Receivers - Range - Low/High Banded

[Keith Hoard]

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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