
_____a) 

Be sure the U-bolt is tight and the coil is in position for proper tuning. 

_____b) 

Use a ¼” drill and drill through the tip end of the coil (flattened end) and 
through the element. 

_____c) 

Use a ¼ - 20 bolt and ny-loc to secure the coil. 

 
_____33) 

Secure the covers. 

 

 

_____a) 

Slide both covers over the coils. 

_____b) 

Slide the end caps over both of the covers, being sure not to disturb the coil 
spacing. 

_____c) 

If the cover drain holes were not drilled earlier, drill four (4) drain holes in a 
straight line in what will be the bottom of the coil covers. Use a 1/8” or 3/16” 
drill bit. 

_____d) 

Rotate the drain holes so that they are down. 

Содержание Sigma-280 Magnum

Страница 1: ...coax feed line goes to the driver This manual describes building each dipole element the attachment to the boom of both and how to tune the antenna Yagis for 80 75 meters are tuned much differently t...

Страница 2: ...reflector is set first without the driver in the circuit to the correct frequencies for phone and CW The driver is then set with the reflector active Once set the reflector is not re adjusted as it is...

Страница 3: ...tached to the element and to the center riser post on the element mount The element tubing segments are both bolted and riveted The bolted joints are on the larger tubing and the riveted joints are on...

Страница 4: ...tion has either an A or B on it and the sections taper as they go towards the tip Assembly requires only that the identifications are matched All the rivet holes are pre drilled and will align exactly...

Страница 5: ...crimped swaged end of the larger piece _____2b If the rivet holes do not align please check to be sure the section is oriented properly and that the correct side A or B is on the correct side It shou...

Страница 6: ...of the two 2 cover tubes These will be the drain holes They can be drilled later but now is a better time _____f Spread the turns on the coils for about one 1 turn per inch or about one tubing diamete...

Страница 7: ...f the eye bolts are not already installed in the riser on each element mount slide one in from each side so that there is a loop the eye on each side of the riser _____16 Attach the center of each lin...

Страница 8: ...saddle can then be removed from each coil _____4 While tuning tape the covers and end caps to the element to prevent them from sliding out of reach _____5 If not already done attach both elements to t...

Страница 9: ...3 750 for the JA window the reflector should be tuned lower to about 3 750 The F B in the window will be a bit less but the operating bandwidth will be much wider The VSWR curve for the antenna both e...

Страница 10: ...the driver feed point on the relay box _____a Set the initial spacing on the hairpin coil about between turns _____28 Energize the CW Phone relays for LOW PHONE _____29 Tune the coils on the driver fo...

Страница 11: ...the antenna is balanced with the coax and balun _____2 Carefully lower the antenna into the cradle Be sure to watch for the relay box control lines and the coax feed line _____3 Center the antenna fo...

Страница 12: ...not designed This warranty does not cover transportation installation punitive or other costs that may be incurred from warranty repair or installation Force 12 Inc must be notified and warranty repa...

Страница 13: ...DW Manual Sigma 280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 13 of 32...

Страница 14: ...DW Manual Sigma 280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 14 of 32...

Страница 15: ...DW Manual Sigma 280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 15 of 32...

Страница 16: ...DW Manual Sigma 280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 16 of 32...

Страница 17: ...DW Manual Sigma 280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 17 of 32 Sigma 280 Magnum at WA5VGI...

Страница 18: ...280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 18 of 32 End of coil secured with 20 bolt Note cap is already on at the center The tube and outer cap are already positioned on the...

Страница 19: ...ma 280 Magnum 001 FORCE 12 SIGMA 280Magnum Assembly Instructions Page 19 of 32 Coil cover tube and caps Note the through bolts on this mounting bracket were for a proto type only The actual go from th...

Страница 20: ...ERROR undefined OFFENDING COMMAND f STACK...

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