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Internal heating in the FT-840

AudioShockwav

AudioShockwav

Extraterrestrial
Staff member
Apr 6, 2005
10,373
11,843
843
Sierra Nevada by Yosemite National Park
Increase the wattage of resistor R2213 from 2W to 5W, this component is on the card next to the Local Unit J2026.

If you have not replaced, note that the printed circuit board and resistor gets dark from excessive heat .

This change helps to lower the temperature in the area of the voltage regulators, and the reduce the probability of failure.

Mod Provided by PU4ASL.

73
Jeff
 

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    Hello gentlemen and Ladies. I have the dreaded RCI-2990 receive issue where my radio gets distorted when people get close to my location. I found the C90 Capacitor, but I can not for the life of me find the C89 capacitor. Can or does anyone have a picture of the exact location of C89 ? Thank you in advance, Wes
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