[ICOM] 746PRO Backlight

[Markku Tanninen]

Insulator is ceramic what i have removed from old commercial power supply. I 
think that all insulator what endure heat can use. Remember insulate 
transistor from metal box by using properly materials.
I think that there is no reason keep display bright if change this 
transistor better which last current better than original SMD one.

My IC-746Pro display brightness is pretty low because it is especially at 
nigth too bright.
Display bulb is cold cathode so i dont think that bulb not goes bad even 
though it keep low brightness.

73 Mark OH3FP



Thanks Mark for the info & your mod on the fix.  Is the insulator you are 
using plastic?  I have seen the thin piece of insulator that comes with 
transistor, but not one of this kind.

Also is it wise to keep the brightness pretty high to produce less current 
on the transistor?  I have seen others on the groups.yahoo.com say this, but 
was wondering if this was wise to do.  I figured it would shorten the life 
of the display bulb, but not for sure if that is true.