Jaccio Perfect Switch Harness (long)

[Atwood, Mark]

Dave,

While I agree with Troy...and run the Airtronics PCM receivers in my planes (you'll like them) I've also had good luck with PPM....I'm inclined to think you may have a loose or fractured crystal.  I've gotten some very flaky reactions from what turned out to be a bad crystal. 

Since you mentioned Jack...I'd suggest you send the receiver in to him (actually send it to Bobby Tom) and have it looked at.   

-Mark 


-----Original Message-----
From:	David Wartel [mailto:d.wartel at comcast.net]
Sent:	Wed 4/21/2004 8:43 PM
To:	discussion at nsrca.org
Cc:	
Subject:	Re: Jaccio Perfect Switch Harness (long)

Thank you for the reply, Troy.

When I said jittery, I meant near the limit of the range check.

I didn't know about the advantages of range checking with PCM. It does sound
like it is a lot more positve. The reason I did not use it is that it never
made sense to me to have the system lock up when it gets hit. It seems it
would be better to have some/intermittent control than none. In fact, that
may have saved my plane the other day.

I will change the extensions to OEM as you suggest. I have the heavy duty
type in now, but they are not OEM.

I totally agree with you regarding the value of a model. The Quest is an
ARF, but still took considerable time to assemble. I also have an all wood
Typhoon that I built from plans that took considerably longer to "assemble!"
And, for me, it is BOTH the money and the time that add to the value of a
plane.

I'll think seriously about getting a PCM receiver. You are persuasive!

Dave
----- Original Message ----- 
From: "Troy Newman" <troy_newman at msn.com>
To: <discussion at nsrca.org>
Sent: Wednesday, April 21, 2004 7:25 PM
Subject: Re: Jaccio Perfect Switch Harness (long)


> David
>
> I have one word for you.....PCM!
>
> Then I'll add a bunch more below!
>
> PCM is better at rejecting interference. It will also lock your range
tests
> in better. Your comment about a little jittery is something I would not
> trust in my own equipment.
>
> Now PPM (FM) stuff is good. But the real question becomes how valuable is
> your model? For me its not the money it takes to put another model into
the
> air. Its the time and energy it takes to put another model in the air.
This
> is regardless of the cost of the model. A $250 arf or a $1100 French
> kit....The end result is it takes hundreds of hours to built trim and
> perfect a model. Is this time worth the extra $50 to run PCM? Another
thing
> you are spending more money on your servos going with digital servos for
> better control right...yet you are looking toward a lower end RX on the
> technology scale. The servos are the link to the control surfaces...but
the
> RX is the link to your finger! There is a reason that all the top pilots
run
> PCM its a better system...It is a more reliable, and better technology.
>
> OK now for the disclaimer....PCM will got out of range and can have
problems
> with range also....but its better at rejection of interference. Also when
> you are range checking things......The PCM gives you a GO or NO-GO
> test....The model will go into failsafe when range testing and the signal
is
> not enough to maintain control. On PPM systems you are left with "HOW much
> jittering (glitching) is acceptable....In PCM system you know if you are
out
> of range or not....
>
> If you range test your equipment to the distance it failsafe....then you
> know right there is the limit....So start up your motor and compare the
> distances.
>
> Another thing we have found in the interference issues is the use of poor
> quality extension leads. digital servos will draw more current regardless
of
> the brand....The use of off brand leads can lead to your models death. The
> higher current demands may not be met by the off brand leads...The
> connectors could be not up to the task.... It surprises me just how big an
> effect poor quality leads really have. I know that both JR and Futaba make
a
> heavy duty lead. I don't know about Airtronics..I would suggest the JR
gold
> HD leads for your extensions.
>
> I have been involved with 5-6 models in the past year that were running
> Generic brand extensions and had radio interference issues...We replaced
the
> leads in the models with high quality OEM leads and the radio problems
> vanished!
>
> Just my personal advice. Not pushing any manufacturer over another just a
> better technology. Better equipment can cost more. But in the end is your
> model worth the extra 5-10% in total cost to be running the equipment that
> gives you the best connection possible. Again its a matter of what the
model
> is worth to you. To me the walk into the field is worth a bunch more than
> the extra detail things that can prevent that walk.
>
> Troy Newman
> Team JR
>
>
> ----- Original Message ----- 
> From: "David Wartel" <d.wartel at comcast.net>
> To: <discussion at nsrca.org>
> Sent: Wednesday, April 21, 2004 3:26 PM
> Subject: Re: Jaccio Perfect Switch Harness (long)
>
>
> > Thanks, Jim and everyone for your suggestions.
> >
> > I've been dabating if this is a subject for the group or not. However my
> > experience here may help other newbie pattern flyers so I'll tell the
> story:
> >
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