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Old 04-22-2010, 12:40 PM   #46
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Default success ..and failure

I installed one of these in an old Futaba Conquest FP-T5NLH ..
installed switch to select between FM or 2.4 -for some reason had to use a dual-pole switch to re-route +positive as well as the PPM signal on this transmitter.

so the module worked excellent for a few weeks, maximum of 4 hours use.. drawing barely any current, compared to the FM module's 400mah hunger.

Then, during use, I too saw the transmitter voltage drop to almost nothing..
after maybe 1 minute the signal would drop, and the LED would extinguish..
it was the overheat failsafe. I checked to ensure connections were good still, antenna coaxial both correct, no shorts.. the module was now drawing over 500mah, and heating within seconds. blowing just slightly on it would allow it to function, but still consumed way too much electricity.

I'm not sure what is the cause of this. I removed the shrink-wrap to inspect for any shorts.. found nothing. sent it in (back to Hong Kong $) yesterday to HobbyKing for an RMA .. hope they respect it.

I was planning to purchase another of these for my 2PL, as well as find a newer used 5ch+ FM transmitter to upgrade.. now I'm not so sure

on a sidenote, the other Corona synthesised receiver I got works superbly with the Conquest on FM meanwhile. also, it connects almost immediately, without the delay or retry of the 2.4.
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Old 05-30-2010, 01:41 AM   #47
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There is an Assan DIY kit on there aswell, I only just found it there.

http://www.hobbycity.com/hobbycity/s...dule_(PPM_Only)
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Old 05-30-2010, 01:43 PM   #48
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very interesting indeed.

be kinda funny to take a wideband 'A' model futaba and convert it in hidden form. the radio as it is now is technically illegal in the eyes of the FCC. still be neat idea.

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Old 05-30-2010, 04:06 PM   #49
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Does anyone know if you could use the Corona DIY kit on an existing 2.4GHz system? I want to get a cheap 2.4GHz system and converting it to the Corona system because ther Rx are so cheap.
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Old 05-30-2010, 04:32 PM   #50
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I know it's possible on the JR DX2 - internally, they're identically to the XS3, except with a 2.4ghz daughterboard instead of an FM synthesised one.
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Old 05-31-2010, 04:34 AM   #51
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Great thanks for the info.
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Old 05-31-2010, 06:36 AM   #52
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This is a very interesting idea. Has anyone completed the conversion on an EX-5? I actually have several old KO radios that I absolutely love. If I could have them with the glitch free performance of 2.4ghz then I would start using them again. Plus I have some Vintage RC nut friends that would just love it if this worked.

Edit: Also is Hobby King the only place to get the kit? Are they reputable?
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Old 05-31-2010, 05:01 PM   #53
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I've used RC-Fans88 for a few orders now (Corona gear mainly) and would recommend them.

Hobby King are fine to order from too.
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Old 06-03-2010, 05:21 PM   #54
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Anyone taken internals from Flysky GT2 2.4Ghz 2Ch Tx & Rx and moved it into another radio?
I have a Acoms Technisport 2.4ghz radio that won't bind to the receiver, it's a common fault with them radios.
Bought one of the Flysky GT2 for the kids. Works good, so you think it's possible?
http://www.hobbycity.com/hobbycity/s...z_2Ch_Tx_&_Rx_

I'm ofcourse talking about 2.4ghz module and leave rest as it was...

Last edited by RossoTorro; 06-03-2010 at 05:32 PM. Reason: adding text
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Old 07-13-2010, 09:42 PM   #55
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I just discovered this from a buddy that told me about it for his planes. I want to convert my XS3 using the 2.4 board from a DX2 or 3 so that I can use standard DSM rxs.

My only question so far is how will swapping to the 2.4 gear(either spectrum or this Corona) affect the multi model of the XS3? Will I still be able to use a different model on the Tx for each vehicle, or would it make it a single model radio? And will I have to rebind each time I switch from vehicle to the other?

Thanks for all the great info here and the ideas so far.
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Old 07-13-2010, 11:09 PM   #56
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Yeah, multi-model still works.

The 2.4ghz module (either Corona or DX2) simply handles the radio waves.

The 'brains' of the radio (memory, steering, etc) remain the same.

The hardware of the DX2 is actually identical to the XS3, except for the transmitter module (FM for the XS3 and 2.4ghz for the DX2).

FYI, I believe the Corona is a higher tech 2.4ghz module. It transmits on 2 different wavelengths while the DX2 I believe only does 1. Probably not a big deal for cars but might make a difference for aircraft.
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Old 07-14-2010, 07:51 AM   #57
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Thats kind of how I thought it worked. Thanks for the info!

One more question, since as you said the 'brains stay the same' will a dx2.0 transmitter board still allow the use of the radios 3rd channel? Seems like it would but not sure if the board would be 'limited' to broadcasting 2 channels or not. Hope that makes sense...

Thanks for the help, now to find a broken spectrum radio.
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Old 07-14-2010, 04:30 PM   #58
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It should do.

All the channel signals are sent through a single wire (PPM). The transmitter board simply sends that signal out of the aerial.

It then becomes the receiver's job to decode the channels and decide what to do with them.
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Old 10-01-2010, 02:17 AM   #59
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I have an old JR Alpina PCM that i really like to convert.
Anyone has done it? or would someone tell me where the solder points on this radio.
Thanks
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Old 10-01-2010, 06:19 AM   #60
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be nice to try this on an old futaba attack II or similar vintage radios (early 90s?)
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Last edited by skree; 10-01-2010 at 07:05 PM.
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