[ICOM] ICOM Pro series: backlight issue

[GGLL]

	Many circuits of dimmer controls for radio display lamps use a linear series 
pass transistor scheme to vary the voltage applied. So you have two "different 
strains", one because the heat produced by the series pass transistor (affects 
itself and the circuit board, if not also to very close components located 
around it) when you use the lower light settings. But, on the other hand, this 
strains less the lamps.

Best regards
Guillermo - LU8EYW.

John Hensley escribió:
> What backlight setting puts the least strain on the backlight circuit.  
> Some internet threads awhile back were suggesting the high setting put 
> the least strain.  Is this still true ??
>