- he rescued a RTSIII for me a few months ago which was in a terrible state. I know he's very busy until mid-January but he might have heard of this problem (it's new to me) and may be able to help. I'm sorry I can't be of more use to you.
it appears that the sound is becoming higher when the light is brighter outside. i explain. when the external light change, the intensity of the blue marks of the information in the view finder is changing also. i guess that the intensity of the sound depends on the intensity of the blue light display in the view finder.
you make me worry.