[Amps] HARRIS RF103 amp

[Robert W5AJ]

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/