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Old Dec 16, 2002, 06:40 AM
Angelos Gonias
Guest
n/a Posts
My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

Last weekend I discovered that my 9Z-WC in fact transmits a 10th
channel! Channel 10 is non-proportional just like channel 9 and is
permanently assigned to switch-D.

The signal for channel 10 is produced by the PCM decoder chip
(FR6302B) and available inside the receiver. It can be accessible
externally with an easy and inexpensive modification. All you need is
a 470 Ohm resistor, a 470pF capacitor and a servo socket. I have
updated my website with details on how to obtain this 10th channel
from you PCM receiver. You will find a photo of my modified FP-R129DP
in the DIY page and a brief description in the service menu section.

So why didn't Futaba call it 10Z?

Regards,
Angelos
www.model-gadgets.com
Old Dec 16, 2002, 07:32 AM
Greg Middleton
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

On 16 Dec 2002 03:40:59 -0800, angelos@model-gadgets.com (Angelos
Gonias) wrote:

>Last weekend I discovered that my 9Z-WC in fact transmits a 10th
>channel! Channel 10 is non-proportional just like channel 9 and is
>permanently assigned to switch-D.
>
>The signal for channel 10 is produced by the PCM decoder chip
>(FR6302B) and available inside the receiver. It can be accessible
>externally with an easy and inexpensive modification. All you need is
>a 470 Ohm resistor, a 470pF capacitor and a servo socket. I have
>updated my website with details on how to obtain this 10th channel
>from you PCM receiver. You will find a photo of my modified FP-R129DP
>in the DIY page and a brief description in the service menu section.
>
>So why didn't Futaba call it 10Z?


Because the 10Z will cost 200 more ?

Greg
Old Dec 17, 2002, 12:05 AM
Steve
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

On 16 Dec 2002 03:40:59 -0800, angelos@model-gadgets.com (Angelos
Gonias) wrote:

>Last weekend I discovered that my 9Z-WC in fact transmits a 10th
>channel! Channel 10 is non-proportional just like channel 9 and is
>permanently assigned to switch-D.
>
>The signal for channel 10 is produced by the PCM decoder chip
>(FR6302B) and available inside the receiver. It can be accessible
>externally with an easy and inexpensive modification. All you need is
>a 470 Ohm resistor, a 470pF capacitor and a servo socket. I have
>updated my website with details on how to obtain this 10th channel
>from you PCM receiver. You will find a photo of my modified FP-R129DP
>in the DIY page and a brief description in the service menu section.
>
>So why didn't Futaba call it 10Z?
>
>Regards,
>Angelos
>www.model-gadgets.com



Seeing how JR got their 9th and 10th channel proportional, my guess is
that since Futaba couldn't get the 9th channel right (proportional),
they didn't want to advertise that they couldn't get the 10th channel
right either, so they buried it. :-)


Old Dec 17, 2002, 03:52 AM
Wilbur Wilburforce
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

>Seeing how JR got their 9th and 10th channel proportional, my guess is
>that since Futaba couldn't get the 9th channel right (proportional),
>they didn't want to advertise that they couldn't get the 10th channel
>right either, so they buried it. :-)
>


Ahh but that'll be like JR's buried aeroplane & glider software in their "top
of the line" transmitter, or their buried switch assignability
which-ya-daont-really-need. Or their buried technology in their gyros which
stops them drifting worse than a CSM360. Or their buried technology in their
servos that makes them work properly. Or their receivers which you need to put
red loctite in to stop the crystal falling out LOL. But hey you got a
proportional 10th channel so you couldn't care about that, right :-) Tee hee..
Sorry couldn't resist.

Will


Old Dec 17, 2002, 08:30 AM
Paul Nesbitt
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

They probably didn't call it a 10Z because they don't have a 10 channel
RX. I would suspect that since the 9 series has been around a while and
they are (supposedly) planning on replacing it with something with more
channels, they didn't want to spend money developing a 10 channel RX when
they need to develop a 12?, 14?, 20? channel RX for the new flagship
radio.

Just a guess.
Paul

Angelos Gonias wrote:

> Last weekend I discovered that my 9Z-WC in fact transmits a 10th
> channel! Channel 10 is non-proportional just like channel 9 and is
> permanently assigned to switch-D.
>
> The signal for channel 10 is produced by the PCM decoder chip
> (FR6302B) and available inside the receiver. It can be accessible
> externally with an easy and inexpensive modification. All you need is
> a 470 Ohm resistor, a 470pF capacitor and a servo socket. I have
> updated my website with details on how to obtain this 10th channel
> from you PCM receiver. You will find a photo of my modified FP-R129DP
> in the DIY page and a brief description in the service menu section.
>
> So why didn't Futaba call it 10Z?
>
> Regards,
> Angelos
> www.model-gadgets.com


Old Dec 17, 2002, 08:39 AM
Angelos Gonias
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

Steve,
every proportinal channel requires 10 times more data than a simply
on/off channel. JR has indeed more proportinal channes but the servo
possitions are updated less frequently. Futaba has implemeted a quite
smart technique (part of which is cutting functionality of two
channels to just on/off) and they can update the servos 70 times per
second while JR is far behind.

A couple of just on/off channels are fine. They can be used for
retracts, governor on/off, smoke on/off, glow on/off, taking aerial
photos etc.

No, I am not against JR... they are both great radios. I just find
more usefull functionality in the 9Z when someone knows how to program
it.

-Angelos


>
>
> Seeing how JR got their 9th and 10th channel proportional, my guess is
> that since Futaba couldn't get the 9th channel right (proportional),
> they didn't want to advertise that they couldn't get the 10th channel
> right either, so they buried it. :-)

Old Dec 24, 2002, 12:32 PM
Steve
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

On 17 Dec 2002 05:39:25 -0800, angelos@model-gadgets.com (Angelos
Gonias) wrote:

>Steve,
>every proportinal channel requires 10 times more data than a simply
>on/off channel. JR has indeed more proportinal channes but the servo
>possitions are updated less frequently. Futaba has implemeted a quite
>smart technique (part of which is cutting functionality of two
>channels to just on/off) and they can update the servos 70 times per
>second while JR is far behind.
>
>A couple of just on/off channels are fine. They can be used for
>retracts, governor on/off, smoke on/off, glow on/off, taking aerial
>photos etc.
>
>No, I am not against JR... they are both great radios. I just find
>more usefull functionality in the 9Z when someone knows how to program
>it.
>
>-Angelos
>


If you need proportional channels, less frequent updating is a very
acceptable tradeoff to get them. I would bet any given pilot will not
be able to tell the difference in the air between updates at 70 times
a second vs 50 times a second, or even less. That resolution far
exceeds what we are capable of differentiating while in the air. And
even if one could tell, the differences would be very slight. I
personally didn't notice the difference when I was swapping back and
forth between the 10X and 9Z on my 40% giles or 35% Cap. They felt
pretty much the same once they were both dialed in.

Conversely, having 8 channels vs 10 channels has much greater impact
with regards to setting up the larger planes. It makes setting up
ganged servos easier and more accurate, it can increase reliability va
redundancy (especially in dual receiver setups), reduce the effects of
voltage depression and loss, etc.I think these effects are more
noticeable and more valuable than more updates per second.

I'm also not against the 10X, nor the 9Z. I own them both, and like
them both for different reasons. I am comfortable with programming
both radios, and have done some very complex setups on both of them,
such as sharing one channel with two functions linked with 3 mixers
controlled with an on/off switch and using a slider to vary an offset
on/off point mixed to the throttle. That really taxed both radios, but
both were able to perform that configuration. It really says a lot
about how flexible the upper end radios really are.

Just my opinion.

Stephen
www.GiantScaleRC.com
Old Dec 25, 2002, 06:12 PM
elossam
Guest
n/a Posts
Re: My 10 channel Futaba transmitter! Yes, it is in fact a 10Z!

As far as I know Futaba suplies the 149Dp receiver with 9 or 10
channels (using the DSC port as 10th channel servo output). All the
149dp ones comes with 9 channels and you must request for the 10th ch.
modification before ordering it as it must be factory done. Do anyone
know wich kind of modification are they doing. May be they only
solders the two components Angels place in his web and jumps the
conections to the DSC port but have never see it.
Elossam
 


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