solentlife
For the unbelievable low price of ~10 Euros ......... you can have a medium range tiny FrSky compatible RX for 4ch capable of PWM and PPM.

https://www.banggood.com/2_4G-4CH-Mini-Frsky-D8-Compatible-Receiver-With-PWM-Output-p-1143300.html?rmmds=search&cur_warehouse=CN

I accept it will never compete range wise with the original FrSky 4ch V8R4 RX ... but surely 500m is more than enough for the Parkflyer in us.
It has two advantages (one of which subject to your soldering ability of course) :

Replaceable antenna .. the V8R4 was a soldered bit of wire ... this compatible uses a proper snap on plug antenna - which I intend to Hot Glue 'blob' to ensure it stays on !! 
The V8R4 wire - I was often replacing and meant solder job ... and it had NO shield connection to the board ... as it was in itself the 2.4Ghz length ..
This compatible has a shield connected antenna with bare 2.4Ghz end. If you wanted to - you could use any of the extended shielded FrSky antennas in place of the supplied.

4ch FrSky compat RX.jpg 
For those not familiar with this Rx ... the servo pin block is supplied separate in the package and you can orientate it as you wish .. the pins just press into the end board and you solder the 'back' tips of pins to secure. 
The antenna in the photo is turned to fit in the packet .. but you can swivel it to suit and then I suggest a 'blob' of hot glue to secure against being unplugged.

Here is the interesting bit :

With pins pointing out -  34mm long, 10mm wide, 10mm high + 100mm antenna 

With pins pointing in over the board -  25mm long, 10mm wide, 10mm high + 100mm antenna

The weight ? Here I had trouble as on its own - it did not register on my 1gr increment digital scale .. so I added an item to get a combined weight - then just the additional item ... Both = 43gr, other item flickered 42gr with occasional 43gr. This indicates that the RX weight is UNDER 1 gr !! 

I have heard very good reports on this Rx .. and Youtube is generally supportive of it. I shall be using these in basic Parkfly foamies as price is extremely attractive and performance is enough.

A flight test will be uploaded once done ... but I don't really expect any mishaps other than my bad flying !! 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
I need to get out with mine too for a test with it in the Lidl glider - should be perfect for that.

Been a bit too breezy today so been building an F22 v2 instead - been a long time since I built a park jet!!
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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solentlife
So much for the excitement ............. 

I have 9x and 9xr with FrSky ACCSST DJT and V8JT modules ........... I have tried binding the Rx's and nothing ... I even tried the Motive RC R8 ... nothing.

HELP !!!! I followed every single instruction ..... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
Sounds odd - it bound fine for me in D8 mode on the Taranis.  Although as a thought, try moving the RX away from the Tx when you're binding as it could possibly swamp it being close up.

Other than that I just set the Tx into bind, powered up the Rx with the bind button pressed and waited a second or so.  De-powered the Rx, switched off the bind mode, powered the Rx back up and it was active straight away.
Same process on the Motive RC one too...
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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solentlife
I have a suspicion that the Taranis may be a bit more compatible for these items ... maybe something in the 9x / 9xr is not so ??

I've ordered a UAV Multi Module to fit into one of my TX's ... its on special offer on Banggood for next few days .... this may help me .. if it does then I will start looking at this solution overall ... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
As long as your module is running D8 mode it should be fine - certainly nothing special from this end for that side of things.

The DJT module I have in the 9XR is essentially the same as in the Taranis when in D8 mode so should be no different at all.
Have you tried the bind with a few feet between the Tx and Rx just in case?  I tend to keep them separated when I'm binding as a force of habit now to prevent the swamping that the D8 protocol can sometimes suffer from.
Also with the mini receiver try and get the antenna 90 degrees to the Tx one as it can struggle a bit as there's no diversity being a single antenna 👍
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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solentlife
Tried all that ... R8 and the minis ... NOTHING ! I even thought maybe the 5V supply was weak ... tried other .. NOTHING.

I just hope now that the Multi Module can sort this as I would really like to be able to buy these RX's being real budget and just right size to go in Parkflyers etc.
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
Does sound really odd though - can't think of a reason why it won't bind at all.
Will test with my 9XR in a bit on one of the MotiveRC ones to see how that gets on as it's got a DJT module I built into it...
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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Sterling101
Just tried it with my 9XR pro and bound no problems with the MotiveRC Rx.

Powered up the 9XR with the DJT bind button pressed.  Waited for the beeps to start then powered up the Rx with the FS button pressed.
Rx started flashing red and green (bind complete) almost immediately so powered off the 9XR and the Rx started flashing slow red (loss of signal).
Powered back up the 9XR and it had bound spot on.
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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solentlife
I would like to check a few things ............. 

The 4ch manual on BG says that you power Rx and then press BIND button ... ?? Surely this cannot be right ... Youtube videos and logic says to Press and HOLD Bind button while powering on and wait for lock before releasing ??

The R8 RX manual also has me questioning ... 

It says to set mode - you press the F/S button on side to set mode 1, 2, 3 or 4 ... I assume that my D8 needs mode 1 with 1 LED flash ... 
The manual says to press and scroll till you have required mode ... mine being 1 .. then give a quick press ??? That immediately changes it to mode 2 when I do that .. 
With the R8 ... do I set to mode 1 and keep button pressed or do I let it go and have R8 flashing one flash repeatedly till it binds ?

Can the CORRECT method be posted please to clear this up ?? 

(I've tried all ways including pressed and hold .. let go ... all 4 modes ... nothing !! )
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
I've not bothered changing modes on the R8 so just I held the FS button while powering on and it goes into bind mode straight away.
Did the same on the 4CH but because it's a bit more basic there's no real feedback to say it's bound so just waited a few seconds and did the same as the R8 and it had bound fine.
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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solentlife
Question .. your 9xr beeps when in Bind mode ??? None of mine do.

R8 ... you said :  " just I held the FS button while powering on and it goes into bind mode straight away."  Did you hold the bind button all the time or did you just hold it while powering and then let button go ... leaving it in bind mode ?

Nothing's worked with me ... 
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
Yep, my DJT module inside the 9XR beeps when it's in bind mode - thought they all did that?

On the R8 I held the FS button, powered it up then let go as it had bound straight away but I don't think you need to keep it held down at all.
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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solentlife
OK .. I now found the reason for not binding ...

The V8JT module will not bind out of box as its an early one without Telemetry ...

The DJT has two switches on the module that you can select telemetry or not as well as other settings.
I do not use Telemetry and therefore had Switch 1 OFF ... Switch 2 ON ... this disables Telemetry .... THIS was the problem.

Sterling 101 : Your mentioning no problem binding once the 9xr was beeping ................ my 9x and 9xr's don't beep when binding .... then I recalled hearing a beep when I got first module years ago ...

I set to Telemetry mode by both switches OFF and bingo ... Tx beep beep and everything bound straight away !

The DJT module doesn't beep in bind mode if Telemetry is disabled.

OK ... now onto a strange bit :

The 4ch sets up as ch 1 Ail - ch 2 Elev - ch 3 Thr - ch 4 Rud ............. exactly as I expect and same as all my FrSky stuff.

But the R8 has a weird set up and took time to find which ch for what ending up as :

ch 1 Thr - Ch 2 Rud - Ch 3 Ail - Ch 4 Ele - Ch 5 Gear ....6 .. 7 .. 8 didn't go any further as each time I set one of them - it seemed to interfere with another. I will have to be careful setting up a model !! 

Sterling 101 .... can you give us what function against what ch you have ?? I tried swapping assignments and also the stick setting but Rx didn't care - that's what came out.
I'll fly anything if I can launch it ! Youtube : solentlifeuk
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Sterling101
Can't see why the difference in channel assignments are happening - I thought that was do to with the Tx mixer config?
My usual mappings are the standard AETR setup so ch1 Ail - ch2 Ele - ch3 Thr - ch4 Rud.
Only different one I've ever had was on a Spektrum Rx I setup on the MultiModule but that was long long ago on my mates Tx and had to alter the mix assignments to suit the plane it was in.
Whoever said nothing is impossible had obviously never tried slamming a revolving door...
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