Today's Message Index:
----------------------
1. 05:15 AM - Multiplexer or new antenna (Jeff Bertsch)
2. 06:30 AM - Re: Multiplexer or new antenna (Robert L. Nuckolls, III)
3. 06:32 AM - Re: Multiplexer or new antenna (Kelly McMullen)
4. 09:16 AM - LYC HYIP 3000% ROI IN 24 Hours (btcqatar)
5. 10:36 AM - Question about Z19RB and OVP/Beaker and size wire (Achille)
6. 05:12 PM - Re: Question about Z19RB and OVP/Beaker and size wire (Robert L. Nuckolls, III)
7. 09:26 PM - Re: Multiplexer or new antenna (Jeff Bertsch)
Message 1
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| Subject: | Multiplexer or new antenna |
Hello. =C2-I've added a new comm radio on my RV4. =C2-I currently have
a Comant CI-122 bent whip. =C2-Space is limited on the belly of the RV4.
=C2-Would it be OK to use a multiplexer and share the antenna or try to f
ind a spot for another antenna? =C2-What multiplexer would you recommend?
Thanks.
Jeff Bertsch
Message 2
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| Subject: | Re: Multiplexer or new antenna |
At 07:13 AM 6/12/2017, you wrote:
>Hello. I've added a new comm radio on my RV4. I currently have a
>Comant CI-122 bent whip. Space is limited on the belly of the
>RV4. Would it be OK to use a multiplexer and share the antenna or
>try to find a spot for another antenna? What multiplexer would you recommend?
>
Having two or more appliances share a single antenna
is problematic . . . and as Heinlein noted, "There ain't
no such thing as a free lunch".
There are various ways that the energy being received
or transmitted by an antenna may be split into multiple
pathways . . . but the first effect is attenuation of
said energy(ies). The second consideration is ability
to isolate one pathway from another . . . a transmitter
dumping thousands of milliwatts into the feedline
is a severe performance risk (if not destructive) of
other appliances where a pathway is conducting microwatts
of energy.
There ARE power dividers for driving up to two VOR and
two glideslope receivers from a single VOR antenna . . .
but the performance of ALL receivers downstream of
the signal source is degraded . . . and, of course,
NO transmitters are expected to share this system.
The short answer to your question is no. Separate
antennas go to maintaining both PERFORMANCE and
REDUNDANCY of the two transceivers.
Bob . . .
Message 3
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| Subject: | Re: Multiplexer or new antenna |
Find a place for second antenna. If there isn't room on belly, consider
locations on top of fuselage, or.. I've had success locating a CI-122 on
an inspection plate on underside of a wing. I'm not aware of any
reasonable device that allow sharing a transmitting antenna with
adequate protection from frying the receiver on the other radio.
On 6/12/2017 5:13 AM, Jeff Bertsch wrote:
> Hello. I've added a new comm radio on my RV4. I currently have a
> Comant CI-122 bent whip. Space is limited on the belly of the RV4.
> Would it be OK to use a multiplexer and share the antenna or try to
> find a spot for another antenna? What multiplexer would you recommend?
>
> Thanks.
>
> Jeff Bertsch
Message 4
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=469999#469999
Message 5
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| Subject: | Question about Z19RB and OVP/Beaker and size wire |
Hello all,
I'am new on the forum, and I need some help to restart my plane please. ;)
I started to change my electrical system on my plane. I had single battery, single
old car ignition "Delco" type.
I set now dual battery and two Leburg ignitions and an over-voltage protection
(due to electrical dependance) and I have some question to finish it.
My plane is an IBIS junqua RJ03 (wooden canard layout), looking to wire it with
the Z19/RB.
My main battery is 20ah (into the nose, so I will wire it with 2AWG to starter)
and the aux. small battery 7ah., 30 inch. behind the main bat. but also in the
forward part of the plane.
Bus are quite close to the aux. battery. (30 inch. above) so I take the Z19AB wiring
diagram.
My problems are :
I am not sure about the wires size and fuse/breaker to use, as Bob said it's a
diagram and suggestion. And reading and reading again the chapter about wires
size I keep not very confident to do my choice alone.
1) My cuve facet pumps (main and auxiliary, same model, have a consumption around
1,6amp/one apparently) are 20ft behind buses and switches.
Same things for my ignitions. (It seems to be 0,4amp/each) may I use 14AWG for
fuel pump and 16 awg for ignition ? (4 degrees Celsius only increase of temperature
I calculate, I can take smaller wire not ? But up to what size to be safe,
for my tezfel wire, )
2)I have the OVP kit Bandc.aero and I have to set it close to the alternator o
i can set it close to the switching panel ? (without changing the 5 amp breaker
du to length of the wire ?)
3)I don't know how to wire my bandc-aero OVP kit. they sent me this diagram and
did not succeeded to have another precision:
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z17K.pdf
Problem is that I don't have a dynamo. I have a car alternator of 30A.
Z19Rb don't show the relay and warning light that I have.
Thanks in advance.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=470004#470004
Message 6
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| Subject: | Re: Question about Z19RB and OVP/Beaker and size |
wire
At 12:35 PM 6/12/2017, you wrote:
>
>Hello all,
>
>I'am new on the forum, and I need some help to restart my plane please. ;)
>
> I started to change my electrical system on my plane. I had single
> battery, single old car ignition "Delco" type.
>I set now dual battery and two Leburg ignitions and an over-voltage
>protection (due to electrical dependance) and I have some question
>to finish it.
>
>My plane is an IBIS junqua RJ03 (wooden canard layout), looking to
>wire it with the Z19/RB.
>
>My main battery is 20ah (into the nose, so I will wire it with 2AWG
>to starter) and the aux. small battery 7ah., 30 inch. behind the
>main bat. but also in the forward part of the plane.
>Bus are quite close to the aux. battery. (30 inch. above) so I take
>the Z19AB wiring diagram.
>
>My problems are :
>
>I am not sure about the wires size and fuse/breaker to use, as Bob
>said it's a diagram and suggestion. And reading and reading again
>the chapter about wires size I keep not very confident to do my choice alone.
>
>1) My cuve facet pumps (main and auxiliary, same model, have a
>consumption around 1,6amp/one apparently) are 20ft behind buses and switches.
20AWG wire is 10 milliohms per foot . . . 1.6A x 20
yields a voltage drop of 320 millivolts . . . FOR THE
SUPPLY run. I presume the pump(s) are grounded to the
same fat-wire that runs from main battery(-) to the
crankcase.
>
>
>Same things for my ignitions. (It seems to be 0,4amp/each) may I use
>14AWG for fuel pump and 16 awg for ignition ? (4 degrees Celsius
>only increase of temperature I calculate, I can take smaller wire
>not ? But up to what size to be safe, for my tezfel wire, )
20AWG here too would be quite sufficient.
>2)I have the OVP kit Bandc.aero and I have to set it close to the
>alternator o i can set it close to the switching panel ? (without
>changing the 5 amp breaker du to length of the wire ?)
Install up front close to breaker.
>3)I don't know how to wire my bandc-aero OVP kit. they sent me this
>diagram and did not succeeded to have another precision:
>
>http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z17K.pdf
>
>Problem is that I don't have a dynamo. I have a car alternator of 30A.
>
>Z19Rb don't show the relay and warning light that I have.
Wire as shown in Z-19 . . . you don't need the relay.
BE SURE THAT opening the control wire to your alternator
actually opens the alternator's field supply. Unless
this is true, your alternator may not be compatible
with any form of external overvoltage management.
Bob . . .
Message 7
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| Subject: | Re: Multiplexer or new antenna |
Thanks Kelly.Follow up question... I can put a second comm antenna about 3
feet from the existing antenna, but that will place it about 1 foot from th
e transponder antenna.Would that be OK since the transponder is so much hig
her freq?
Jeff
On Monday, June 12, 2017 8:47 AM, Kelly McMullen <kellym@aviating.com>
wrote:
om>
Find a place for second antenna. If there isn't room on belly, consider
locations on top of fuselage, or.. I've had success locating a CI-122 on
an inspection plate on underside of a wing. I'm not aware of any
reasonable device that allow sharing a transmitting antenna with
adequate protection from frying the receiver on the other radio.
On 6/12/2017 5:13 AM, Jeff Bertsch wrote:
> Hello.=C2- I've added a new comm radio on my RV4.=C2- I currently hav
e a
> Comant CI-122 bent whip.=C2- Space is limited on the belly of the RV4.
>=C2- Would it be OK to use a multiplexer and share the antenna or try to
> find a spot for another antenna?=C2- What multiplexer would you recomme
nd?
>
> Thanks.
>
> Jeff Bertsch
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=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
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