tail step down

[furywife04]

Would like to know how to install this with 601. DOes it run fom the tail to gyro or from the receiver to the gyro

[bighands3d]

which are you reffering to the wireing. you can only plug in the gryo sensor to one location. the leads wont let you do but two things the Aux channel for HH and Normal. it should all be on the unit as well. What goes were.

Gyro to Amplifier--Amplifier to Reciever-- Aux to Reciever-- amplifier to Rudder servo

is this what your looking for.

[DavidH]

There are two ways this step down can be installed;
a) Connect the step down directly to your tail servo lead. This method will supply 5.3 volts to your tail servo while the rest of your helicopter operates at 6 volts including the gyro.
b) Plug the step down into your receiver and then into your gyro. This method will supply 5.3 volts to your gyro and tail servo while the rest of your helicopter operates at 6 volts.

THE STEP DOWN IS ONLY USED IF USING A REGULATED 6 VOLTS.
IF USING ANY REGULATOR THAT IS SET LOWER THAN 6 VOLTS, THE STEP DOWN WILL STEP THE VOLTAGE DOWN .7 VOLTS.

I would use the B method. Plug the Step Down into the Rudder channel. Then plug the lead from the gyro into the step down. The Aux lead from the gyro does not use voltage.
David

[furywife04]

Thanks david, using method B is what duralite just told me over the phone. For you guys using the new 611 you can use method A

[DavidH]

You can use Method A or B with the 601 and 611.
It really doesn't make any difference.

David

[Clintstone]

The 601 does transfer power on the data (aux) lead as it has 3 wires unlike the 401 with only a signal wire. I am running mine plugged into the amplifier as I needed an ext. for my stratus anyway. I have been running it this way for some time. I would think that you could remove the power wires from the auxilary lead but I am not certain but I have run it with no problems to date, I will follow up with Jack tomorrow. More info later.

[DavidH]

Clint,
Yes I know it has 3 wires. But I don't believe they are hooked up inside the brain box. Here is a simple test that can be done. Take the red and black lead out of the aux plug. Then plug the aux plug into the RX with only the white wire. I believe the gyro will still function normally.

The GY 401 is the first Futaba gyro I have seen that they only used one lead on the aux channel. I guess since in was considered an entry level gyro, they tried to keep it simplier.

David

[Jerry]

David,

I experimented tonight with the 611. I installed the stepdown on a 6V regulated system between the Rx Rudder Channel and Gyro Box. The GY611 Voltage readout was 6.0V.

I then unplugged the Aux Wire from the receiver, and the voltage immediately jumped down to 5.3V on the GY611 display.

Thus, as Clint said - Voltage does travel through the Aux Wire. You would need 2 stepdowns to run the Gyro and servo on 5.3V.

Jerry

[Clintstone]

You could use a small lead and remove all but the signal wire on the auxilary channel..........just a thought.

[furywife04]

I went ahead and put the stepdown between the servo and the gyro. So i guess the servo is running on 5.3 and the gyro on 6.0 volts. Will this hurt the gyro?

[DavidH]

Jerry,
Clint had already told me with the Aux lead plugged in there was 6 volts if the step down was plugged in between channel 4 port and the brain box. I had made the post before he told me. That is one of the first gyros I know that Futaba has sent power thru the Aux lead also. Normally the wires are there but not used.

I will get in touch with Jack @ Duralite and tell him to just have the instructions state that it goes between brain box and servo only.

David

[malc1]

I`ve just picked up one off these voltage drop devices today to use with my regulated supply and have a slight problem.
I have a 5.45 volt regulated supply feeding the reciever,gyro etc and needed to step this down to 4.8V to supply my JR 8700G servo.
The thing is I have 5.45 volts coming out of the gyro and going into the Duralite device and still have 5.21 volts leaving it to supply the tail servo.
What happened to the 0.7 volt drop that is supposed to happen that would put me somewhere near the 4.8v ?
Does this sound right and is it ok to supply the 8700G with the 5.21volts?
Should any measurements be taken while servos are connected and the supply has a load on it?

[DavidH]

If you have 5.45 volts feeding the electronics. Why do you want to step the voltage down to 4.8 regulated volts to the 8700G servo. That servo will work fine on 5.4 volts.
A 4 cell ( 4.8 volt) nicad or nimh pack when fully charged is close to 6 volts for the first couple of flights. The 8700G has no problem operating at that voltage.

If the instructions state 4.8 volts only for the 8700G. What they are saying is they don't want pilots using a 5 cell ( 6 volt) nicad or nimh pack which when fully charged is 7 volts or better.
You do not need a step down if you have 5.4 volts regulated supplying the electronics.

What regulator or you using? Duralite has 5.1 volts, 5.3, 5.6, 6 volts.
The regulators have to have a load on them to supply the set voltage. Just checking them with a volt meter and no load and the voltage will be high.

David

[malc1]

Hi David
I was just a bit worried about feeding the 8700 with too many volts and was wondering about the Duralites 0.7 volt drop.
Is mine working as it should do?
I see what you`re saying about the load and no load voltage on the duralite regulators but I`m using a device that was made by a guy over in Germany.I`m not sure if the load/no load situation is the same on this unit.
Anyway if you think that the JR servo will be ok with supplied voltage then I`ll give it a try.