Receivers - Range - Low/High Banded

[Wayne Galligan]

He retuned a PCM receiver I had and the ground range check more then
doubled....GOOD idea  to spend $30 bucks vs. losing a $2000 airplane.

Wayne G.

----- Original Message ----- 
From: "Keith Hoard" <khoard at midsouth.rr.com>
To: <discussion at nsrca.org>
Sent: Tuesday, November 18, 2003 10:27 AM
Subject: Re: Receivers - Range - Low/High Banded


> I think I'd let Tony Stillman do the turning of the potentiometer. . . .
> 
> 
> Keith L. Hoard
> Cordova, TN
> khoard at midsouth.rr.com
> 
> 
> ----- Original Message ----- 
> From: "Brian Young" <b4598070 at yahoo.com>
> To: <discussion at nsrca.org>
> Sent: Tuesday, November 18, 2003 9:54 AM
> Subject: Re: Receivers - Range - Low/High Banded
> 
> 
> > My range check was/is at the same field. Same spot at
> > field, similar control cables and rods, similar
> > antennae route. Difference is a glass fuse, wings w/
> > some carbon on the spars, used kevlar rudder cable
> > instead of wire, and weather conditions. The receiver
> > model is identical.
> > 
> > Talked to our electronic engineer at work, his
> > thinking is they tune the circuit to fit the middle of
> > the range, so for low banded receivers 0-24, and Im at
> > the top of the range at channel 24. He suggested I go
> > out and turn the potentiometer to zero in on
> > it....lol....ya right...
> > 
> > Im not to concerned just curious if this makes sense. 
> > 
> > 
> > 
> > --- Wayne Galligan <wgalligan at goodsonacura.com> wrote:
> > > The range dual range on Futaba helps prevent any
> > > range problems that could
> > > occur from slightly misaligned tuning.  I have
> > > jumped several frequencies
> > > with no problem but not more then 3 up or down.   It
> > > is always best to have
> > > it tuned to the specific frequency that you are
> > > using for optimum
> > > performance.   I have used the HiTech receivers and
> > > they don't even specify
> > > a low/high band with good results also with my
> > > Futaba transmitter.  The
> > > lower priced receivers seem to be a little more
> > > sensitive to different types
> > > of interference.  Your range can vary depending on
> > > your setup, engine
> > > resonance, materials in construction, metal to metal
> > > noises, length of wire
> > > leads, shortened antennas... on and on.    I have
> > > experienced problems with
> > > carbon fiber fuse that had metal pull/pull wires. 
> > > And when I went to a
> > > pushrod and kevlar the problem went away.  When
> > > range checking make sure you
> > > are not any where near a metal table or metal fence
> > > post, flag pole, etc.
> > > I have had people hold my airplane that I think
> > > caused reduce range due to
> > > their magnetic personality...heh! heh!  Your mileage
> > > may very.
> > > 
> > > Wayne G.
> > > 
> > > 
> > > 
> > > ----- Original Message ----- 
> > > From: "Brian Young" <b4598070 at yahoo.com>
> > > To: <discussion at nsrca.org>
> > > Sent: Tuesday, November 18, 2003 9:09 AM
> > > Subject: Receivers - Range - Low/High Banded
> > > 
> > > 
> > > > Im interested in learning about the receiver
> > > range.
> > > >
> > > > Recently I had a reciever from Futaba a 149, which
> > > was
> > > > involved in a crash. This receiver had range with
> > > the
> > > > antennae collapsed to 400 feet or better. The
> > > receiver
> > > > was damaged beyond repair, and Futaba Service
> > > center
> > > > offered an exchange at a discount. So I received
> > > the
> > > > new receiver which range checks to 100ft w/
> > > antennae
> > > > collapsed, this is beyond Futabas specification so
> > > I
> > > > fly it. Seems fine. This receiver was received w/
> > > > crystal but was tagged low band. So Futaba has
> > > > receivers available low band/high band so they
> > > dont
> > > > have to stock them w/ crystals. Does this tend to
> > > > compromise the range somewhat for various bands
> > > (ie,
> > > > would range benefit from tuning to the specific
> > > > frequency rather than to a point which perhaps
> > > covers
> > > > a 25 channel range)?
> > > >
> > > >
> > > > (Ive had a similar experience but in reverse on
> > > two
> > > > other receivers.)
> > > >
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