----- Original Message ----- From: "Dave Webb KB1PVH" <[email protected]> To: "AMSAT -BB" <[email protected]> Sent: Monday, February 07, 2011 5:16 PM Subject: [amsat-bb] G5400 elevation issue
The display on the control box reads correct elevation, but on my digital display on the Easy Rotor Controller shows erratic elevation position. I have recalibrated it several times with no success. It won't read any elevation until it is around 20° give or take. It also seems to have become worse since our really cold temps set in. My best guess is the pot in the rotor, but not sure where to start in the process. Thanks in advance Dave - KB1PVH Hi Dave, KB1PVH If the display on the control box reads correct elevation then the 500 ohm pot into the rotor is OK By the way if the digital display on the Easy Rotor Controller shows erratic elevation probably the rear potentiometer VR4 in the rear of the control box of the G5400 is set erratic. Measure the DC voltage between pins 1 and 8 on the external control DIN connector. If the pot VR4 is set correctly the voltage must be 0 volt with elevation = 0° and 2.5 volt with elevation = 90° and 5 volt with elevation 180° i.e. with the antenna completely flipped to 180° The potentiometer VR4 is located in the rear of the control box as shown in the instruction manual. Have fun 73" de i8CVS Domenico _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
