YAESU FT-530

Expanded Receive 110-180, 300-500 MHz
Expanded Transmit 130-180, 400-470 MHz

NOT LEGAL IN U.S.A - FOR EXPORT ONLY

o Remove Antenna and Battery.
o Remove four screws on bottom holding battery track.
o Remove the four (black) screws holding rear case.
o Slowly... open the front cover from tranceiver and lay both halves on table.
o Note positioning of white paper insulator in right half of radio and lift out
  (don't throw away)
o Carefully locate Jumper Pad 13 and remove solder.
o Re-install white paper insulator, make sure ground tab slides through the 
  paper insulator.
o Close radio back up (Careful not to pinch the ribbon cable near lithium 
  battery when closing halves).
o Re-install the four (black) screws holding rear case.
o Re-install the four (small silver) screws on bottom holding battery track to
  radio body.
o Attach Antenna and Battery.
o Turn off Radio.... Press and hold both arrow keys while turning on the Radio.
o Modification Complete.

------------------------
|                      |
|                      |
|                      |
|                      |
|           ---        |
|           | |        |
|           ---       /
|           ---      /
|           | |     /                         2 (|)  (|) 1
|           ---    /                          4 (|)  (|) 3
|                 /  <---  Jumpers are here   6 (|)  (|) 5
|              o /                            8 (|)  (|) 7
-----------------             Blowup --->    10 (|)  (|) 9
                                             12 (|)  (|) 11
                                             14 (|)  (|) 13
                                             16 (|)  (|) 15
-

In side the rig, it really did not look quite like that ...    more like this:

...  12 (|)  (|) 11 
           (|) 13
      16 (|)  (|) 15

In addition to the published receive expansion, it also receives 800-950 MHz...
trunking radio, cell phone (I would *never* listen to that), 33cm ham band...

Have fun!


/---------------------------------------------------------------------\
| Jeff Otterson                  |  The opinions expressed here are   |
| j_otterson@star.enet.dec.com   |  mine.  Noone else should be held  |
| Digital Equipment Corporation  |  responsible for my actions.       |
| 110 Spit Brook Rd. Nashua,  NH |  CENSORSHIP IS THE TOOL OF TYRANTS |
\---------------------------------------------------------------------/





This is a compilation of modification information I received in response to 
my posted query and the info faxed to me by Yaesu.

There are at least 2 board layouts out there.
Note that while the jumper pad numbers have not changed, the board positions
of the pads have.



YAESU FT-530

Expanded Receive 110-180, 300-500 MHz
Expanded Transmit 130-180, 400-470 MHz

NOT LEGAL IN U.S.A - FOR EXPORT ONLY (The expanded transmit part)

o Keep that magnifying glass handy! 8-)
o Be aware that your repeater memories, ect. will be erased. :-(
o Remove Antenna and Battery.
o Remove four screws on bottom holding battery track.
o Remove the four (black) screws holding rear case.
o Slowly... open the front cover from tranceiver and lay both halves on 
  table.
o Note positioning of white paper insulator in right half of radio and 
  lift out
  (don't throw away)

o Carefully locate Jumper Pad 13 and remove solder.

-----------------------------------------------------------------
o NOTE: If you wish to restrict transmit to the ham band, 
  Carefully locate Jumper Pad 15 and remove solder.
  Otherwise, leave pad 15 in place.
-----------------------------------------------------------------

o Re-install white paper insulator, make sure ground tab slides through the 
  paper insulator.
o Close radio back up (Careful not to pinch the ribbon cable near lithium 
  battery when closing halves).
o Re-install the four (black) screws holding rear case.
o Re-install the four (small silver) screws on bottom holding battery track 
  to radio body.
o Attach Antenna and Battery.
o Turn off Radio.... Press and hold both arrow keys while turning on the 
  Radio.
o Modification Complete.

------------------------
|                      |
|                      |
|                      |
|                      |
|           ---        |
|           | |        |
|           ---       /                     rev. 12-21-92
|           ---      /                 
|           | |     /                         2 (|)  (|) 1
|           ---    /                           4 (|)   (|) 3
|                 /  <---  Jumpers are here     6 (|)   (|) 5
|              o /                               8 (|)   (|) 7
-----------------             Blowup --->       10 (|)   (|) 9
                                               12 (|)   (|) 11
                                              14 (|)   (|) 13
                                             16 (|)  (|) 15


					     
------------------------
|                      |
|                      |
|                      |
|                      |
|           ---        |
|           | |        |
|           ---       /                     rev. 5-14-93
|           ---      /                 
|           | |     /                           (|)  (|)
|           ---    /                            (|)  (|)
|                 /  <---  Jumpers are here     (|)  (|)
|              o /                              (|)  (|)
-----------------             Blowup --->      (|)  (|)    __
                                          12 (|)   (|) 11 |  | 6 pin mini IC
                                                   (|) 13 |__|                                            
                                           16 (|)   [] 15
						    []   
					
				Pad 15 now a vertical pad with a tiny
				"zero ohm" resistor.


My rig got confused after this mod and it was neccessary to reset the 
CPU. (The 70cm repeater offset register got fouled up and though it could 
be incremented and decremented by the normal 50khz, 
it went 0.01mhz, 0.06, 0.11, ect. instead of 0.00mhz, 0.05, 0.10, ect.).

Reset command: turn radio on while holding "MR" and "FM"
(Damn, memories erased again!)

If anyone figures out how to receive higher freqs, say up to 800-950mhz,
(so I can listen to the 900mhz ham band of course),  8-)
please let me know!

Thanks

Genew@techbook.com





You are correct, I should have said REMOVE jumper 13 to get rx 110-180,
300-500, and 800-950.  Also tx 130-180 and 400-472.

However the mod sheet DOES say jump pad 12 for tone burst.

I will gladly send a copy of it to anyone who sends me a sase.
CBA for KD1GG
Bob




As you all know the mod for the Yeasu FT-530 is to remove the jumper #13. The
next step is very important and a few mod plans don't mention. The CPU needs
to be reset by holding the UP and DOWN keys while turning the radio on. Before
you do the reset, remember to remove all power sources to this radio and wait
for the rig to completely discharged prior to the reset. If the rig is not
totally discharged, the mod will not work. Good luck
73 de John KC6VLG @ WA6HAM.#NOCAL.CA.USA
================================================================================




I know of 2 physical changes:

1).  If jumper 15, (or the zero ohm resistor, depending on your version), is 
removed, the transmit freq's remain stock when done with removal of jumper 
13.   This is per the mod sheet from YAHOO.

2). Putting a solder bridge across jumper 12 makes it a tone burst unit for 
Europe.

Jim G


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


Here is the summary of a mod that I've put together from talking to people
on the phone, radio, and email for the Yaesu FT-530.  It is a very simple
mod and it allows extended rx & tx.
This mod only applies to the newer models of the 530.  I don't know what
serial number implies the newer model, but my 530's serial number begins
with 4J381xxx and was purchased in June 1995.

1. take off the battery pack from the bottom of the radio.
2. unscrew the four screws on the bottom to release the bottom plate.
3. after you open the plate, you'll see a green wire on the right side
   of the radio (if you hold it with the front panel on top).
4. simply cut this green wire and use some electrical tape to prevent it
   from touching other parts of the radio.
5. replace the bottom plate and screw it back in.
6. attach the battery
7. hold both the up & down Mhz arrow buttons and press the power button at
   the same time.  this will enable to the mod.  It is like a toggle, if you
   do it again, it will disable to the mod.  
8. Now you should have rx 110-180, 300-500, 800-950, and tx 130-180, 400-480.
Note: this mod will reset your radio and all memories will be erased.

Here is a second mod you can do to get more rx.
1. On the 70cm band, program your radio's lower (L) and upper (U) memory
   limits to 300 and 950.  
2. Turn to the Lower memory channel.  
3. Press MR once and you should see a four tiny little arrows right below
   the channel number.  
4. Once you see these little arrows, you can enter any frequency
   from 300-950 Mhz directly on the keypad. 
You can also store these new rx frequencies in memory if you like.  
Note: Although you can enter 800-950 Mhz into the radio, I have not heard
anything in this range.  It is rumored that the components to receive on
this band is no longer made in the FT530.

Disclaimer: Perform these mods at your own risk.  They are not guaranteed
to work on your radio.  And remember not to transmit out of band!!!

any questions or comments?  Send to hbcsc274@csun.edu
Jerry Wang
KE6UUX

