FT411 MODIFICATION VIA COMPUTER
-------------------------------
I was unhappy with the FT-411's "3" mode because the frequency had
to be entered starting with the 100 MHz digit, and the ARS function
would not work.  I now use it in the "2" (normal) mode with the
following mod.
I used the "clone" mode to dump the FT-411's ram to a computer.  It's
9600 baud, 1 start bit, 1 stop bit, CMOS logic.  544 bytes are dumped
when the up arrow is pressed.   Starting with byte $211 are the upper
and lower transmit and receive frequencies, stored in BCD.  I changed
these to the limits I wanted.  My FT-411's upper PLL limit is 195.4
MHz, so I used 195 MHz.  The lower limit MUST remain set to 130 MHz
(magic number) or the keyboard entry of frequencies will start with the
1 MHz digit .VS. the 10 MHz digit.  To put the data back into ram, just
press the down arrow and send the new 544 bytes to the FT-411.  You
could also just clone an H.T. that has the limits you want.  You can
not clone a mode "3" H.T. to a mode "2" H.T., however.  The mode is
contained in the first byte, which must match.

Bill Pherigo WR0Y


FT 411 TO PACKET
----------------
FOR THOSE THAT WISH TO CONNECT A FT 411 TO PACKET VIA A MFJ TNC THE
FOLLOWING MODIFICATIONS ARE NEEDED. IN THE BLACK LEAD  FROM THE TX AUDIO
OUT INSERT A .01-0.1UF CAP. IN THE RED LEAD FROM THE PTT, INSERT A 2.2K RST.
THEN COMBINE THESE INTO A COMMON SINGLE LEAD CONNECTED TO THE TIP OF THE
SMALL MIKE PLUG. THE YELLOW RX AUDIO GOES TO THE TIP OF THE LARGE SPEAKER
PLUG. AND THE SHIELD GOES TO THE RING OF THE LARGE PLUG. THIS INFORMATION
CAN BE FOUND IN THE 1989 AUGUST ISSUE OF 73. PAGE 58
IT WORKES FOR ME .73'S N8KLT@NO8M.OH.USA.NA


FT-411 OUT OF BAND MODIFICATION
-------------------------------
Yaesu has sent out the following as an extended frequency coverage mod for the
FT-411.  I tried it and it works as advertised. First remove all black screws
from case. Remove 4 silver screws holding the battery connector on bottom.
Remove the 3 knobs. Carefully separate the front and back. There is a
multiconductor trace between the front and back so hinge the front from the
back to keep from putting too much tension on the traces. Looking at the board
side of the front cover there are 8 little solder pads. They are half hidden
by a cover plate and the multiconductor trace. Pad 2 will have a solder
connection, the rest are open. Remove the solder fro the battery connector on
bottom.
Remove the 3 knobs. Carefully separate the front and back. There is a
multiconductor trace between the front and back so hinge the front from the
back to keep from putting too much tension on the traces. Looking at the board
side of the front cover there are 8 little solder pads. They are half hidden
by a cover plate and the multiconductor trace. Pad 2 will have a solder
connection, the rest are open. Remove the solder from pad 2 and place a solder
bridge on pad 3. All other pads will be open. Close up radio.
Now when you turn on radio it will come up with 1.000 in the display. Memory
channel should say 1. Program in the lower receive frequency.
Example 1 - 4 - 1 - 0  then push VFO key. The Memory channel should go to 2.
Now program in the upper receive frequency. i.e. 1 - 6 - 5 - 0 and push VFO
key. Memory will move to 3. Do same for lower and upper transmit frequencies.
Note. The receiver sensitivity falls off at 162.55 to about 1 uv. The step and
repeater offset will need to be re-programmed also. Follow instruction manual.FT

---------------------

I discovered a nice trick to increase its frequency coverage.
It is so simple that you don't even have to open your hand held.
All you have to do is:
1. Make sure that the power switch is off.
2. press the UP arrow and DOWN arrow together, at the same time
   (those keys are also called A, and B.
   and they placed at the upper right side of the keyped)
3. Keep pressing both buttons and turn the power on.

Now you can receive 130-174Mhz, and transmit 140-150Mhz
CAUTON: When you do this modification the memories can be erased.
Ayhow I think it is not the end, and there are some more options.
If you do have some more information about this Hand held,
Please leave me a msg with it.

                              Tnx, AVIAD, 4X6TL@4Z4SV

-----------------

RECENTLY I SAW A MOD COME ACROSS THE SYSTEM ABOUT THE YAESU 411E PTT LOCK.
THE SAME MOD IS AVAILABLE ON THE 411. JUST TURN OFF THE RADIO. HOLD THE PTT
BUTTON AND THE #6 BUTTON WHILE TURNING ON THE RADIO. PRESS FM THEN 6.
PRESS FM THEN 6 AGAIN THE LOCK AND THE PTT ICON WILL NOW BE ON. THATS ALL THERE

Craig Witkowski, KA2IBV


FT 411 OUT OF BAND MODIFICATIONS. 
---------------------------------
1) Open the front cover.
2) Locate the C.P.U. unit (it is located on the front cover).
3) Locate Jumpers 1, 2, 3 and 4 , These are the band setting jumpers.
4) Jumpers No. 1, 2 and 4 should be disconnected,and jumper No. 3 should be
   connected.
5) Close the radio.
6) Apply power to the radio and turn it on.  The display will initialize with
   memory No. 1 flashing and the frequency display will show 1.000.
7) Now, adjust the display to the desired lowest receive frequency. When done,
   press VFO. The memory CH will now show 2 flashing.
8) Adjust the display to the desired highest receive frequency. When done,
   press VFO. The memory CH will now show 3 flashing.
9) Adjust the display to the desired lowest transmit frequency. When done,  
   press VFO. The memory CH will now show 4 flashing.
10) Adjust the display to the desired highest transmit frequency. When done,
   press VFO.The rig is now set for your programmed band on transmit and
    receive.
                         COMMENTS
                         --------
1) If after programming the rig as above, you wish to change it to other 
   ranges you will have to open the rig again and disconnect jumper No. 3.
   Then apply power to the radio and turn it on and off. Open it again, connect
   jumper No. 3 and continue from step 5.

73 Aviad 4X6TL @ 4Z4SV


FT411A/E Reprogramming CPU's Rx/Tx Frequency Limits FT-411 FT-811 FT-911
====================================================

The CPU of the FT411 stores four frequecies that specify the
lower and higher limit of RX and TX range. Even if you reset 
the CPU, those frequenties are preserved. 
But if the CPU is restarted, then it resets the four
frequenties at 1 MHz, and asks you to reenter it, in order
to complete the restart.

CPU restart
-----------
a) Remove the battery pack. Remove the metal cover in the low
   side of the case (four screws).
b) Restart the CPU by disconnecting and connecting again the
   lithium battery. (Or, if you like, by shorting the lithium
   battery momentarily.)
c) Repack the equipment.

Frequencies setting
-------------------
a) Turn on the porto.
b) Now, the display presents the number 1 in the memory place 
   and 1.000 in the frequency place.
   Enter the rx lower limit (132 Mhz) and press the [VFO] key.
c) The display presents the number 2 in the memory place
   and 1.000 in the frequency place.
   Enter the rx upper limit (174 Mhz) and press the [VFO] key.
d) The display presents the number 3 in the memory place
   and 1.000 in the frequency place.
   Enter the tx lower limit (136 Mhz) and press the [VFO] key.
e) The display presents the number 4 in the memory place
   and 1.000 in the frequency place.
   Enter the tx upper limit (170 Mhz) and press the [VFO] key.
f) Now the CPU restart is completed and the display returns
   to the normal reset state.

If you turn off the porto before pressing the [VFO] key the last
time, when you turn on again the process restarts from b).


FT 411 EXPANDED FREQ. RANGE
---------------------------
To  reset the  microprocessor and  program lower  and  higher  frequency  range
proceed as follows:
1. With the  hand-held switched off,  press and hold  the MR, VFO  and number 2
   button.
2. Switch on the hand-held, the display will now show 1000
3. Program the lower RX limit by entering the frequency, for example 138.000
4. Press the VFO button.
5  Program the upper RX limit by entering the frequency, for example 180.000
6. Press the VFO button.
7. Program the lower TX limit by entering the frequency, for example 130.000
8. Press the VFO button.
9. Program the upper TX limit by entering the frequency, for example 180.000
10. Press the VFO Button.

The FT-411E is now ready for use.
You can, if you so wish set different lower and upper limits for TX and RX, for
example expanded range on RX and Amateur  band range on TX. There is a limit on
both lower and upper frequency range, where it will not transmit.

Best 73, Jimmy, ZB2BL @ ZB2BL #GIB.GIB.EU


FT-411/411E/811 OUT OF BAND MODIFICATIONS
------------------------------------------
 First remove all black screws from the rear case and top panel. Remove 4
 silver screws holding the battery connector on the bottom. Remove the 3 knobs.
 Carefully separate the front and rear cover. There is a multiconductor trace
 between the front and back. Keep care with it !!! Looking at the "CONTROL
 UNIT" board, you will see 8 solder jumpers half hidden by a cover plate and
 the multiconductor flat cable. Remove the solder from pad 1, 2 and 4. Place a
 solder on jumper 3. Don't change other jumpers. Close the radio. Now when you
 turn on the radio it will come up with 1.000 in the display. Memory channel
 should say "1". Program in the lower receive frequency. Exemple 135.000 MHZ
 then push VFO key. The Memory channel should go to "2". Now program in the
 upper receive frequency. i.e. 185.000 MHZ and push VFO key. Memory will move
 to "3". Do same for lower and upper transmit frequencies.
 
 For FT811 do the same as above and program i.e. 420 to 460 MHZ.
 
 If you need to reset or reprogram do like following:
 Turn power OFF, press MR, 2 and VFO at the same time. While holding these
 buttons, turn power ON and restart programming.
 
 73's de Phil, F1LOU @ ON7RC.BT.BEL.EU


FT411 modification.
-------------------
hello dear oms!
after a little accident, i got into a special mods to programm
rx and tx frequencies.....
just switch off, press the keys f/m and 0 and then switch on.
you'll be in a special mode (american?), for the display only
shows freqs between 220.000 and 225.000 Mhz and a  repeater shift (not fixed)
of 1.6000 Mhz.
just one more time switch off and on, you'll be in the programmers modus.
The display shows 1.000 Mhz and the memory digital <1>, this is the lower
RX-freq. you can enter any digits you want up to 655.000 Mhz, then press
key <VFO> and it is fixed. the next you enter ist the upper rx-freq,
press again <vfo>, after.
the next, memory shows <3>, is the lower tx freq, enter and press <vfo>.
the last is the upper rx-freq, then you'll be in normal operating modus.
I'll hope my pidgin made it.....
so you won't really be able to send at all theese frequencies, just look
at the red LED. i'm not able at all to know, what's the real freq-range,
but i found some intersting things never relaiting to the display....
I'd be glad to hear about your investigations and results,
73! de dg3mgh @ db0pv ,stefan from munic, dl


To allow the FT-411 to recieve from 130 MHz to 174MHz and to transmit
from 140 MHz to 151 MHz, turn off the radio and hold down both of the arrow 
keys  and turn on the radio. Be sure to write down all of the contents of
your memories first as this will erase them ! This is the MARS modification. 
Repeating this procedure will turn the FT-411 back into a HAM only transciever.
Refer to the mods server for a more involved mod that will allow you to 
set the transmit and recieve frequency limits at will within the capability
of the rf deck. 

WARNING: Do not transmit over the air outside of the ham bands unless you have 
the appropriate MARS license! For other frequencies, don't transmit at all
because the FT-411 is not a FCC-Type-Accepted radio for the public service
bands! Also make sure that your radio can't accidently transmit  on a public
service repeater ( in case you are all thumbs, or your radio gets stolen!)

  Stan Witherspoon 
  RF: N6SCE        

Note: I haven't tried this, proceed at your own risk.  WA2ISE




      modifs FT411E :
      ---------------
    Localiser les "jumps" 1 a 4 sur le "control unit". 1,2 et 4 doivent etre
ouverts et 3 ferme.
    A l'allumage du poste vous verrez a gauche sur l'affichage un "1",
entrez alors la frequence RX la plus basse (ex. 138.000) et appuyez sur le
bouton "VFO".
    Maintenant un "2" est affiche.
Entrez la frequence RX la plus haute (ex. 180.000) et appuyez sur "VFO".
    Un "3" est affiche. Entrez la frequence TX la plus basse (138.000).
Poussez sur "VFO".
    Un "4" est affiche. Entrez la frequence TX la plus haute (180.000).
Poussez sur "VFO".

              Phil, F1LOU @ ON7RC


Modification du FT411 - YAESU -----

1): Dessouder les straps 1 et 2 (la rangee de straps de 1 a 8 se trouve en 
bordure inferieure du blindage qui recouvre le CPU)
2) Souder le strap 3
3) Reste les Straps 3 et 5
4) Faire un reset de l'appareil comme indique dans le manuel  en allumant et
 eteignant deux fois de suite par le bouton de volume  le ft411 tout en tenant
 appuyes simultanement les boutons MR et VFO du clavier. L'appareil doit 
afficher 1.000 et un petit 1 qui clignote.
5) Faire avancer l'affichage par la molette du VFO jusqu'a obtenir la frequence 
basse desiree (ex : 135.000)
6) Appuyer sur le bouton VFO (1 fois). Un petit  2 doit clignoter.
7) Faire avancer la molette du vfo pour afficher la frequence la
 plus haute ( ex : 170.000 )
8) Appuyer sur VFO, un petit 3 doit clignoter. Ceci fixe la limite de reception 
de l'appareil.
 Reculer ensuite le VFO d'un cran pour retrouver la frequence basse
choisie precedemment, et appuyer sur VFO . Un petit 4 doit clignoter
9) Avancer le VFO d'un cran, on doit retrouver la frequence haute
 choisie precedemment, appuyer sur VFO une derniere fois.
 Ceci fixe les limites d'emission de l'appareil.  
 Si les procedures ont on etees suivies correctement l'appareil
 doit demarrer de 135.. a 170 Mhz dans le cas choisi ici...
 NOTE : L'appareil semble sur le modele utilise ici, fonctionner
 sans retouche du VCO de 125 a plus de 200 Mhz !!! Le tout
 avec une sensibilite et une puissance de sortie quasi constante...



