HobbyKing FrSky 2.4 GHz Futaba Module mod for Hitec Optic6

Got a Hitec Optic 6 to convert for 2.4 GHz use then purchased a compatible FrSky 2.4 GHz Futaba module from HobbyKing but made some modifications to the module to make it more "useful" for the Optic 6.

This video show how to change the antenna mount for proper RF propagation.

Just came back from field using the single antenna 4 ch Rx. No detected glitching using either antennas flying my normal distance and height ... hi-gains look cool though.

Modifying your module will void the warranty - so please proceed at your own risk.

[tsisapik]

@zhred Using a washer is up to you. Reason I used a washer is that the alternate "hole" is a slot (see 2:50) and the washer makes sure the bottom of the antenna mount firmly holds on to something solid. If the antenna mount moves or turns, the delicate coax wire could be damaged internally.

FYI - I also have the EasyStar and the Wingdragon - my very early rc models. I crashed them headlong so many times their noses are badly deformed but surprisingly still in one piece.

[tsisapik]

@JelleBoomstra You are right, an omni propagates from the base (ground) radiating upwards therefore an upside down antenna would "cover" the grass very well indeed. Any omni will have the "blind spot", but the model is constantly moving so does it matter? Last I checked, a higher dB gain antenna (less loss etc.) could increase ERP 2x at least vs stock (bigger doughnut!) - now who would not like that? I'll post my field test/s soon .... Thank you for your comments and fly safe!

[tsisapik]

What I understand about PPM encoders is that they convert PWM to PPM. The radio already produces PPM signals which are fed to the RF module.

[tsisapik]

@Qbus245 Thanks for dropping by and I hope the video helped in any way !

[tsisapik]

@zhred That's interesting - I have the FrSky V8FR/DBR and Corona CR8/6D rx's but have not range tested those to their max distances. Going out 1+ km is serious FPV and it looks like the FrSky would be more than adequate and at those distances you need two people or a "flagging" device to test. Good luck on your test!

[tsisapik]

@witooa The Hitec 2.4 Ghz Spectra module (Eclipse 7, Optic 6, Prism 7 compatible) that is a drop in replacement for the 72 Mhz Spectra already has the stock antenna connector in the right orientation so there was no need mod anything. I know there is another Spectra 2.4 Ghz module with a different antenna configuration - I do not have this particular module and cannot comment on it .... sorry.

[tsisapik]

They still have modules .. check this out at the HK site ... "FrSky DHT 8ch DIY Telemetry Compatible Transmitter Module" ...

[tsisapik]

@innervoid375m Thanks for dropping by! I picked a pair from a computer show and bought another pair on Ebay. Be sure you get the antenna with the correct connector (I think these are SMA types but don't quote me... ) You got a really cool channel by the way. Regards and fly safe!

[witooa]

Hi Good video can I change the hitec Aurora 9 the same way.Regards Allan

[zyzo]

Just have found old Hitec Flash 5 and think about 2.4 GH conversion, FrSky modules discountinued unfortunatelly...

[innervoidm]

Nice mod ! Where do you get the higher gain antenna ?

[tsisapik]

@zhred Some people have been reporting ranges of about 1.2 kms in the air but 400 meters (ground distance) is quite good considering AMA regulations specify a ceiling of 400 feet in the air.

Unless you want to go serious FPV (wireless video, OSD w/ GPS, etc.), I would think 400 meters is pretty good - to be honest, I would not be able to judge model orientation from 200 meters of say a J-power 50 mm F-35 EDF - let alone 400 mtrs.

[sm]

can i use it with my 8ch pic based ppm encoder???

[jakecrist]

one i want to update to 2.4 now can i use my 6 ch res they are flyski 6ch will they work with 8ch controler

[tsisapik]

@jbx907 Walang anuman boss para lang makatulong !!!!

[JelleBoomstra]

perhaps a backward antenna looks a bit foolish, the way you propose to use a higher gain antenna is just as foolish: That omni directional antenna is not as omni-directional as you are thinking. It radiates in a kind of doughnut fashion centered around the axis of the antenna. The way you demonstrate it, the tip of the antenna points at the plane you are flying. This will be in the low radiation zone for that antenna. Either point your antenna up or down or use a lower gain antenna!