Subject: FT-530 mods. Here they are.

From: [email-masked] (Gene Wolford)
Date: 10 Jun 1993 18:14:56 -0700

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

[email-masked]

-- 
	    Those who beat their swords into plowshares
             are destined to plow for those who don't. 
			[email-masked] 
Please direct flames to: [email-masked]