Good value

Name/type

Crystal type

Number
Servo

Price DKR

weight gram

Mode

RF sensitivity dBm/uV

Noise tolerance at power wire

channel width at
–50dBm

channel width at
–70dBm

Mini

4

350

9

PPM

-101dBm/2uV

 

70mVpp for 50% jamming

30.3kHz

 

26.2kHz

Mini

5

395

9

PPM

-102dBm/1.7uV

70mVpp for 50% jamming

27.2kHz

 

23.0kHz

 

HC50 normal

8

525

14

PPM

-107dBm/1uV

252mVpp for 50% jamming

17.3kHz

12.8kHz
MZK-Micro6uP

HC50 normal

 6 300 9

PPM

 -110dBm/0.7uV 30mVpp for 50% jamming 879kHz !!
warning !!		 16.2kHz

HC50 normal

4

260

9

PPM

-103dBm/1.6uV

 

10mVpp for 50% jamming

11.1kHz

 

9.9kHz

 
MZK-Octava HC50 normal 8 540 10

PPM

 -110dBm/0.7uV 113mVpp for 50% jamming 77.3kHz !!
warning !!		 21.1kHz

mini

5

270

2.8

PPM

-103dBm/1.6uV

 

2mVpp for 50% jamming !

not measured

20kHz
MZK-Pico8uP HC50 normal 8 340 12

PPM

 -110dBm/0.7uV 51mVpp for 50% jamming 1217kHz !!
warning !!		 18.6kHz

mini

4

380

7

PPM

-102dBm/1.7uV

 

110mVpp for 50% jamming

29.9kHz

 

20.8kHz

 
MZK-Sexta HC50 normal 6 450 10 PPM -108dBm/0.8uV 99mVpp for 50% jamming 51.8kHz !!
warning !!		 19.2kHz

Dynam R6P

 HC50 normal

6(8)

120

8,5

 PPM

-106dBm/1.1uV

 650mVpp for 50% jamming

20.3kHz

18.0kHz

Dynam6ch

HC50 normal

6

??

14(10)

PPM

-105dBm/1.2uV

248mVpp for 50% jamming

 2000kHz !!
warning !!		  700kHz !!
warning !!
Good value

Name/type

Crystal type

Number
Servo

Price DKR

weight gram

Mode

RF sensitivity dBm/uV

Noise tolerance at power wire

channel width at
–50dBm

channel width at
–70dBm
Hyperion HP-DSP*6FS HC50 normal 6 ? 14(10) PPM -107dBm/1uV 97mVpp for 50% jamming 44.2kHz !!
warning !!		 18.1kHz
Hyperion HP-DSP*8FS HC50 normal 8 ? 14(10) PPM -109dBm/0.8uV 97mVpp for 50% jamming 43.0kHz !!
warning !!		 23.5kHz

HC50 normal

6

?

8

PPM

-74dBm/44uV and 84dBm/14uV

?

?

?

none

6(7)

?

18(13)

PPM

-105dBm/1.2uV

3200mVpp for 50% jamming

14.7kHz

12.5kHz
MultiplexRX12
DS IPD		 HC50
MPX DS		 12 900 49(35) PPM -111dBm/0.6uV 18mVpp for 50% jamming 20.0kHz 17.0kHz
MultiplexRX9
DS IPD		 HC50
MPX DS		 9 600 36(22) PPM -115dBm/0.4uV 32mVpp for 50% jamming 26.9kHz 17.9kHz
MultiplexRX9
synth DS IPD		 none 9 995 37(27) PPM -108dBm/0.8uV Total tolerant see txt !! 18.9kHz 16.9kHz

none

7

650

25

PPM

-105dBm/1.2uV

160mVpp for 50% jamming

4.3kHz

4.2kHz

none

7

875

31(23)

PPM

-110dBm/0.7uV

20.7kHz

18.2kHz

none

6

?

14(10)

PPM

-93dBm/4.8uV

650mVpp

12.5kHz

16.4kHz

HC50 normal

7

?350?

15

PPM

-106dBm/1.1uV

89mVpp for 50% jamming

65.7kHz !!
warning !!

29.7kHz

HC50 normal

5

285

10

PPM

-100dBm/2.2uV

57mVpp for 50% jamming

20.4kHz

16.5kHz

HC50 normal

7

350

15

PPM

-110dBm/0.7uV

1170mVpp for 50% jamming

21.0kHz

16.5kHz

HC50 DS

6

375

18(13)

PPM

-104dBm/1.4uV

4350mVpp for 50% forstyr

23.7kHz

17.8kHz

HC50 DS

7

675

35(20)

Q-PCM

-101dBm/2uV

32.1kHz

17.7kHz

HC50 normal

4

313

20

PPM

-106dBm/1.1uV

5000mVpp for minor jamming

65.5kHz !!
warning !!

19.8kHz

HC50 DS

8

395

35(25)

PPM

-104dBm/1.4uV

510mVpp for 50% jamming

22.9kHz

19.1kHz

HC50 normal

5

220

8.6(7.9)

PPM

-99dBm/2.5uV

1360mVpp for 50% jamming

22.6kHz

17.6kHz
Good value

Name/type

Crystal type

Number
Servo

Price DKR

weight gram

Mode

RF sensitivity dBm/uV

Noise tolerance at power wire

channel width at
–50dBm

channel width at
–70dBm

HC50 DS

9

1050

?

PCM 1024

-95dBm/3.9uV

 

?

27.4kHz

 

17.8kHz

 

HC50 DS

8

580

40(25)

PPM

-98dBm/2.8uV

18mV for 50% jamming

23.3kHz

19.0kHz

HC50 DS

8

995

40(25)

PCM 1024

-99dBm/2.5uV

62mV for 50% jamming

25.5kHz

19.6kHz

HC50 normal

8

565

35(25)

PPM

-103dBm/1.6uV

265mVpp for 50% jamming

39.9kHz

34.0kHz

HC50 normal

6

300?

11(9)

PPM

-100dBm/2.2uV

56mV for 50% forstyr Se mod.

22.1kHz

19.0kHz

HC50 normal

7

?

40(30)

PPM

-94dBm/4.4uV

495mVpp for 50% forstyr

22.3kHz

17.7kHz

HC50 normal

6

450

14(10)

PPM

-98dBm/2.5uV

74mVpp for 50% jamming

20.6kHz

17.0kHz

HC50 normal

7

475

18(13)

PPM

-110dBm/0.7uV

630mVpp for 50% jamming

67.3kHz !!
warning !!

23.5kHz

HC50 normal

7

585

18

SPCM 1024

-104dBm/1.4uV

100mVpp for 50% jamming

26.5kHz

22.1kHz

HC50 DS

9

1140

29(18)

SPCM

-104dBm/1.4uV

51mVpp for 50% jamming

25.3kHz

23.1kHz

HC50 DS

9

1095

29(18)

PPM

-108dBm/0.8uV

50mVpp for 50% jamming

23.2kHz

20.3kHz

HC50 normal

8

610

25(15)

PPM

-108dBm/0.8uV

308mVpp for 50% jamming

19.1kHz

18.3kHz
Good value

Name/type

Crystal type

Number
Servo

Price DKR

weight gram

Mode

RF sensitivity dBm/uV

Noise tolerance at power wire

channel width at
–50dBm

channel width at
–70dBm

none

8

442

25

PPM

-108dBm/0.8uV

 

530mVpp for 50% jamming

22.0kHz

19.6kHz

none

6

435

15(11)

PPM

-104dBm/1.4uV
-105dBm/1.2uV

103mV
60mV

28.8kHz
400kHz

22.5kHz
163kHz

HC50 normal

6

?

?

PPM

-88dBm/8.9uV

 

?

29.2kHz

 

18.6kHz

none

8

592 in germany

30(20)

PPM

-102dBm/1.7uV

 

26.8kHz

 

20.5kHz

 

none

8

938 in dk

30(20)

PPM

-107dBm/1uV

29.9kHz

18.3kHz

HC50 normal

4

225kr

11(8)

PPM

-100dBm/2.2uV

800mVpp for 50% jamming

19.1kHz

17.9kHz

HC50 normal

6

250kr

17(13)

PPM

-99dBm/2.5uV

1115mV for 50% jamming

9.1kHz

18.1kHz

Corona RD820

HC50 DS

8

110kr

10.1

PPM

 -106dBm/1.1uV 700mVpp for 50% jamming

242kHz!! warning !!

19.2kHz

Corona RP8D1

none

8

?

11.1(9.8)

PPM

 -116dBm/0.3uV super tolerant

20.0kHz

18.0kHz

E Sky EK2-0420

HC50
normal

7

100kr

15(11)

PPM

 -118dBm/0.3uV 9Vpp for 50% jamming

2MHz!! warning !!

21kHz
MKS PRO-RX8 HC50 normal 8 ? 9.7 PPM -103dBm/1.6uV 900mVpp 22kHz 18kHz
Art Tech ATRXD01 HC50 DS 6 100kr 21(16) PPM -94dBm/4.5uV 2200mVpp 21.1kHz 15.7kHz
Good value

Name/type

Crystal type

Number
Servo

Price DKR

weight gram

Mode

RF sensitivity dBm/uV

Noise tolerance at power wire

channel width at
–50dBm

channel width at
–70dBm
                     
                     

 (Back to my little RC main page)

Explanations:

Good Value:
Best buy, best performance or good performance at low price, (sorry no receivers win on BOTH performance and low price at the same time, at the moment)
Good performance, but some thing perform better or are cheaper.
Average performance at average price,
Bad or low performance, or too expensive compared to the performance,
some bad performance will generate questions and problems when used in wrong types of planes,
note: some bad performers are made like this on purpose to save weight, to be used on special indoor planes,
so they actually perform good to what they are designed to - to be light weight, not to be used outside and not to be used with other transmitters near by.

Choose the right reciever to the right usage, that is your goal, no type will perform perfect on all criterias at the same time.
The Main 6 performance criterias are:
Super leight weight - Super narrow channel - Super sensitive long range - Handle strong radio signals - Cheap - Noise tolerant at power line.
You want all 6 at the same time, but i'm sorry that is impossible, so choose well.

Crystal type:
none is when the receiver uses an internal PLL synthesiser to generate the first osc frequency, so you don't need a crystal -
benefit: you can change the frequency at no extra cost, you get all channels for free.
HS50 normal the HS50 is the housing of the crystal, thick pins that fits into a socket, normal means single conversion standard crystals
DS double super, means the frequency of the crystal is special, you must use original DS crystals that match the brand of the receiver.
MPX DS is Multiplex double super, they use their own special filter frequencies, so they are NOT compatible with other DS types from other brands.

Number
of Servo:
not important, but a good idea is to have at least enough servo plugs avail for the model type you need right now,
and maybe also for your next one. old graupner receivers named each servo direction for a channel, so on a 12 channel receiver you can connect 6 servos.
Today it is most common to name each servo plug for a channel, in real life they are just different timed pulses received on the same radio frequency.
ch one send first, and ch two send, and so on. if you need to know more about this, use google, search for RC  PPM signal timing or look here: http://users.belgacom.net/TX2TX/tx2tx/english/tx2txgb1.htm

Price DKR:
for some price is not an issue, but for many also an interesting parameter to compare, in Danish Kroner divide by 7.5 to get the Euro value.

Weight gram:
with case (without case) if it makes sense, some receivers comes without a case, in this case you will see only one weight number.
On small indoor electric planes weight is in some cases the most important parameter, it is clear that designing a super low weight receiver
will lack on some performance parameters, like noise filtering and gain reduction systems, and channel width, in such case, use extra care when selection the right type,
and use it after the specifications, not outside, and not far away and not together with 5 other planes in the air.

Mode:
PPM is the most common used modulation standard (Pulse Periode Modulation) it can also be digital PCM or SPCM or PCM1024.
All PPM systems are compatible, but be careful with any digital PCM mode, they are normally only one brand compatible

RF sensitivity dBm/uV:
both represented in dBm and in voltage, better sensitivity means a lower input signal was needed for 50% signal to noise ratio (10dB SINAD)
a -110dBm receiver is 6dB better than a -104dBm type, for each 6dB better sensitivity you will get double the range -
if you don't have any other factors like noise on the power supply line. If you have a receiver with less than -90dBm sensitivity
you will have a 500-800 meter range with most transmitters, this will give flips and range problems..
suggestions: always look for at least -100dBm if you fly outside.


RF signal generator adjusted at centre frequency with best sensitivity, then signal strength is decreased until 50% signal/noise is seen on scope.
This is easy to re-produce and to see on any scope, accuracy from day to day measurements +/- 2dB.
Else I would need access to a real signal to noise ratio meter. forget it, not worth the money for this equipment.

Noise tolerance at power wire
the most important parameter in electric planes, but sometimes also in gasoline planes if you get noise from ignition systems,
or even (digital) servos can inject unwanted noise into the receiver power line.
Higher value is better, this is the recorded level where I got 50% signal to noise ratio at -90dBm RF input.
I have some general levels from problematic real life planes, then I measured the receivers and changed to better,
so I know if they can only handle 70-100mVpp of 455kHz injected into the +5V line, you will get flips and range problems on many electric planes.

channel width at –50dBm
the channel width is measured to get the absolutely most wide result.
not like the most common way at -3dB at each side of the filter.

The reason I do it this way is I want to find the good and the bad receivers, not to pass them all as ok if they are really not.
-50dBm is chosen as the most strong signal, I have made a few tests and found this level at 3-6 meters away from transmitters,
so it can and will happen in real life. If the width is much wider at -50dBm compared to the -70dBm width, we have either a bad filter
or a bad / not implemented AGC (automatic gain control) so the first stage will be blocked or over drive of the filter.
We all know the channel spacing we use on the 35MHz band is 10kHz,
and the filter width I measure is often 20 to 30kHz, so you will be able to get noise or jammed if your pals are one or two channels from your channel,
and if they are closer to your plane, than you are. This limitation is normal and should be considered by all users.
 

channel width at –70dBm
signal input level lowered 20dB, then we see the width again, at this rather weak signal level it is impossible to overdrive input gain stages.
Wider = bigger number, is worse result.

-------------------------------------------------------------

All receivers are either my own, or borrowed from several RC shops, or donated to me for the time it take to do all this work.
some was borrowed from private persons, in any case thanks to all persons who helped me.
Measure results with alarming bad results are marked with BOLD.
Use all results with care, you can not say one is better than the other, without also comparing the usage of it.

I am still open for new receivers, that are not on my list,
contact me to find out how to help me and the rest of the world. The best way to get your receivers on this list it to simply send it to me for keeps,
Then I will measure it, and test it, and donate it for beginners and club projects in my local RC plane club.

WHY I did this list ???
I was tired of all sorts of un-documented results written on many RC forums,
when some ask: what kind of RX should I choose for plane X ?
then he will get 10 different results, and often many says, RX Y is bad, I just had a crash with one, don't use it, you name it.
THIS list is the cold technical facts, and can be re-made all over the world by technical freaks with access to:
RF signal generator, sine wave generator, scope, 5V power supply.
The whole idea of the testing is to show the differences.
I or anyone else can easily setup some tests that will show them all to be perfect :-) but boring and not useful at all.
This is why I push them to the limit and do strange stuff to show the technical differences.

We all know many other factors play in the real life radio control (good/bad) performance:
bad noisy motor regulators, bad RX batteries, bad servo power decoupling, low TX power, frequency miss-alignment,
bad crystals, wrong crystals, antenna routing, rx mounted too close to motor or regulator or other electronics,
atmospheric interference, radio noise from military and other broadcast can travel on a bad day 2-8000 km !,
nulling/doubling phasing due to reflections on ground and other things nearby. Even servos can generate power noise directly into the RX,
this is worse on some digital types.

Yours: Thomas Scherrer OZ2CPU, This version last updated: November the 10th 2008