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MFJ All Band Doublet                                                             Instruction Manual 

This antenna is constructed of heavy duty materials and should withstand 
normal climates for many years. General Electric makes a pure silicone grease 
called "

silicone dielectric compound

" that can be applied 

sparingly

 

to the 

soldered connections at the antenna’s center insulator. 

This is the same type of 

sealer that commercial antenna installers and CATV companies use with 
great success

  
A less desirable but adequate sealer is the automobile seam sealer commonly 
marketed as "coax seal".  This is a pliable black sealing compound. 

TECHNICAL ASSISTANCE 

 
If you have any problem with this unit first check the appropriate section of this 
manual.  If the manual does not reference your problem or your problem is not 
solved by reading  the manual you may call 

MFJ Technical Service

 at 

662-323-

0549

 or the 

MFJ Factory

 at 

662-323-5869

.  You will be best helped if you have 

your unit, manual and all information on your station handy so you can answer 
any questions the technicians may ask. 
 
You can also send questions by mail to MFJ Enterprises, 300 Industrial Park 
Road, MS 39759; by FAX to 

662-323-6551

; or by email to 

[email protected].  Send a complete description of your problem, an 
explanation of exactly how you are using your unit, and a complete description 
of your station. 

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