MGL Avionics User Forum

Re CANbus wiring- best practice is screened twisted pair.
That will make a very robust and interference resistant network.
You can often get by with less than that, but at a minimum go twisted pair.

They normally don't leak, but best to use silicon rubber tube (the stuff model aircraft guys use as fuel tube) with a small cable tie sealing it off behind the barb on the nipple.
The seal can be easily broken if you use stiffer tube with any bending force on the nipple.

The XCOM manual is pretty cryptic, but this looks like the setup you will jeed. Manual is here > https://www.aircraftspruce.com/catalog/pdf/11-02206manual.pdf Page 14- select SERIAL Page 16- select GAR for Garmin SL30/40 protocol Then set the EFIS serial port to SL30/40 protocol Wire EFIS TX to XCOM...

If the senders are resistive type you will need the pull-ups on. If voltage type, pull-ups off. Assuming it has not been done before, you will need to calibrate the fuel levels as per the manual- Specify tank size Drain tank to minimum usable Teach tank level in 20% increments (empty/20/40/60/80/ful...

Connect the lamp to an external supply and the RPM-2 will provide the ground when in alarm.

If a 912, I would first be suspicious of the rectifier/regulator- they can be very noisy. Simplest test is to disconnect the charging line from rect/reg to battery positive and see if the interference goes away. Fix is to fit a BIG 47,000uF 50V electrolytic capacitor across the rect/reg output and g...

I have 2 customers reporting the same issue. Their Vega Control heads worked fine for a long period, then started to exhibit this problem. Given the significant period when things worked fine, I suspect it is related to wear and changes in the frequency knob microswitch. I am doing a swap-out for on...

The NIEU07D is what I use on 914s. The differential pressure (fuel to airbox) is typically around 3.5psi, so I suspect your sensor is doing exactly what it should. I suspect the problem boils down to 3 possibilities- bad RDAC channel, wrong Xtreme fuel.p setup, misunderstanding/expectation of what i...

I would first check the RDAC channel is working. Disconnect the sensor and switch the pull-up resistor for that channel ON. Check with a voltmeter for approx 5V on the input (pulled up by the resistor). Check the ADC reading is around 4000. Repeat with the input grounded- input voltmeter reads 0V? A...

Re OIL.P- the RDAC needs the 100ohm resistor input to ground to convert the current output from the sensor to a voltage for the RDAC to read.
Re FUEL.P- set the sensor type as 0-5V T1EU07.