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MFJ-1756 Instruction Manual 

6 Meter Ground Plane Antenna 

ASSEMBLY PROCEDURE 

 
Locate the base of the antenna (Figure 1) to begin the assembly. 
 

 

 

Figure 1

  Antenna base. 

 

Step 1:  

To attach the matching hairpin stub to the antenna base (Refer to Figure 2): 
A. Place the longer end of the matching stub through the 10-32 screw that extends 

through the ceramic insulating post on top of the antenna base.  Thread the 10-32 nut 
on the 10-32 screw and tighten with a 3/8" open end wrench.  Do not over tighten..   

B.  Locate the hole on the top of the base and insert the 4-40 screw through the holes on 

the short end of the matching stub and the antenna base.  From the inside of the base, 
thread the 4-40 kep nut on the screw and tighten.  To tighten, hold the screw with the 
1-Phillips screwdriver and hand tighten the nut. 

 

 

Figure 2

  Antenna base with Matching Stub attachment. 

Содержание MFJ-1756

Страница 1: ...to a perfect 1 1 SWR Power capability is 1000 watts RF continuous CHOOSING A LOCATION FOR THE ANTENNA WARNING Improper installation and assembly can be hazardous Read these instructions thoroughly be...

Страница 2: ...find the following items Before attempting to install this antenna check the parts bag to insure that all hardware is accounted for In the event anything is missing please contact MFJ Enterprises Inc...

Страница 3: ...ds through the ceramic insulating post on top of the antenna base Thread the 10 32 nut on the 10 32 screw and tighten with a 3 8 open end wrench Do not over tighten B Locate the hole on the top of the...

Страница 4: ...directions Refer to Figure 4 for an illustration of the radial assembly Step 3 Insert a radial through the two left holes located on the front and rear of the base Refer to Figure 3 and the holes lab...

Страница 5: ...the radials in place stack the two stainless steel plates together and place them over the radials in the bottom of the antenna base See Figure 5 Place one lock washer on each of the 10 32 Phillips h...

Страница 6: ...e U bolt See Figure 6 Figure 6 U bolt assembly B Place the U bolt around the mast not included and install the saddle on the U bolt Be sure the saddle is in the correct position to bite into the mast...

Страница 7: ...he other fiberglass plate through the U bolt from the front of the antenna base Place the lock washers over the U bolt and hand thread the nuts on the bolt Tighten the nuts securely with the 7 16 open...

Страница 8: ...Cutting measurements for tuning between 50 and 54 Mhz FREQUENCY RADIATOR LENGTH CUT LENGTH 50 Mhz 54 3 4 INCHES 0 INCHES 51 Mhz 52 7 8 INCHES 1 7 8 INCHES 52 Mhz 51 INCHES 3 3 4 INCHES 53 Mhz 49 1 8 I...

Страница 9: ...the coax 3 to 4 from the mast for 50 Use an insulator PVC pipe if necessary Below the 50 air spaced length tape the coax to the mast and keep the coax taped against the mast for at least three feet TE...

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