I have the ICOM-Dualband-Handy IC24AT (Asia Version) and want to modify it
to enable the 1750 Hz-tone for repeater-operation.
I searched all the PR-Mailboxes in HB9 for mods but i found nothing about
enabling the burst-tone.
The Printed-Circuit-Board look like this:
+---------+
I I
I I
I micro I
I Contr. I
I I
I I
+---------+
* * * *
D5d d6d
* *
* * *
dd7 d8D
* * *
* * * *
d11 dd12
* *
o o
d13 d14
o o
In my Handy, only D5 and D6 are mounted. I measured the pins with a multimeter
and found following:
-D5 is a pair of diodes were the under, center pin is
the cathode of both and the upper two pins are the anodes
-D6 is only one diode where the upper left pin is the anode
and the lower, center pin is the cathode. The upper right
pin of D6 is not used.
So, all I need is the info which diodes are to remove or attach and is there
still more to do (like adding some resistors)?
|
