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Hi Jim,I have spent almost all my life as two way radio tech and have repaired many of those old tube type radios like the 830 and almost always,I will say 95% of the time is the bandswitch has corrosion in the tiny contacts,you first choice will be to buy one of those good contact cleaner spray cans and while you be spraying all those contacts,move gently the bandswitch back and forward to get rid of corrosion and dirty,if that don't work or fail again after a while,then do what those guys said,send it to a good tecnician to do a detailed cleaning of the bandswitch.Good luck.
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. Sensitivitas CMOS lebih rendah karena setiap pixel terdapat beberapa transistor yang saling berdekatan. Banyak foton mengenai transistor dibandingkan dioda-foto. Sensor CMOS menggunakan sumber daya listrik yang lebih kecil. Sensor CCD menggunakan listrik yang lebih besar, kurang lebih 100 kali lebih besar dibandingkan sensor CMOS.
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