Theory of operation overview the dec001 is designed to be an addon to the mfj 259b, mfj 259c, mfj 269, mfj 269c, swr584b and swr584c. Mfj269c pro is very similar to the mfj269c, but has its uhf range coverage 430 to 520 mhz and an extended commercialstyle cabinet for lab work helps protect knobs and connectors from damage. Mfj enterprises inc,ameritron,hygain,hygain,cushcraft,vectronics,mirage,mfj,mfj enterprises,antenna,radio,ham radio,amateur radio,tuner,analyzer,starkville,amplifier. I would get different reading with my external antenna tuner and the built in swr in the radio. At this point i dont have any faith in the readings. It is mounted inside the unit and has 7 wired connections to the main pc board. Hsms2820 surface mount rf schottky barrier diodesdetector diodes d1d4 on mfj259 schematic msa0611 bipolar monolithic microwave integrated circuit mmic mmbfj310 njfet rf ampq1q2 differential amp and others. The mfj269 rf analyzer is a compact battery powered rf impedance. Mfj 259 antenna analyzer calibration, problems, and service. Modify your amateur radio to get better performance, or more functions. Typical residential heights usually result in minimum swr readings below 1. This calibration procedure is the correct procedure for later mfj259bs. About mfj 259b calibration the resource is currently listed in in a single category.
Mfj enterprises inc,ameritron,hygain,hygain,cushcraft,vectronics,mirage, mfj, mfj enterprises,antenna,radio,ham radio,amateur radio,tuner,analyzer,starkville,amplifier. It features a large easytoread two line lcd display and sidebyside meters. The manual was written in by mfj and applied to mfj249. This calibration procedure is the correct procedure for later mfj 259bs.
Mfj 259c calibration issues so, im winding toroidal cores to make a series of 3 pole butterworth band pass filters for field day. Mar 25, 2015 i show you how to use an mfj 259 269 antenna analyzer to check your antenna for swr and resonance. I noticed my mfj269 analyzer impedance readings are way out. About mfj259b calibration the resource is currently listed in in a single category. Resistance r and reactance x or magnitude z and phase degrees. Technical resource and information on mfj 259 antenna analyzer. May 30, 2015 hsms2820 surface mount rf schottky barrier diodesdetector diodes d1d4 on mfj 259 schematic msa0611 bipolar monolithic microwave integrated circuit mmic mmbfj310 njfet rf ampq1q2 differential amp and others.
Mfj259c calibration issues so, im winding toroidal cores to make a series of 3 pole butterworth band pass filters for field day. This is an mfj procedure that does not contain any information that would not be handed out by them. I show you how to use an mfj 259269 antenna analyzer to check your antenna for swr and resonance. Since mfj 259b firmware has several versions under the same model number, you may find some final performance or function verification steps invalid. This site is for hams there want all the best from his radioamateur equipment. Mar 29, 20 heres how to adjust a transmatch or antenna tuner to a particular transmitting frequency using an mfj antenna analyzer. For simple handheld analyzers like the mfj269cpro, the calibration plane is always located at the. It took awhile to learn how the analyzer worked and piece together information from the available schematics and instructions, some of which did not cover the 269 c model. So far no one has rated yet, so be the first to rate this link. An initial pcb precalibration procedure is assumed the operations indicated in the procedure can be followed under normal conditions. When the unit is switched on, an internal test is carried out and the battery supply voltage is shown on the display. Mfj 259 out of production mfj 259b out of production.
The mfj269c also functions as a nonprecision signal source and frequency counter. Select the desired frequency range and adjust the tuning control for desired test frequency frequency is displayed on the lcd screen. This short article is intended to help others who experience the same problem i had with my mfj269 antenna analyzer. Mfj 259 antenna analyzer calibration, problems, and. Mfj926b hf automatic remote antenna tuner instruction manual 2010 mfj enterprises, inc. Mfj 269 cal proc and schematic john, attached is the cal procedure and schematic for the mfj 269. Page 10 mfj259c instruction manual hfvhf swr analyzer note that the mfj259c also has advanced antennameasurement modes that are described in section5.
System resolution is limited mostly by diode linearity, calibration stability, and external. Not only did they send me a replacement for the damaged board, they sent me both boards complete with all components. Ive used several calculators online to ensure that the number of turns are correct for the t686 cores that im using. Mfj269 cal proc and schematic john, attached is the cal procedure and schematic for the mfj269. After getting some schematics and ruff calibration instructions off the internet, i was able to bring the device back into a useable instrument. The following is a description of the basic opening or default menu used by the mfj 269c. An initial pcb pre calibration procedure is assumed. It will not win a beauty contest but it keeps the unit protected. The operating frequency range of this unit extends from 1. These connections are made using the mfj header 8 position connector shown.
The manual were called as calibration procedure guide. The operations indicated in the procedure can be followed under normal conditions. Mfj 269c pro rf analyzers mfj269cpro free shipping on most. Mfj 269c pro rf analyzers combine five basic circuits. Large easytoread two line lcd display and sidebyside meters clearly display your information builtin nicadni. Although it has its limitations with impedance analysis and tracking errors. This link is listed in our web site directory since wednesday may 20 2015, and till today mfj259b calibration has been followed for a total of 504 times. Mfj 1896 manualr2 mfj enterprises, inc agrees to repair or replace at mfj s option without charge to the original owner any. Listed under the radio equipmentantenna analyzersmfj259b. For calibration instructions, click here it is a pdf download. Mfj mfj249 calibration procedure guide device manuals. Mfj 259c instruction manual hfvhf swr analyzer 4 1. Mfj 269c pro rf analyzers mfj269cpro free shipping on. Your analyzers calibration plane is the point of reference where all measurements have greatest accuracy gain reference 0db and phase shift 0 degrees.
Mfj 269c pro is very similar to the mfj 269c, but has its uhf range coverage 430 to 520 mhz and an extended commercialstyle cabinet for lab work helps protect knobs and connectors from damage. Follow the procedure outlined below for measuring swr. However, unless you have a strong working knowledge of rf systems, you may find these added modes of limited value. This short article is intended to help others who experience the same problem i had with my mfj 269 antenna analyzer. This switch must be in the up or in the off position unless uhf operation is intended. The box can be tested completely after assembling with the battery holder. Mfj mfj269 have 2 pdf manuals in english mainly including calibration procedure guide, instruction manual.
Listed under the radio equipmentantenna analyzers mfj 259b category that is about mfj 259b. An initial pcb precalibration procedure is assumed the operations indicated in the. Mfj suggested i do a calibration or send it to them for a calibration 8 week turnaround. It includes all the features of the mfj 259b, the worlds most popular swr analyzer plus much more. Used in conjunction with other buttons for changing functions in the mfj926b. Since mfj259b firmware has several versions under the same model number, you may find some final performance or function verification steps invalid. Applications to 520 mhz allow operations through many. This link is listed in our web site directory since wednesday may 20 2015, and till today mfj 259b calibration has been followed for a total of 504 times. Mfj 259c instruction manual hfvhf swr analyzer the height of a dipole above ground, as well as any surrounding objects, will influence the feed point impedance and swr.
It includes all the features of the mfj259b, the worlds most popular swr analyzer plus much more. The mfj 269c also functions as a nonprecision signal source and frequency counter. Read the vswr and impedance from the two analog meters or the lcd display. Heres how to adjust a transmatch or antenna tuner to a particular transmitting frequency using an mfj antenna analyzer. If the line is 50 ohms or the impedance selected in advanced mode 3, this unit will always display the feedlines true swr, with the exception of a reduction in swr present in feedlines having appreciable loss. Mfj mfj 269 have 2 pdf manuals in english mainly including calibration procedure guide, instruction manual. This information is here only because it is the correct way to calibrate the mfj 259b analyzer. Batteries last quite a while despite what i read about it in the past. Either battery or external power supplies can be used to power the analyzer, and the mfj 269 can. Page mfj269 instruction manual hfvhfuhf swr analyzer the antenna and the mfj269. The drawing legend indicates that its for the 269, but like your 259 schematic, its hard to read. Mfj269 antenna analyzer theory and use the mfj 269 is a handy instrument for checking your antenna, test coax, or to even test tuners.
For basic handheld units like the mfj 259c, the calibration plane is always fixed at the analyzers rf connector. It is easyaccess to a test procedure, that is all it is. The main category is mfj259b antenna analyzer that is about mfj259b. Mfj 249 antenna analyzers sch service manual download. Theory of operation overview the dec001 is designed to be an addon to the mfj259b, mfj259c, mfj269, mfj269c, swr584b and swr584c. Calibration control manual ape software calibration software. The mfj269 is the fullyfeatured descendent of the earlier and. Mfj 259b analyzer calibration this is an mfj procedure that does not contain any information that would not be handed out by them. Introduction the box can be tested completely after assembling with the battery holder initially unassembled. I own a aa600 as well but still use the 269 from time to time.
Mfj 259c may, or may not have the same cal procedure as the 259b part 3. They perform a wide variety of useful antenna and rf impedance measurements, including coaxial cable loss and electrical distance to an open or short. As you can see, the mfj269c pro vides good swr correlation at the three frequencies, as well as reason ably accurate impedance measure ments at 50 mhz. Your meter may differ and i cant vouch for the calibration of my meter which. Page 26 coaxial lines can lay in a pile or coil on anything, including a floor. Calibrating the mfj259b antenna analyzer resource detail. I replaced the damaged board, soldered everything up and voila, working wattmeter and dummyload. When the power is off, the tuner is placed in bypass mode and antenna is selected. There is a calibration procedure available, and one for the 259259b as well from the original designer, but note that the 259 has 8bit adcs so the hex values displayed on the 269 and the pot numbers dont match this page still it is a useful read and the document on the mfj site seems to match the general guidelines when you convert to 12.