Pagina 1
KB2LJJ Radio Mods Database and Manuals
03/05/2008 08.24.31
http://www.kb2ljj.com/data/yaesu/ft-817.htm
FT-817 Mods
Battery mod for ft-817
Yaesu folks want you to buy the 9.6 vdc battery pack and do not recommend you attempt to charge batts.
from the included "stock" alkaline pack.
They have even rigged the pack so it will not charge. Poking around with a VOM I discovered that there
is a way to make the alkaline pack charge. Pull out the pack and peel the tape off of the end with the
wires.
You will find 2 red wires, 2 black wires and a green wire. cut and insulate the green wire. Put NiCad's or
NiMh Batteries in the the pack and set up the charge time circuit. I have done this with no problem. This
keeps you from breaking the bank buying alkaline cells and give you portable batt. power.
Two words of caution:
As with all mods, the warranty is affected, do so at your own risk.
By during this mod you have now disabled the protection feature and can re-charge alkaline batts.
This could be dangerous and messy...be careful not to do that. Of course with this mod, you will have
little reason to use alkaline cells.
Enjoy. I look forward to hearing about other ft-817 mods for this nifty little rig.
Subject:
Install fuse.
When you do the "green wire mod" on the FT-817 to permit charging of internal NiMH or NiCad
batteries, it's very important to install fuse protection or you could ruin your motherboard (a VERY
expensive mistake).
Perhaps the easiest way is to install a 2-3 amp Pico fuse in line with the positive (red) wires leading to
the battery pack. Better still, put another Pico fuse in line with the negative (green) wires also.
Bill
WA6CCA
Subject:
Green wire mod
