Revell Type IX - 1/72 scale

[trout]

Working on wrapping up the Sub-Driver for the Type 9, then begin trimming.
I am having an issue with my Low Pressure Ballast Pump, it stays on the moment I plug it into the receiver. I have tried a variety of channels and to no avail. The receiver is a Sombra Labs SL-8 and the TX is WFly 8 using a modular crystal less unit. The other servos work when I plug them.
What am I missing or is there something else I can try?
Peace,
Tom

[He Who Shall Not Be Named]

You're using the ch-4 output port on the receiver for the ballast sub-system, right? and you have a Y-lead feeding both the MPC and ballast servo, right? Check the end-point setting of channel-4 (rudder) of the transmitter. Initially set it for zero-zero. Then, after checking operation, get back to us.



M

[trout]

Y-lead feeding both the MPC and ballast servo, - Check
End-point setting of channel-4 (rudder) of the transmitter - Check
Set it for zero-zero - Check

Power on radio, then powered on SD and the pump starts up immediately
Checked to make sure the blow/vent servo is truly not moving because of 0/0 setting. It was not moving.
Tested it without battery link monitor - no change
Changed end points 100% right and 0 left, The pump still ran.
Turned 100% left and 0 right. No pump at all. Cool, I thought.
Tried 100/100, pump will not start at all. The light is green on the pump controller.
So, now the pump is not running at all. Do I need that special Y harness (buffered y-lead)?

[greenman407]

Did you get it figured out Tom?

[trout]

Thank you for the follow up! No I have not got it figured out yet. I just got the buffered or boosted y-harness in. This weekend I should be able to work on it.