Godhelper

Hi Guys,

I recently picked up an Aurora 9 radio - Simply the best value for money in a loong time!
However, i bought one nore receiver besides the one included with the radio and it works perfect. It gives me the four beeps, very quickly, and then it's connected.
But the other Optima 9 does not give me any beeps? It does connect, quickly also, and then it banks all the servo's to almost outer positions and afterwards centering again.

Can someone give me any pointers? Am I doing something wrong?

Regards Kim

A.T.

How are the RX being powered - if both via different ESC/BECcombo, the following may explain:
Optima Transceiver (RX) - Servo Wag When RX Turned On Reason & Prevention of Servo Wag (especially when switching on some ESC) .
suggest using the suppliedswitch harness and a 4.8-6.0 pack as easiest way to link TX/RX on bench before installing in model.
AFHSS - ID-Setup A.K.A, binding or linking & Range Testing Spectra Pro Module <> Optima Receiver
AFHSS - How To Select Optimum Channels - For Your Field may also assist.

Aurora A9, Spectra Pro & Optima - FAQ & Undocumented Features - Mixes, Setups, Tips. {Individual Links often updated}

Regards
Alan T.
Alan's Hobby, Model & RC FAQ Web Links

Godhelper

Hi Alan,

Thanks a lot for Your reply - I am very impressed by this forum. So many nice and helpful people

In both setup's with the Optima 9 receivers there is no ESC or BEC. Just plain and simple 5 cells AA Ni-Mh's.
I will try and re-bind the receiver and see if it changes anything. Do You know if I have to "delete" the already existing "binding" and/or if it's possible?

Another question You might also know the answer to :If I decide to use the SPC opportunity i know that it will NOT power the servo's, but will the 5-cell Ni-Mh "assist" the powering of the RX part, and will it act as "emergency power" if anything would happen to the SPC power?

Is it save to charge the TX battery through the transmitter using my current Jamara X-Peak computer charger? (I have no matching plug for the battery).

Regards Kim

A.T.

First thought would be to swap batteries to verify battery condiition, especially if new new or older than 18 months.
Perhaps also different servo current demands relating tosizes, numbers, binding, bad connections/leads - refer link below.
1. Suggest separate battery for SPC port as fluctuations in that powering the servos would still reflect through SPC port.
Optima Transceiver (RX) - SPC - SPC connection & Lead Detailed plus Optima Current Draw/Amps
["2. The jumper must be in the SPC slot when a BEC or battery is used for both RX and servos plugged into any of the servo channels separately or "Y". a) SPC provides no power to the servos. b) If SPC power supply fails, the receiver stops and as no signal is sent to servos, the servos also stop despite any other power source (BEC/Batteries) plugged into a servo channel. (Aurora A9 - RX Voltage on Screen SPC voltage has preference.)
5. Plugging the same battery with two connections into the servo bus and SPC won't gain you anything... in fact it would be worse as it would put more load on the single connector powering the servos. You would need two separate power sources to take advantage of the SPC and isolated against a voltage sag from the main battery powering the servos which is the primary cause of brownouts. Even a small 2S Lipo would be sufficient for the SPC as it only draws about 80mah.] "
AA NiMH batteries of many brands areunable to maintain volts under sudden loads especially those under 800mAh. Apart fropm Eneloop, AA batteries above 1200 mAh used locally have shown to retain a charge for shorter periods and not accept high loads, especially if fast charged. [AA Nimh as supplied with Hitec RC systems should always be slow charged]. Aurora users can witness the results of abrupt voltage dips on their screens when several servos move at once or sudden heavyloads areapplied. One of several reasons why NiCd are still permitted to be used by emergency services in EU. Two batteries and switch harnesses are better than ever using lead in the nose of a model. Further information on NiMH chemistry/characteristicsprovided Aurora A9 - Battery is not charged. Charge before first use so as not to damage battery. Battery is 1300 mAh_charge rate is 80 mAh (to minimise damage if left on to long at any time) = 19-20 hours for first full charge - please read the further details.

Changing power from Servo side to SPC of an Optima Transceiver does not require relinking/rebinding.
AFHSS - ID-Setup A.K.A, binding or linking & Range Testing Spectra Pro Module <> Optima Receiver

2. Jamara X-Peak is not known but typically a peak detect charger, if charging does comence, would false peak because of the diode within the circuit. Hitec do provide a battery connection lead and the plugs are readily available at most elecitrical stores being almost identical to some computer plugs.
refer detail and pictures:
Aurora A9 - Diode in TX Charge Circuit Never Jump TX Charge Circuit Diode - Hitec FAQ.
Plug and connections pictured at:
Aurora A9 - Eclipse 7, Flash 4&5, Optic 6, Prism 7, Laser etc - Lipol, Field and Fast Charging.
{Users concerned with possible damage to pins soldered to board have reported inserting a connection between battery and it's plug. Plug then remains connected toboard. examples: a). Hitec Male JSTconnector with lead #56211 to battery lead and Hitec Female JST connector with lead #56210 to original battery plug left connected to board. This also permits swapwith many 2S lipo.b).Plugs of aservo extension with yellow lead removed }.

Aurora A9, Spectra Pro & Optima - FAQ & Undocumented Features - Mixes, Setups, Tips. {Individual Links often updated}

See also sub Section "Glitches & Jitter in Receiver, Servo & ESC - causes and cures " under
"Radio Systems, Accessories, Alterations and FAQ." at:
Alan's Hobby, Model & RC FAQ Web Links

Regards
Alan T.

Godhelper

Brilliant info!

Thanks a lot for Your time and effort Alan.