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<DIV dir=ltr align=left><SPAN class=525431315-16022008><FONT face=Arial
color=#0000ff>another solution to dual batteries is Vanpowers dual batter
voltage regulator</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=525431315-16022008><FONT face=Arial
color=#0000ff></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=525431315-16022008><FONT face=Arial
color=#0000ff><A
href="http://vampowerpro.com/store/pid_214.htm">http://vampowerpro.com/store/pid_214.htm</A></FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma><B>From:</B> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of </B>Ed
Alt<BR><B>Sent:</B> Saturday, February 16, 2008 8:09 AM<BR><B>To:</B>
vicenterc@comcast.net; NSRCA Mailing List<BR><B>Subject:</B> Re:
[NSRCA-discussion] Spektrum AR9100 RX<BR></FONT><BR></DIV>
<DIV></DIV>Vince:<BR>It's a near certainty that they designed it to isolate the
battery inputs with separate, redundant FETs to switch them on/off, beause if
they did not, it would most likely mean that the batteries would be
sharing a common internal bus. You can get away with that with NiCad, NiMH
packs and also with LiPo's that happen to be evenly matched and evenly
charged. However, it's a bad idea with LiPos because there is too
much of a chance that someone would make a mistake and "poof". So even
without opening one up or drilling a Horizon tech for details, it's a pretty
safe bet that they've got isolated inputs that also provide switching
redundancy. <BR> <BR>I plan to get one at some time soon and I can
figure it out without even opening it up. I don't expect any
issues.<BR> <BR>Ed<BR><BR><BR>
<BLOCKQUOTE>
<HR>
From: vicenterc@comcast.net<BR>To: nsrca-discussion@lists.nsrca.org;
nsrca-discussion@lists.nsrca.org<BR>CC: ed_alt@hotmail.com<BR>Subject: Re:
[NSRCA-discussion] Spektrum AR9100 RX<BR>Date: Sat, 16 Feb 2008 13:29:29
+0000<BR><BR>
<DIV>Ed,</DIV>
<DIV> </DIV>
<DIV>You just asked the question that I wanted to ask. How this RX
handle one battery failure? I think the premium cost will make
sense if this RX really has that feature already as you described (plus the
soft switch). I think we could save a lot of weight replacing the heavy
duty pig tails and use this RX for pattern. The information in the web
site is not clear to me. Probably Troy can help us to find this
information using his contacts.</DIV>
<DIV> </DIV>
<DIV>--<BR>Vicente "Vince" Bortone</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>From: Ed Alt <ed_alt@hotmail.com>
<BR>
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Vince:<BR> <BR>Receivers usually have their own voltage regulation for
the receiver / decoder circuitry, but pass the voltage level at the input
directly to the bus that the servos are on. The main difference
with the AR9100 re. power management is that has a much more robust
connector system to handle high current loads, and ofcourse it has a
softwitch. That amounts to adding a power FET(s) of some type that's
controlled by the on / off switch. Having never seen one (yet), I
would hope and assume that they have at least a pair of FETs feeding a
common output bus, one each for each battery input so that if one fails,
things keep running on #2. <BR> <BR>The thing is, for Pattern
applications, you already have a dual regulator arrangement that does what
you need. The AR9100 adds no particular advantage and as Troy points
out, it's bigger & heavier than it needs to be. For a large gasser
with a dozen or so thirsty servos, it's a g ood idea. This is mainly
because it eliminates the "choke point" current limitation of the standard
servo connectors that other receivers have for bettery
connections.<BR> <BR>Ed<BR><BR><BR>
<BLOCKQUOTE>
<HR>
From: vicenterc@comcast.net<BR>To:
nsrca-discussion@lists.nsrca.org<BR>Date: Sat, 16 Feb 2008 12:39:28
+0000<BR>Subject: Re: [NSRCA-discussion] Spektrum AR9100 RX<BR><BR>
<DIV>Troy,</DIV>
<DIV> </DIV>
<DIV>The reason I would like to try the AR9100 RX in my
pattern planes is that I am using two LiPo 910 mah now. I like
the idea to have a backup battery. Yes, I will need to use a
regulator because of the servos but it appears that the RX does not need
regulator. I know that I don't need the heavy wire for the
application. It will be nice that they make one with JR/FUB
plugs. </DIV>
<DIV> </DIV>
<DIV>I was thinking that I can replace the wire with pig tails my
self. For sure I will go ahead and get one AR9100 for my big
gasser.</DIV>
<DIV> </DIV>
<DIV>What is the difference between 921 and the 9000? I guess is
just brand-name but want to make sure before investing.</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV> </DIV>
<DIV>--<BR>Vicente "Vince" Bortone</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>From: "Troy A. Newman"
<troy_newman@msn.com> <BR>
<STYLE></STYLE>
<DIV>Vince,</DIV>
<DIV> </DIV>
<DIV>the 9100 RX is designed around High current draw applications. Our
models don't really require that. The RX is heavier than the 921 or 9000
RX's and part of that is the large battery leads serving the RX. I
suppose you could use it but you are not going to be gaining much. Its
designed around the larger applications that are 33% plus or in things
like Jets with a large number of servos with higher stress
applications.</DIV>
<DIV> </DIV>
<DIV>Our pattern models are drawing power in the 1.5-2amps max...this is
peak and worst case usually. I have done some testing to make sure I'm
carrying a good battery supply. Using a 1650nimh or 2300nimh on 4.8V is
working for me in even the Bipes...Another good solution is the Jaccio
regulator with a lipo or Li-ion at about 2000-2400mah capacity....</DIV>
<DIV> </DIV>
<DIV>The 9100 RX is designed around models that might be using (5-6)
8711 servos or even more...and could be pulling upwards of 2-3-4amps or
more.</DIV>
<DIV> </DIV>
<DIV>At these currents and loads the normal RX switch and lead from a
switch to the RX is not sufficient to carry these high currents for very
long....so the 9100 RX is a solution to this application as it has large
16ga wire leads for power into the RX. This adds benefit in the high
current applications but not really anything to our pattern
models...other than weight.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>I'm flying the 9000 and 921 in all my models now. Would not go any
other way.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Troy Newman</DIV>
<DIV>Team JR</DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=vicenterc@comcast.net
href="mailto:vicenterc@comcast.net">vicenterc@comcast.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA </A></DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, February 15, 2008
6:04 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [NSRCA-discussion]
Spektrum AR9100 RX</DIV>
<DIV><BR></DIV>
<DIV>Hello all,<BR><BR>Just would like to know opinions on this
product. Any one using it? I like the idea of the two batteries input
and the soft switch.<BR><BR><A
href="http://www.horizonhobby.com/Products/Default.aspx?ProdID=SPMAR9100"
target=_blank>http://www.horizonh<WBR>obby.com/<WBR>Products/<WBR>Default.aspx?<WBR>ProdID=SPMAR9100</A><BR><BR>Thanks,<BR><BR>--<BR>Vicente
"Vince" Bortone<BR></DIV>
<HR>
<BR>_______________________________________________<BR>NSRCA-discussion
mailing list<BR><A
href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</A><BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR></BLOCKQUOTE></BLOCKQUOTE>
<BLOCKQUOTE>--Forwarded Message Attachment--<BR>From:
troy_newman@msn.com<BR>To: nsrca-discussion@lists.nsrca.org<BR>Subject:
Re: [NSRCA-discussion] Spektrum AR9100 RX<BR>Date: Sat, 16 Feb 2008
07:11:03 +0000<BR><BR><PRE>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR><A href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target=_blank>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A><BR></PRE></BLOCKQUOTE></BLOCKQUOTE><BR>
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</BLOCKQUOTE>
<BLOCKQUOTE>--Forwarded Message Attachment--<BR>From:
ed_alt@hotmail.com<BR>To: nsrca-discussion@lists.nsrca.org<BR>Subject: Re:
[NSRCA-discussion] Spektrum AR9100 RX<BR>Date: Sat, 16 Feb 2008 13:07:31
+0000<BR><BR><PRE>_______________________________________________<BR>NSRCA-discussion mailing list<BR>NSRCA-discussion@lists.nsrca.org<BR><A href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target=_blank>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A><BR></PRE></BLOCKQUOTE></BLOCKQUOTE><BR>
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