Today's Message Index:
----------------------
1. 01:52 AM - Re: battery tender jr (GLEN MATEJCEK)
2. 02:24 AM - Re: Rocker switches (Carlos Trigo)
3. 03:50 AM - Re: Icom A200 transceiver ()
4. 08:19 AM - Re: Icom A200 transceiver (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: battery tender jr |
No problemo- no hurries here. I've yet to replace my batteries, either.
Just curious-
Message 2
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| Subject: | RE: Rocker switches |
Thanks Ron
I already had sent an email to AE, because this is probably the way to go.
Regards
Carlos
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ronald
Cox
Sent: sbado, 30 de Novembro de 2013 15:55
Subject: AeroElectric-List: Re: AeroElectric-List Digest: 8 Msgs - 11/29/13
--> <flyboyron@gmail.com>
Carlos,
Check these guys out. This page shows where to buy the switches and they'll
engrave them for you.
http://www.engravers.net/aircraft/rocker_switches.htm
Lots of folks in the Glasair crowd have used them.
Ron Cox
Glasair Super II F/T
> Time: 09:26:32 AM PST US
> From: "Carlos Trigo" <trigo@mail.telepac.pt>
> Subject: AeroElectric-List: Switches
>
> Gents
>
>
> I am using toggle switches for non-lights (e.g. Fuel pump, Pitot heat,
> Aux Battery, etc.) and both for aesthetical reasons and non-confusing
> reasons, I am planning to use rocker illuminated switches for the
> Lights (Landing Light, Taxi Light, Strobes, Beacon, NAV Lights, Cabin
Light).
>
>
> I am not finding a source for good rocker switches, like for example
> the ones from Klixon or other good brand. Neither ACS or Stein Air
> seems to carry those.
>
>
> Can someone please point me to a source for good rocker illuminated
> switches?
>
>
> Regards
>
> Carlos
>
>
>
Message 3
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| Subject: | Icom A200 transceiver |
Hello Guido,
It would be helpful for you to speak to the technicians who look after the
ground radio systems at Locarno to find out whether there are 2 separate
transmitters operating on 134.825, but at slightly different frequencies
(known as offset carrier working). This can be adopted to avoid 2 identical
signals interfering with each other - they are both within the pass band of
the receiver and so should reinforce each other, but it is possible that
they could generate a beat frequency that interferes with the
signal-to-noise squelch circuit.
I have no explanation to suggest why the ground receivers should be able to
accept other people's transmissions and not those from your ICOM. However,
the more you know about the technical setup on the ground that connects to
the 2 separate antennas, the better placed you will be to discuss with ICOM
what might be causing your problem.
Good luck!
Mike
Dr Mike Gregory
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Guido von
Allmen
Sent: 30 November 2013 09:21
Subject: AeroElectric-List: Icom A200 transceiver
My name is Guido and I am new to this List. I have some trouble with my Icom
A200 which is in my newly built Wittman Tailwind W10. Maybe this topic has
already been discussed and if so can you tell where I can find this issue .
Here in Locarno Switzerland ( LSZL) my local airport the tower transmits
with 2 antennas at the same frequency 134.825 ( one directly on the tower
and the other about 7 miles north in the direction of the runway 26 ) They
told me this is due to the mountains all around the airport. Only at a
certain point flying between the two antennas ( for instance on long final )
I cannot hear the tower instructions and the tower hears me only when they
shut down one antenna. There is absolutely no problem with all the other
airtraffic on ground and in the air. All the other
airplanes don't have this problem as we were told. I already changed the
antenna, its position on the plane from the bottom to the top and the
antenna cable with a double shielded one but with no result.
Can anyone of the Forum give me some advice how to solve this problem.
I contacted Icom America where I bought the transceiver but they too
couldn't get me an answer.
Thanks in advance and have a nice weekend.
Guido
Message 4
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| Subject: | Icom A200 transceiver |
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Guido von Allmen
Sent: 30 November 2013 09:21
Subject: AeroElectric-List: Icom A200 transceiver
My name is Guido and I am new to this List. I have some trouble with
my Icom A200 which is in my newly built Wittman Tailwind W10. Maybe
this topic has already been discussed and if so can you tell where I
can find this issue .
Here in Locarno Switzerland ( LSZL) my local airport the tower
transmits with 2 antennas at the same frequency 134.825 ( one
directly on the tower and the other about 7 miles north in the
direction of the runway 26 ) They told me this is due to the
mountains all around the airport. Only at a certain point flying
between the two antennas ( for instance on long final ) I cannot hear
the tower instructions and the tower hears me only when they shut
down one antenna. There is absolutely no problem with all the other
airtraffic on ground and in the air. All the other
airplanes don't have this problem as we were told. I already changed
the antenna, its position on the plane from the bottom to the top and
the antenna cable with a double shielded one but with no result.
Can anyone of the Forum give me some advice how to solve this problem.
I contacted Icom America where I bought the transceiver but they too
couldn't get me an answer.
Thanks in advance and have a nice weekend.
Guido
I would not expect ICOM to be helpful . . . nor would
it be helpful for you to 'do things' to your installation
on the airplane.
There are two ways that two antennas can work in close
proximity on the same frequency to transmit . . .
(1) you have two separate facilities, probably tied
together by land line. In this instance, the operator
of the ground based facilities chooses facility A
or B to talk to any given airplane. This is done with
a selector switch of some type . . . a switch that
usually prevents simultaneous operation of both
facilities. This is, I suspect, what has been installed
at your local airport. BOTH receivers can be active
at all times but when one receiver gets a strong signal
from an airplane, there's an indicator lamp that tells
the operator which receiver took the call and he/she
is expected to select the appropriate transmitter on
which to reply, But in no case would you want the both
transmitters to operate simultaneously.
(2) two antennas are treated as an array for generating
emissions from one source or two phase-locked sources.
This is fraught with potential for compromised transmissions
as the receiving station (airplane) moves through the
standing waves set up by troughs and peaks of alternately
opposing and aiding signals from the two antennas . . .
heard in the airplane as 'flutter' on the received
signal.
If you are experiencing a null zone between the two
antennas but do not hear flutter or a beat note
between the two transmitted signals . . . then it's
probable that system (1) is installed and you have
a severe sensitivity issue with your installation.
I suspect an open coax.
Check SWR on your airplane's comm antenna from
the transceiver end of the feedline. How's your
radio's performance for communicating with other
facilities that do not have remotely located
transceivers on a shared frequency? From 1000
feet up, you should be able to talk with a
ground station that is 25 miles away (assuming
no intervening mountains) or other airplanes
from 50 to 100 miles away.
Bob . . .
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