9303 2.4 schematic help

[HAL9000]

I just had the antenna boom pull loose from my 9303 2.4 taking the whole wire with it. Does anyone have a pic of the internal radio backplate? I would post a pic pointing to where i believe the wire should go, but apparently the 'kids' have run off with my cameras memory stick and i have no way to download the pic i took.

It looks pretty straightforward - the wire should be soldered (it wasnt) to a fitting on a chip directly in line with the antenna approx 56mm from the antenna base. I'm 99.9% confident this is where to place the wire -- i just want to be sure and get it right before i start soldering.

One other question. Since the radio works w/o the wire, does the short wire just allow range boost and what is the small caliber bullet shaped cone near the tip. Keep in mind, i would not thiink to fly until the wire is placed correctly.

thanks

[marchambault]

Will try to snap a pic later. The antenna is not soldered, it has a fitting which is press fit on the circuit board.

You can see this gold plated fitting on the DX6i (bottom left):

http://www.dimensionengineering.com/appnotes/spektrum_mod/completed2.jpg

[marchambault]

You can use the CX2 antenna available at most Horizon retailers (EFLH1058):

http://www.readyheli.com/EFLB1058_Transmitter_Antenna_2_4GHz_BCX2_p/eflh1058.htm

[HAL9000]

thanks for pic. yep.. you are correct. i thought i could just solder the wire onto the gold plated clip and then plug into the chip. After further inspection, the wire is a coxial cable so i guess soldering it to the fitting is out. I will be contacting horizon. Thanks for the resource.

I was looking for a quick fix as i'm trying to test fly a new TREX600N that was just completed. Terrible timing!???

[747driver]

A quick temporary fix would be using a 2.4GHz router antenna.
I did it just for some hovering.
Was even tempted to make it a permanent fix and use the router's bnc connector to connect the antenna.
Bought 2 X EFLH1058 on eBay ($7.87 each) instead as it will probably happen again...

[HAL9000]

You can use the CX2 antenna available at most Horizon retailers (EFLH1058):

http://www.readyheli.com/EFLB1058_Transmitter_Antenna_2_4GHz_BCX2_p/eflh1058.htm


After receiving a PM asking about the success of the retrofit mod and for all those who have this issue....I purchased the antenna as MARCHAMBAULT suggested, and it has performed without issue just like i would expect from a genuine JR part. One expection was the CX2 antenna was not a 'perfect fit' as it didnt lock down onto the TX like the JR antenna did. It was very close and didnt present any trouble while the the only thing i did to it was to place a piece of heat shrink tape around the base of the antenna- barely overlapping onto the TX to help keep it from rotating on the TX. Hopefully, this will keep it from pulling the wire out of the connector.

Bottom line...$10 well spent.

Thanks for the suggestions.

Joe

[marchambault]

After receiving a PM asking about the success of the retrofit mod and for all those who have this issue....I purchased the antenna as MARCHAMBAULT suggested, and it has performed without issue just like i would expect from a genuine JR part. One expection was the CX2 antenna was not a 'perfect fit' as it didnt lock down onto the TX like the JR antenna did. It was very close and didnt present any trouble while the the only thing i did to it was to place a piece of heat shrink tape around the base of the antenna- barely overlapping onto the TX to help keep it from rotating on the TX. Hopefully, this will keep it from pulling the wire out of the connector.

Bottom line...$10 well spent.

Thanks for the suggestions.

Joe

I'm glad it worked out for you. I recall there's a shim or some other piece (metal??) from the old antenna that has to be used on the new antenna, then it's a perfect fit.

[HAL9000]

Your right about the metal shim/washer. For whatever reason, I could not get it, no matter how much i tried, to get it completely fitted and locked onto tthe Tx. This is not to say that it was loose as it was snug and would probably not work its way loose on its own. The heat shrink was just for piece of mind. Who knows...i may have missed something. Bottom line---still works just like new.

Thanks for the suggestion.