[Amps] HARRIS RF103 amp
Robert W5AJ
woodr90 at gmail.com
Thu May 13 15:17:54 EDT 2021
UPDATE RF103 Amplifier
There is error or inconsistency between the Schematic and the PCB layout drawing
R17 <-> R37
and
R18 <-> R38
are reversed on one of those drawings.
I am adjusting Lower limit with resistor connected to Pin 4 of diff Amp so think labels moved with resistors.
Links below
working the Servo board on RF103
Turns coil “Down” but not “Up”
adjusted down on variable resistor at Pin4 of Diff Amp
At this Point, the Servo board will be removed to get to back side to start unsoldering and testing individual components
If someone has manual showing UPDATE, gee what are these 50 years old now??
https://www.dropbox.com/s/44kee6hk0o6lmme/RF103%20IC1%20PCB%20layout%20Markup.pdf?dl=0
https://www.dropbox.com/s/pe5ci87dpuv1859/RF103%20IC1%20pin1%20Markup3.pdf?dl=0
73
Robert W5AJ
Midland, Texas
<http://pages.suddenlink.net/w5aj/> http://pages.suddenlink.net/w5aj/
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