Table of Contents
Features ............................................................................................................1
Introduction........................................................................................................2
Installation .........................................................................................................3
Power......................................................................................................3
Keying Output.........................................................................................3
Keyboard ................................................................................................3
Iambic paddle .........................................................................................3
Lithium Battery Removal and Installation ..........................................................3
LCD Contrast Adjustment..................................................................................4
Basic Operation.................................................................................................4
Keyboard Operation ..........................................................................................4
Paddle Operation...............................................................................................5
Adjusting Code: Speed, Weight, And Tone.......................................................6
Code WPM Speed (F10) ........................................................................6
Weight (W)..............................................................................................6
Sidetone Frequency (T)..........................................................................6
Message Memories...........................................................................................7
Embedded Commands...........................................................................7
Typical Settings for a Contest............................................................................8
Code Practice Utilities .......................................................................................8
QSO Simulator........................................................................................8
FCC Exam Simulator..............................................................................8
Random Word Generator .......................................................................8
Random Code Generator .......................................................................9
Learning Code with the Random Code Generator ............................................9
Teaching Code .......................................................................................9
Entering Commands..........................................................................................10
MFJ-498 Instruction Manual
MFJ-498 Display Keyboard Keyer
Features
Memories:
Eight independent 4000 character message memories.
32 Character Liquid Crystal Display:
The MFJ-498 has a 32 character display on which memories, simulations, and
keyboard entered text may be viewed.
Type Ahead Buffer:
The MFJ-498 has a 150 character type ahead buffer with audible "buffer full"
warning.
Built-In Iambic Keyer:
Using the paddle jack makes the MFJ-498 a keyboard controlled iambic keyer.
Embedded commands:
Auto-incrementing serial numbers, Timed pauses to 99 minutes 99 seconds,
Message loop.
Adjustable Parameters:
Code speed is variable from 5 to 100 WPM, weight varies from 5 to 95 %.
Sidetone Speaker:
Internal sidetone speaker with adjustable volume and frequency.
Morse Code Trainer:
Random code generator with 5 character or random 1-8 character length
words. Random characters are selectable from alphabetic, numeric, prosign,
and punctuation types; or specific 6 character sets.
Random Word Generator:
Sends from a database of many common words used in amateur radio.
FCC Exam Simulator:
Sends a random QSO, just like an FCC code test.
QSO Simulator:
Simulates "real" contacts with the keyer to practice on-the-air operation by
calling or answering CQ.
Keying Modes:
MFJ-498 Instruction Manual
Introduction
The MFJ-498 Display Keyboard Keyer is a powerful tool for the radio amateur. The
MFJ-498 functions as a contest keyer with 8 memories, a code teaching and practice
tool with 4 separate methods of learning, from beginner to expert, and a display
keyboard keyer, all code being sent or stored with the keyboard is displayed on the
32 character LCD. The MFJ-498 is also a powerful iambic keyer with all paddle code
parameters conveniently controlled by the keyboard interface.
The MFJ-498 has eight 4,000 character message memories which can be loaded by
keyboard. When saving a message embedded commands can be inserted that
repeat the message continuously, insert timed pauses within the message, and
insert an auto-incrementing serial number. Embedded commands allow your keyer
to perform contest, foxhunt or beacon operation.
The MFJ-498 has controls for speed and volume on the front of the unit. The paddle
jack connects to any iambic or single lever (dual contact) key paddle. The keyboard
port allows use of the AT compatible keyboard for keyboard keying operation. The
MFJ-498 has both Direct and Grid-Block outputs.
MFJ-498 Instruction Manual
Installation
Power
The MFJ-498 Morse Keyboard requires a 12 VDC 500 milliamp power supply. The
power jack accepts a 2.1 mm coaxial plug with the center conductor positive and
shield ground. An optional DC supply, the MFJ-1315, is available from MFJ
Enterprises. Connect your MFJ-1315 Power Adapter or compatible DC supply into
the jack marked POWER on the MFJ-498 back panel.
Keying Output
This unit supports both positive and negative keyed radios. The MFJ-498 has both
Direct or Grid Block outputs. Use the Direct output for a positive keyed radio (most
solid state radios). Use the Grid Block output for a negative keyed radio (most
radios with tube finals). Use a standard shielded RCA cable between your radio key
input and to either the Direct or Grid Block key output.
Keyboard
The MFJ-498 is supplied with an IBM-AT compatible keyboard. The MFJ-498X
package does not include a keyboard. The unit is guaranteed to support the
supplied keyboard but may be used with other standard 101 key AT-style keyboards.
However, the use of an AT-compatible keyboard from other manufacturers may
cause an increase in susceptibility to radio frequency interference.
If using a switchable keyboard, move the A-X switch on the back of the keyboard to
the "A" position. Using an XT style keyboard or turning a switchable keyboard
to "X" mode may damage both the keyboard and the MFJ-498. This unit will
function only with AT compatible keyboards. Plug the keyboard into the 5 pin
DIN connector marked KYBRD IN on the MFJ-498.
Iambic paddle
An iambic or single lever (dual contact) paddle
connects to the 1/4" stereo phone jack with a
shielded cable through the back of the unit.
Connect the dot wire of the paddle to the ring on
the plug and the dash wire to the center conductor.
The shield on the plug should be attached to paddle ground.
MFJ-498 Instruction Manual
LCD Contrast Adjustment
The MFJ-498 has a contrast adjustment pot accessed through the case on the left
side. Insert a small screwdriver or flat tuning tool into the pot and turn to adjust the
LCD viewing angle. The LCD will widen the viewing angle as you turn clockwise or
close the viewing angle as you turn counter-clockwise.
Basic Operation
The MFJ-498 is simple to operate. After turning the unit on, it will send the
characters "ON" in Morse code over the sidetone speaker and display "MFJ-498
Display Keyboard Keyer" on the LCD. This tells you the MFJ-498 is ready for
operation.
Start sending with a paddle or keyboard. Adjust the volume and speed to your
preference. If the speed is still too fast or too slow, adjust the range of the speed
knob by pressing F10. See Adjusting Code on page 6.
All characters or code sent by the user are played on the sidetone speaker This
allows the user to hear what he is keying or typing.
Only when the keyer is used with a paddle is the code sent as soon as it is keyed.
When using the keyboard you may type ahead of the code that is being transmitted.
This allows you to enter words and phrases faster than the transmitted code. The
buffer permits smoother code with less pauses. You can fix misspelled words and
think about your next sentence while the previous sentence is being sent.
When you are entering commands or saving memories the key outputs are disabled.
This keeps all erroneous code off of the air.
Keyboard Operation
The keyboard on the MFJ-498 is like that of a computer, not like a typewriter. A key
is pressed and immediately released. If a key is held down, a character will be
repeated until the key is released. To make word breaks press Space Bar. Press
Space Bar several times to make a longer break.
MFJ-498 Instruction Manual
pressed. These characters are lost and will not display on the LCD. As code plays
the buffer will empty and eventually the bottom line will catch up with the top.
AAA
MIM
WG
DN, IMI, DU
HH, AL, SX, KA
KN, KK
AA
MFJ-498 Instruction Manual
Pressing the backspace key will remove a single character from the "type ahead"
buffer before it is played. While the buffer is being sent you may clear it by pressing
Esc. The buffer will clear, all text in it will be lost, and the keyer will stop playing
code. Now you may enter new text or play a stored message.
If you press Pause while your type ahead buffer is playing your message will stop
playing. You can now insert text with the paddle. Press Esc and your type ahead
buffer will continue playing where it stopped.
Prosigns
The following prosigns are assigned to keyboard characters:
, AF,
and AL. See Page 16 for a complete chart showing keyboard assignments. To
create prosigns not included on the keyboard, use the Alt key. The MFJ-451
produces prosigns by removing the intercharacter spaces from characters of keys
while the Alt key is pressed.
ex: To produce the prosign
release Alt
Message Memories [F1-F8]
The function keys F1 through F8 are used to store and send messages. The Alt key
is used with a function key to store a message. The function key is then used alone
to send the stored message. See the Message Memories section for more details.
Command Mode (F9)
The command mode is accessed by selecting the F9. This selection is followed by a
one-character keyboard command.
Code WPM Speed (F10)
To change code speed use the F10 key. The speed can then be varied using the up
and down arrow keys or direct two-character entry. Press ESC to exit. See
Adjusting Code on page 6.
Output Tune (F11)
An output tune is activated by selecting F11. A constant key is sent to the antenna
, IQ, BT, AR, SN,
(.-.-) hold the Alt key down, press A twice, then
, K, AS, SK,
,
, KR, OS,
,
MFJ-498 Instruction Manual
in the hand key mode. While in the hand key mode all other features of the MFJ-498
are disabled. The speed, weight, and tone for paddle operation is the same as that
for the keyboard.
The iambic paddle has a unique feature that the single lever paddle does not have.
The two key paddles are independent and can be squeezed together. When both
the dot and dash contacts touch ground, the MFJ-498 sends alternating sending
code elements, ".-.-" or "-.-.". This is called iambic keying.
Iambic keying has two modes: A and B. In iambic B mode. the keyer will send an
extra alternating element when you release both paddles. In iambic A mode, no
extra elements are sent. The iambic paddle modes, A and B, are selected with the
"I" and "B" commands. See the "Entering Commands" section on page 10.
Adjusting Code: Speed, Weight, And Tone
NOTE: While changing parameters or loading memories, the MFJ-498 disables the
output key so that erroneous code is not sent over the air.
Code WPM Speed (F10)
Code speed is set using the front panel control and the F10 key. The front panel
control changes the wpm speed range while the "F10" key changes speed within that
range. If you cannot set the speed high or low enough with "F10" you must change
the range with the front panel control. When the front panel control is fully counter-
clockwise the speed range is from 5-24 wpm. When the front panel control is fully
clockwise the speed range is from 24-100 wpm.
When you press "F10" the MFJ-498 sends a series of dot-dashes over the sidetone
speaker to indicate the current speed. There are two methods to change code
speed. The up and down arrow keys can be used to vary the speed gradually. Code
speed can also be set to an approximate words-per-minute by pressing two numbers
(i.e., 05 or 13). The speed will then change automatically. When you have found a
speed that is comfortable for you, hit the "Esc" or "Enter" key.
Weight (W)
Weight is set with "F9 to enable command mode and press "W". After pressing "W",
MFJ-498 Instruction Manual
To adjust sidetone frequency, press "F9" to enable command mode and press "T".
The unit will sound the present tone setting. Use the up and down arrow keys to
increase or decrease the sidetone setting. Note that the tone will not affect your
transmitted signal, only the sidetone speaker frequency changes. When you have
found a tone setting that you like, press either "Esc" or "Enter" to exit the tone
change mode.
MFJ-498 Instruction Manual
Message Memories
The MFJ-498 has eight 4000 character message memories. Each memory is
represented by a function key, "F1-F8". To play a message simply press a function
key.
To record a message to memory, press and hold the "Alt" key while selecting a
memory position. When the MFJ-498 signals the characters "--. ---" or "GO" in
Morse, it is ready to record the message, which is displayed on the bottom line of the
LCD readout as it is typed. At approximately 16 characters before the message
memory fills, the playback frequency lowers to indicate that memory is short.
Characters may be removed from memory by using the "Backspace" and new
characters may be entered. No more than 4000 characters may be stored in any
message location. Any attempt to enter additional characters will generate a long,
low-frequency tone for each character entered. To complete the saving of a
message, press "Enter". An end of message character (.-.-.) will sound to confirm
the save.
A programmed message can be replayed by pressing the appropriate function key
"F1-F8". The keyer will display a lower case character on the top line of the display
to indicate which message is sent. The character "a" is displayed for message 1,
"F1"; "b" for message 2, "F2"; "h" for message 8 .
example: Select "Alt-F2". The keyer signals "--. ---" to indicate readiness. Type the
message "AA5MT BEACON BEACON 5 W BEACON." Press "Enter" and the
message is stored at memory location "F2". Select "F2" to play message.
Embedded Commands
While a message is being saved, one or more embedded commands may be
added as special features.
Note: To use the "Ctrl-L" command, press and hold Ctrl, press and release the
"S" key, then release the Ctrl key.
Ctrl-L creates a repeating message. Use the "Ctrl-L" at the end of the message
before pressing "Enter". The MFJ-498 will play the message to the point
where "Ctrl-L" is entered an then repeat.
example: AA5MT BEACON 5 W "Ctrl-L Enter". This message repeats until
MFJ-498 Instruction Manual
for nine and a "T" for zero. A new serial number may be stored by selecting
"F9" to enable the command mode and then pressing "S" followed by four
numbers in a "xxxx" format. Pressing "F12" will decrement the serial number
and the keyer will echo "D" for every decrement.
example: YOU ARE CONTACT NR Ctrl-S Enter
Typical Settings for a Contest
This is an example of some typical settings for a contest. Each contest has different
rules for exchanges etc. and you may have a different method of contesting. This is
an example of one contester's settings.
Memory #1: CQ TEST DE W8JI W8JI W8JI TEST
Memory #2: TEST W8JI W8JI
Memory #3: UR 5NN SN Ctrl-S OH DE W8JI
Memory #4: R 73 TEST W8JI
Memory #1 is set for CQ at slow periods or at the end of a contest when most
stations have already been worked.
Memory #2 is set for busy times when contacts are plentiful. This memory is set with
a simple quick message. A listener will immediately know who is calling and what
they want. A contester would not spend much time listening to this station if they
have already worked it.
Memory #3 is set with the contest exchange. It gives the serial number and some
other contest information. Any contest's exchanges can be inserted here.
Memory #4 is set to close a QSO and announce that you are ready for another
contact.
Code Practice Utilities
There are four code practice utilities built into the MFJ-498: the QSO simulator, the
FCC exam simulator, the random word generator, and the random code generator.
Each is accessed by entering the appropriate character in the command mode.
QSO Simulator
MFJ-498 Instruction Manual
The FCC Exam sends a QSO text just like in a real exam. After you enter "E" you
will hear traffic between two stations in a simulated QSO. Use this feature to
reinforce your copy or to study for your code test.
Random Word Generator
The random word generator sends words from the data base for the QSO and FCC
exam simulators. Using this feature improves your word recognition. Press F9 and
"Z" to start.
MFJ-498 Instruction Manual
Random Code Generator
The random code generator is designed to teach the beginner the Morse alphabet.
Enter "R" in the command mode to start the code generator.
The random code generator can be configured in two ways. When "C" is "on", the
keyer sends fixed sets of characters and punctuation. Use the command mode and
"1"-"9" to choose a set. Refer to the table on page 13. When "C" is "off", the keyer
sends alphabetic, numeric, prosign, or punctuation characters. Use the command
mode and "APNG" to enable any or all character types to be sent. The keyer's
default is "C" "off", 5 character words with alphabetic type characters. To study a
group of individual characters, select "C" to choose a fixed character set and then
select a fixed group "1" through "9". The default set is "1" (A-F).
When you are setting your keyer up for code practice, remember to use "F9" "Q" to
see which commands are selected.
Note that when "C" is "off" and "APNG" are also all set to "off", the keyer is not able
to start the random code generator!
MFJ-498 Instruction Manual
Learning Code with the Random Code Generator
This is an example of a typical code practice session. We will work first on the letters
A-F in Farnsworth mode so that you will learn the sound of each character at a high
speed.
Press "F9" and type 'F'. This enters Farnsworth mode.
Press "F9" and type 'C'. This selects the fixed character sets.
Enter '1' in the Command Mode to choose the A-F character set. The default
settings are set to fixed 5 character length.
Now adjust the code speed by pressing "F10" and typing '05'. This sets word
spacing to 5 words per minute while character speed is set to 18 words per minute
(Farnsworth). Hit ESC or ENTER.
Get ready to copy. Press "F9" and type 'R'.
While you take copy you may notice that the characters being sent are also
displayed on the LCD. The characters are there only for reference and should not
be read during a code practice session unless it is just occasionally.
When you get to a stopping point press "ESC" to end the session.
After you have practiced the A-F set you can move to the next set by pressing "F9"
and typing '2' to select G-L.
Teaching Code
Those that give practice sessions will find the MFJ-498 of great help. The MFJ-498
can be taken to the classroom and give several sessions of practice. The code sent
is always perfect and can be modified to whatever method of teaching one prefers.
MFJ-498 Instruction Manual
Entering Commands
During normal operation, the F9 key is used to enter the command mode. When the
command mode has been enabled, the keyer responds by signaling "CO". The unit
is now ready to receive one of the available one-character commands listed below
through the keyboard or paddle. The keyer responds to an invalid entry by returning
to normal mode.
A Enables, "on", or disables, "off", alphabetic characters when the "C" option is
"off" and using the random code generator.
B Use Iambic A or B to toggle between the iambic A and iambic B modes. The
keyer responds with the current mode "A" or "B". Iambic modes A and B work
when you squeeze both paddles together. See "I", Iambic On/Off. In iambic
B mode the keyer plays the alternating element after the paddles are released
during an element. Iambic A mode does not produce an alternating element
when the paddles are released during an element. For example, a release
during the dash in ".-" produces ".-" or "A" in iambic a mode but produces ".-."
or "R" in iambic b mode.
C When "C" is "off" the random code generator sends character types:
alphabetic "A", numeric "N", prosigns "G", and/or punctuation "P". When "C"
is "on" the random code generator sends fixed character sets "1 - 9". See the
A, N, G, P, and # commands.
E The "E" option starts the FCC exam simulator. The exam simulator give an
FCC style exam for practice. You will hear QSOs between 2 random
simulated stations.
F This command toggles the Farnsworth mode in the random code generators.
When in Farnsworth mode character speed is set to 18 WPM while the overall
word speed remains at the keyer's current setting. If the keyer is set to 5
WPM in Farnsworth mode, it will send characters at 18 WPM while inserting
extra word-break and inter character timing to maintain an effective speed of 5
WPM. This feature makes beginners learn Morse characters by sound rather
than by counting dots and dashes.
G Enables, "on", or disables, "off", prosign characters when the "C" option is
MFJ-498 Instruction Manual
I Toggles the Iambic mode. The keyer responds with the current mode "ON" or
"OFF". Iambic mode allows you to squeeze both paddles and get alternating
dashes or dots. When "off" the keyer does not alternate dots and dashes
during a squeeze, it plays whichever side made contact first until it is released.
See "B", Iambic A or B.
L Toggles 5-character word length or random word length from 1 to 8
characters. The keyer signals "OK" after the command is entered. The
keyer's default setting sends 5 character words.
N Enables, "on", or disables, "off", numeric characters when the "C" option is
"off" and using the random code generator.
O Use "O" to disable the key output. The keyer responds with the current mode
"ON" or "OFF". If the output is turned "off", signals are not sent to the keyer's
gridblock or direct outputs allowing practice operation. The output is
automatically disabled during memory message storing, command mode
operation, status information, and keyer setup.
P Enables, "on", or disables, "off", punctuation characters when the "C" option is
"off" and using the random code generator.
R This command is used to start the random code generator after the code
generator-defaults have been set ( see F, L, N, P, G, A, and C ). Press Esc
to exit the code generator.
S This command is used to store a new serial number. After entering "S" the
new serial number should be entered. A serial number is four digits in length,
and can range from 0000 to 9999. Press Enter after the fourth character.
T This command is used to set the frequency of the sidetone speaker with the
keyboard by using the up and down arrows to vary sidetone. Press Esc to
exit.
U Use the Semi-auto command to enable the semi-auto (bug) mode. The keyer
responds with the current mode "ON" or "OFF". Semi-auto mode creates
automatic dots but requires dashes to be hand keyed.
MFJ-498 Instruction Manual
X Use "X" to disable the sidetone speaker audio. The keyer responds with the
current mode "ON" or "OFF". If the sidetone is disabled, it will still play
command messages and status information.
Z Starts the random word generator. After entering "Z" the MFJ-498 will start
sending random words that are from a built-in database of frequently used
words on the air. Examples are words like radio, antenna, VHF, TNC, and
computer.
MFJ-498 Instruction Manual
0(zero) Starts the QSO simulator. Use the interactive QSO simulator to practice on
the air contacts. Learn code the way that is used on the air. After you enter
"0" in the command mode you may send CQ and the keyer will answer you. If
you wait without sending CQ, the keyer will initiate the QSO and you can
answer it.
#(1-9) A one-digit entry between 1 and 9 is entered to choose a six-character set.
These sets are sent by the random code generator when "C" is "on".:
1 2 3 4 5 6 7 8 9
A G M S Y 4 . _ ;
B H N T Z 5 ? + (
C I O U 0 6 " , )
D J P V 1 7 $ - /
E K Q W 2 8 ' = Start
F L R X 3 9 ¶ : Invitation to transmit
See Morse Code Table on page 16 for a more complete listing of the code.
Q This command queries the unit for code settings. When "Q" is entered the
unit will display several of its settings on the LCD. The display is in the
following format:
S = x x W = x x T = x x x x
N = x x x x F L C A P G N
Sxx = speed in WPM FLCAPGN = where 1 is on and 0 is off
Wxx = weight in % on time F = Farnsworth mode on/off
Txxxx = sidetone frequency in Hz L = 5 character length on/off
Nxxxx = serial number C = fixed character sets on/off
A = alphabetic characters on/off
P = punctuation on/off
G = prosign on/off
N = numeric characters
Technical Assistance
MFJ-498 Instruction Manual
AA
MFJ-498 Instruction Manual
Function Key Quick Reference
Key Usage
F1 Message memory #1
F2 Message memory #2
F3 Message memory #3
F4 Message memory #4
F5 Message memory #5
F6 Message memory #6
F7 Message memory #7
F8 Message memory #8
F9 Enables command mode. See Command Mode Quick Reference.
F10 Sets speed mode. Changes the WPM of the code. Esc exits.
F11 Engages the output tune. Esc exits.
F12 Decrements the serial number. The keyer will echo a "D" for every
decrement.
Alt Used for making prosigns by removing the intercharacter spacing of
keys pressed while the Alt key is also pressed. For example, to
produce the prosign
then release Alt. Also used in conjunction with keys F1 - F8 to store
message memories.
Alt-Print Screen Plays the EPROM code version number of your unit.
Backspace Deletes the last character entered into message memory or the last
character entered into the type-ahead buffer if that character has not
already been transmitted.
Esc Exits any mode.
Pause Enters pause mode. The keyer will stop the current message being
(.-.-) hold the Alt key down, press A twice,
MFJ-498 Instruction Manual
Spacebar Inserts a word break space into the message in normal operation.
While the MFJ-498 is in handkey mode the spacebar is a straight key.
Command Mode Quick Reference
Command Description
MFJ-498 Instruction Manual
0 (zero)
1
2
3
4
5
6
7
8
9
A
B
C
E
F
Starts the QSO simulator
Sets fixed character set 1
(see "#" in the Entering Commands section)
Sets fixed character set 2
Sets fixed character set 3
Sets fixed character set 4
Sets fixed character set 5
Sets fixed character set 6
Sets fixed character set 7
Sets fixed character set 8
Sets fixed character set 9
Random alphabetic characters on/off
Iambic mode A or B toggle
Fixed 6 character sets on/off (on fixed sets,
off alphabet, numbers, punctuation, and/or prosigns)
Starts the FCC Exam Simulator
Farnsworth random code spacing On/Off
G
H
I
L
N
O
P
Q Query (see "Q" in the Entering Commands section)
R
Random prosign characters on/off
Handkey mode
Iambic mode on/off
Random 1-8 character group length on/off
(off fixed 5 character group length)
Random numeric characters on/off
Output key on/off
Random punctuation characters on/off
Starts the random code generator
MFJ-498 Instruction Manual
MFJ-498 Instruction Manual
Morse character
AAA
MIM
KR
OS
WG
AF
DN
IMI
DU
BT
AR
SN
AL
SX
KA
AS
SK
KN
Keyboard Character to Morse Code Table
Keyboard key
Keyboard
Morse character
key
A A
B B
C C
D D
E E
F F
G G
H H
I I
J J
K K
L L
M M
N N
O O
P P
Q Q
R R
S S
T T
U U
V V
W W
X X
Y Y
Z Z
1 1
.-
-...
-.-.
-..
.
..-.
--. . . .-.-.-
....
..
.---
-.-
.-..
--
-.
--- - - -....-
.--.
--.-
.-.
...
-
..-
...-
.--
-..-
-.--
--..
.----
5 5
6 6
7 7
8 8
9 9
0 0
, ,
; ;
: :
' '
" "
/ /
? ?
_ _
= =
+ +
! !
@ Error
# Paragraph
$ $
% %
^ K
& &
* *
( (
.....
-....
--...
---..
----.
-----
--..--
-.-.-.
---...
.----.
.-..-.
-..-.
..--..
..--.-
-....-.-.
...-.
........
.-.-..
...-..-
-.-.-
-..-...
...-.-
-.--.
IQ
K
(1)
(2)
(3)
(4)
(5)
(6)
10. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
MFJ-498 Instruction Manual
Full 12 Month 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 of machine reproduction or 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, of 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 provided the product is returned postage prepaid to MFJ
Enterprises, Inc. with a personal check, cashiers check, or money order for $7.00 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 a $5.00 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 (601) 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.
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