MFJ MFJ-266B Instruction Manual Download Page 23

MFJ-266B HF/VHF/UHF Antenna Analyzer 

Instruction Manual  

 

12 MONTH LIMITED WARRANTY 

MFJ Enterprises, Inc. Warrants to the original owner of this product, if manufactured by 
MFJ  Enterprises,  Inc.  and  purchased  from  an  authorized  dealer  or  directly  from  MFJ 
Enterprises, Inc. to be free from defects in material and workmanship for a period of 12 
months from date of purchase provided the following terms of this warranty are satisfied. 

1.

 

The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, 
credit  card  or  money  order  receipt,  etc.)  describing  the  product  to  establish  the 
validity  of  the  warranty  claim  and  submit  the  original  or  machine  reproduction  of 
such  proof-of-purchase  to  MFJ  Enterprises,  Inc.  at  the  time  of  warranty  service.  
MFJ  Enterprises,  Inc.  shall  have  the  discretion  to  deny  warranty  without  dated 
proof-of-purchase.  Any evidence of alteration, erasure, or forgery shall be cause to 
void any and all warranty terms immediately. 

2.

 

MFJ Enterprises, Inc. agrees to repair or replace at MFJ’s option without charge to 
the  original  owner  any  defective  product  under  warranty,  provided  the  product  is 
returned  postage  prepaid  to  MFJ  Enterprises,  Inc.  with  a  personal  check,  cashiers 
check, or money order for $12.00 covering postage and handling . 

3.

 

MFJ  Enterprises,  Inc.  will  supply  replacement  parts  free  of  charge  for  any  MFJ 
product  under  warranty  upon  request.    A  dated  proof-of-purchase  and  an  $8.00 
personal check, cashiers check, or  money order  must be provided to cover postage 
and handling. 

4.

 

This  warranty  is  NOT  void  for  owners  who  attempt  to  repair  defective  units.  
Technical consultation is available by calling (662) 323-5869. 

5.

 

This  warranty  does  not  apply  to  kits  sold  by  or  manufactured  by  MFJ  Enterprises, 
Inc. 

6.

 

Wired and tested PC board products are covered by this warranty provided only the 
wired and tested PC board product is returned.  Wired and tested PC boards installed 
in  the  owner’s  cabinet  or  connected  to  switches,  jacks,  or  cables,  etc.  sent  to  MFJ 
Enterprises, Inc. will be returned at the owner’s expense unrepaired. 

7.

 

Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to 
person or property by the use of any MFJ products. 

8.

 

Out-of-warranty  Service:  MFJ  Enterprises,  Inc.  will  repair  any  out-of-warranty 
product  provided  the  unit  is  shipped  prepaid.    All  repaired  units  will  be  shipped 
COD  to  the  owner.    Repair  charges  will  be  added  to  the  COD  fee  unless  other 
arrangements are made. 

9.

 

This warranty is given in lieu of any other warranty expressed or implied. 

10.

 

MFJ Enterprises, Inc. reserves the right to make changes or improvements in design 
or manufacture without incurring any obligation to install such changes upon any of 
the products previously manufactured. 

11.

 

All MFJ products to be serviced in-warranty or out-of-warranty should be addressed 
to  MFJ  Enterprises,  Inc.,  300  Industrial  Park  Road,  Starkville,  Mississippi  39759, 
USA  and  must  be  accompanied  by  a  letter  describing  the  problem  in  detail  along 
with a copy of your dated proof-of-purchase. 

12.

 

This warranty gives you specific rights, and you may also have other rights, which 
vary from state to state. 

Summary of Contents for MFJ-266B

Page 1: ...UTION Read All Instructions Before Operating Equipment MFJ ENTERPRISES INC 300 Industrial Park Road Starkville MS 39759 USA Tel 662 323 5869 Fax 662 323 6551 COPYRIGHT 2012 MFJ ENTERPRISES INC C Model...

Page 2: ...mer regulations technical manuals documents positional handbooks or other official publications The copy of this manual provided to the customer will not be updated to reflect current data Customers u...

Page 3: ...d Accuracy 7 5 4 Calibration Plane Error 8 5 5 Sign Ambiguity j 8 6 0 Antenna Measurements 9 6 1 Antenna Connectors 9 6 2 SWR 9 6 3 Measuring SWR 9 6 4 SWR Bandwidth and Resonance 10 6 5 Antenna Tunin...

Page 4: ...o generates a 2 dBm RF signal that may be used to check receivers networks amplifiers and antenna patterns Operating range is HF 1 5 71 MHz in six HF bands VHF 85 185 MHz continuous coverage UHF 300 4...

Page 5: ...cells Slide and Lift When replacing old batteries be sure to follow the manufacturer s environmental guidelines for safe disposal For longest battery life always replace with a matched set of factory...

Page 6: ...ctor s center pin 2 1 mm Important Warnings Reverse polarity or excessive voltage could permanently damage the MFJ 266B To avoid damage 1 Never connect an AC transformer or positive ground power sourc...

Page 7: ...z frequency counter Note that the BAND SELECT switch B must be up in the HF position for the counter mode to activate If switch B is down an error message will prompt you to change the band setting to...

Page 8: ...e This signal is a 2 dBm continuous carrier When using the analyzer as a signal source the operating range band and frequency are selected in the normal manner and will be displayed on the screen see...

Page 9: ...Follow the up down position prompts shown in the table printed next to the buttons to select ranges A B BAND SELECT BAND A B HF X VHF UHF Counter X X means the VHF UHF switch can be in either position...

Page 10: ...the time the unit s built in stimulus generator is powerful enough to overcome any lack of front end selectivity and override stray pickup However a powerful transmitter located nearby could inject en...

Page 11: ...measure with the analyzer is the same SWR the radio will encounter when connected However if you wish to know the antenna s actual feedpoint SWR for documentation purposes the analyzer should be conne...

Page 12: ...g PL 259 connectors above 2 Meters because they may contribute significant mismatch to your measurements Finally when installing N male connectors on patch cables and feedlines pay close attention to...

Page 13: ...ng with minimum SWR and minimum SWR frequency is often included on antenna specification sheets Note that minimum SWR is sometimes wrongly confused with resonant frequency The technical definition for...

Page 14: ...tuner ATU should be installed The MFJ 266B may be used in conjunction with the tuner to make adjustments without the need to transmit test signals over air Simply connect the analyzer to the tuner in...

Page 15: ...ype baluns work best because they have higher power handling capability and less loss than other types An effective current balun could be as simple as a few loops of coax taped together at the feedpo...

Page 16: ...e rated power level over the analyzer s frequency range Second harmonic suppression averages 20 dBc A quarter wave stub or low pass filter may be installed if greater harmonic suppression is required...

Page 17: ...or approaching self resonance at the stimulus frequency will trigger the L XL 1 5K message and will be un measurable Try to re measure at a lower frequency 7 6 Tuning a Wave or Wave Coaxial Stub To ac...

Page 18: ...cy to find the free space 1 4 wavelength in feet L 246 f MHz 6 Divide 9 actual length by free space 1 4 wavelength to get the Velocity Factor VF 9 L Note that there is nothing magical about the 9 foot...

Page 19: ...nnect the input unbalanced side of the balun to the analyzer s antenna connector Connect a center tapped resistive load to the balanced side R1 R2 25 for 1 1 baluns R1 R2 100 for 4 1 baluns Using the...

Page 20: ...yzer Check Supply Voltage Press Down button for Counter Mode Up button for Antenna Analyzer Mode Counter Mode Screen Fg f 010 000 MHz REF FS 100mV Set Gate Speed Up Fast Down Slow Incoming Signal Freq...

Page 21: ...ating Range A B BAND SELECT BAND A B HF X VHF UHF Counter X HF 1 5 71 MHz VHF 85 185 MHz UHF 300 490 MHz 2 Press Up Down to Select HF Band BAND MODE SELECT Up Down ANT Counter Bk Lite Tap to STEP thro...

Page 22: ...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...

Page 23: ...er must be provided to cover postage and handling 4 This warranty is NOT void for owners who attempt to repair defective units Technical consultation is available by calling 662 323 5869 5 This warran...

Page 24: ...MFJ 266 Manual Version 1D 300 Industrial Park Road Starkville MS 39759...

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