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AR500 Rx

Aerial Orientation.

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Doug Ireland31/12/2008 02:20:00
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Hi Guys,

I've just bought two of these excellent little receivers but am a little confused with the aerial orientation. It says that the two parts should be at 90 deg to each other. As both of them exit the rx case on the same plane how is this acheived? Is the short aerial bent at 90 to the case or do you bend the tip of the longer one?

Frank Skilbeck31/12/2008 08:58:00
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Not got an AR500 but from what i understand the last 3cm is effectivelly the aerial, so position the last 3cm of the longer aerial at 90 deg to the shorter one.
winchweight31/12/2008 09:11:00
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It's like Frank says.

The first aerial is the short one attached to the box, the end of the long lead is another one, which can be turned to be positioned at 90 degrees. In my Tucano I have the box aerial in the belly, orientated so the short aerial is fore / aft, the long lead then curves away and is secured across the fuselage left / right against a fuselage former.

Doug Ireland31/12/2008 09:24:00
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Thanks guys.
Tim Mackey31/12/2008 10:31:00
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Frank and Shaun are spot on.
Pete Norris10/02/2009 18:42:29
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guys  can  i use the   AR500 in a   63inch  P40 Pete
Tim Mackey10/02/2009 19:01:29
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yes...its full range - assuming you can get away with the channel count - 5th channel is not independent of ailerons
Eric Strefford22/02/2009 16:52:42
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Timbo
 
There are 5 channels with this receiver plus the additional aileron outlet so you can have normal 4 channels plus gear plus additional aileron instead of installing a y lead.
 
Eric
Tim Mackey22/02/2009 17:40:42
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Yes I know.... but I was just trying to explain ( not very well ) that the "extra" aileron channel is effectively just "Y" lead connected internally as opposed to an indepently adjustable separate "channel".
Clive Matthews24/02/2009 10:37:10
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I have 2 of these receivers. To clear up any possible confusion, they are a full 5 channel receiver with 6 servo ports + the battery/bind port. The ports labelled aileron are connected internally and are the same channel. The assumption is that they would be used to connect 2 aileron servos negating the need for a Y-lead. Of course, they could be used for other purposes. The important thing though is not to connect the battery to the aileron port when binding as thiscould overdrive any servo connected to the other aileron port.
Aerials; in my applications, the short aerial comes straight out and the long aerial is fixed (by tape) at 90 degrees.
I have achieved good range with this receiver in a glider, at least as good as a previous 35MHz installation. In my experience, the AR500 doesn't like some digital servos which are happy with an AR7000. I also have one fitted to a 40 sized Thunderbolt with a 52 4 stroke. Not flown yet, but the range test was fine.
Although I have not had any experience of this happening, I would be a little wary of using this receiver in a model with a large engine as the signal could potentially be blocked when flying toward the transmitter. This assumption is based on my personal experience with small wave transmission and the fact that Spektrum make big play on the need for a satellite receiver to increase signal diversity.
Doug Ireland24/02/2009 19:27:38
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Hi Clive, but surely that's the reason for having such a long second antenna; to put as much distance between the two?
 
The reason I'm using the AR500 instead of the stock RD921 was the physical size of the airframe it's sitting in. Tiny in other words.
Clive Matthews24/02/2009 20:08:15
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Hi Doug,
 
I'm sure that you're correct.
 
A small airframe is unlikely to have any problems 'seeing' a signal, however shorter wavelength signals are blocked by solid objects. This is why Spektrum have satellite receivers, to increase signal diversity (a process by which two small dipole antennas are used, combining their results for better effect). I'm not an expert in signal propagation, but as Spektrum have gone to such lengths to tell us that such a system is superior, by definition the AR500 antenna arrangement must be inferior!
 
I've been slope soaring today, 2 models had AR500 receivers. Both performed faultlessly. One, with an electric motor, managed to get a very large distance away, to a point where signal loss might be expected. Signal reception was perfect.
 
The point I was making is that I use and recommend the AR500 wholeheartedly, claiming it to be 'at least as good as a 35MHz installation'. However I would express some reservation at using such a receiver in a large engined model.
Doug Ireland24/02/2009 20:20:51
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Yep, fair comment Clive. In my H9 CAP232G I've got two remotes making 6 aerials total simply because there is plenty of room in the airframe to do it. I've no idea what the range is with the AR500 in my Miss Demeanor (a Peter Miller design) as I'd probably loose sight of it first but to date it ain't let me down!
Peter Jenkins01/03/2009 21:35:53
1602 forum posts
266 photos
I have bought an AR 500 on the understanding that I could attach 2 independent aileron servos.  According to Timbo the two Aileron ports are merely internally linked.  Does anyone know if you can use the Gear port for a second aileron servo?
Tim Mackey01/03/2009 22:57:40
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And Timbo is correct - the 2 ports are merely connected internally just like a Y lead.
However yes you can use the spare gear channel.... here's how to do it.

You need to use either free mix 5 or 6  -  the only mixes where the master's trim will operate on the slave.
1. Set the travel adjustment on the gear to 0 in both positions.

2. Set mix 5 Aile > Gear +100% in both directions.
Now you can independently set the trim on the ailerons by using the sub trim on the aile and gear channels.

 

Peter Jenkins01/03/2009 23:35:54
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Timbo
 
Many thanks.  Just about to hit the sack so will follow your setup directions next week end.
Clive Matthews16/03/2009 23:39:31
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I flew the Thunderbolt with the AR500 receiver today. Absolutely no range problems at all (apart from the old eyes).
 
Interestingly, the range test with this model was at least double the distance achieved against 2 other AR500 receivers. My friends Tribute remained unflown today due to a poor range check. Reception was lost at low power after only 20 paces. We repeated the test with the RX out of the model, with another TX and finally with a 3rd RX which had flown successfully. In all cases, 20 strides was the best range achieved.
 
I spoke to Horizon Hobbies and was assured that this was acceptable as the reduction of power was based on the higher power outputs used in the US. Certainly the RX that had flown showed sufficient range at normal power. Just seems strange that the AR500 in the Thunderbolt had such a good range, we gave up after 50 paces!
 
What range check distances are others getting?
Peter Jenkins17/03/2009 23:57:36
1602 forum posts
266 photos
Timbo
 
Followed your instructions on how to set up separate ailerons on the AR500.  One point I found out was that on my TX (a DSX9) you also need to inhibit the gear function otherwise nothing happens.  Thanks for the rest of the info though and any DSX9 users please note - although you may already be shaking your head and saying "fancy not knowing that!" 
Tim Mackey18/03/2009 00:11:31
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Hi Peter, glad you got it working.
Heres a more comprehensive setup which also allows flaps / spoilers, although I confess that I couldnt quite get the spoileron travel as high as I wanted. This was on my DX7 not my DX6i  - remember that If you want independent adjustment use mix 5 or 6 since those are the only mixes where the master's trim will operate on the slave

1. Set  travel throw on  gear to 0 in both positions.

2. Mix 5 Aile > Gear +100% in both directions.

Now you can independently set the trim on the ailerons by using the sub trims on the 2 channels.

  For flaps or spoilers

1. Set mix 2 Flap>Aile
Rate> 0%
100%

2. Set mix 3 Flap>Gear
Rate> 0%
-100%

Use flap sys to adjust how much travel you want. This does work as flaperons with the 3 position switch. EG for no flaps and 2 different levels of flaps. You also could add another free mix to apply some elevator when the flaps are activated.
 

 (mix Ch5>Ch5 @ 100% to null the gear switch)

 

Edited By Timbo - Moderator on 18/03/2009 00:13:58

Peter Jenkins20/03/2009 21:50:59
1602 forum posts
266 photos
Thanks Timbo. I'll bear that in mind but at the moment I'm planning to use the 9 ch Rx from the DSX9 combo for my Spit which will carry flaps and gear.  I will be buying more AR500s though as they seem to offer terrific value.  Mind you, I've not flown it yet so will have to wait for the proof of the pudding.  Incidentally, it is housed in a Top Gun Bucker Jungmann - a great flying and looking bipe. 

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