Receivers - Range - Low/High Banded

[Brian Young]

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.)
> >
> > __________________________________
> > Do you Yahoo!?
> > Protect your identity with Yahoo! Mail
> AddressGuard
> > http://antispam.yahoo.com/whatsnewfree
> > =====================================
> > # To be removed from this list, send a message to
> > # discussion-request at nsrca.org
> > # and put leave discussion on the first line of
> the body.
> > #
> >
> >
> >
> 
> 
> =====================================
> # To be removed from this list, send a message to 
> # discussion-request at nsrca.org
> # and put leave discussion on the first line of the
> body.
> #
> 


__________________________________
Do you Yahoo!?
Protect your identity with Yahoo! Mail AddressGuard
http://antispam.yahoo.com/whatsnewfree
=====================================
# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#