Today's Message Index:
----------------------
1. 05:22 AM - Inexpensive HID light data point (Brantel)
2. 07:12 AM - Re: AOA (Robert L. Nuckolls, III)
3. 07:36 AM - Re: Inexpensive HID light data point (Bill Watson)
4. 07:46 AM - HID Light marketing (Roger)
5. 08:21 AM - Re: HID Light marketing (Brantel)
6. 09:10 AM - Re: HID Light marketing (JOHN TIPTON)
7. 09:12 AM - Re: Power for Checking Systems Out on the Ground (Robert L. Nuckolls, III)
8. 12:14 PM - Re: Power for Checking Systems Out on the Ground (Robert L. Nuckolls, III)
9. 12:15 PM - Re: No click when pushing PTT (Robert L. Nuckolls, III)
10. 12:25 PM - Re: Speaking of Wig Wags (Brantel)
11. 02:53 PM - Permanent Magnet Alternators - Over Voltage Protection (markcs)
12. 03:46 PM - Re: Re: HID Light marketing (Jared Yates)
13. 03:51 PM - Re: Power for Checking Systems Out on the Ground (Don Hudgeon)
14. 04:26 PM - Re: HID Light marketing (Brantel)
15. 05:05 PM - Re: No click when pushing PTT (N777TY)
16. 05:17 PM - Re: Re: No click when pushing PTT (Robert L. Nuckolls, III)
17. 05:29 PM - Re: Power for Checking Systems Out on the Ground (Robert L. Nuckolls, III)
18. 05:32 PM - Re: Permanent Magnet Alternators - Over Voltage Protection (Robert L. Nuckolls, III)
19. 05:41 PM - Re: Re: No click when pushing PTT (Bob McCallum)
20. 07:04 PM - Re: No click when pushing PTT (N777TY)
21. 07:39 PM - Re: Re: No click when pushing PTT (Charlie England)
22. 09:08 PM - Vx Aviation expands it's EFIS Wiring Hub Product Line (Vern Little)
23. 10:09 PM - Re: 2nd radio (James Robinson)
24. 10:30 PM - Re: Re: 2nd radio (Etienne Phillips)
Message 1
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Subject: | Inexpensive HID light data point |
I bought a pair of 35W HID lights from Ebay to replace the bulbs in my 55w Duckworks
kit that was a set of fog lights converted to use with their brackets. I
got the 6000K H3 bulbs because I wanted white white light. The 55w halogens always
looked very warm in color. The HID kit was advertised as a "Digital" ballast
kit. After looking at a million sites selling these things it seems that
almost all of them are clones of one another and or made by the same shop in China.
The kit I bought was ~$37 delivered for the pair. I did open the ballast
after I received them and they do appear to be mostly electronic but there was
a small transformer in there. The inside was sprayed/potted with a rubber coating
so it was hard to tell what was really in there.
Anyway....I mounted the ballast to the back of the Duckworks bracket using the
mounting bracket that came with the kit. I did modify the bracket somewhat to
cut off extra that was not needed. The wiring was simple as pie.
After mounting everything and turning them on, I can honestly say that these things
are at least three times brighter than the 55w halogens. Here is a comparison,
the left side is the HID, the right is the 55w halogen:
Here they are straight on with the beam:
Same shot with the old 55w:
I had to leave the airport before it got dark so I did not get any other pics.
One thing...I tried to wig-wag these after they warmed up but that was a no go!!!
They will not wig-wag with the NAPA flasher relay!!! Maybe they would with
one of the solid state wig-waggers but they won't with the NAPA relay. It just
buzzed and sounded like it was going to fry itself so I stopped trying after
a second or two.
I have always been afraid to try and regain my night currency (never had it in
a TW airplane) with those dim 55w halogens. Maybe now I can give it a whirl.
Just ordered one of these http://www.soundoffsignal.com/warnamber/flashers/Headlight/ETHFSS-SP.htm . Since it is totally solid state, maybe it will work. It also has a few different flash speeds to pick from.
Here is an iPhone Video of my new inexpensive HID's wig-wagging with the new flashed
I installed. Works better than great!!!
http://www.youtube.com/watch?v=vY7UcK6XD2s
To finish the story on my inexpensive HID lights, after flying with them for some
time I did notice that they reflected a ton of high frequency noise back onto
the power lines. This is clearly evident when listening to the background noise
on any non-active com channel with the squelch in test mode or open.
This noise also caused my Dynon's DSAB bus to drop out...really bad in Wig-Wag
mode...
The HIDs initially give a pretty good "bezerp" when they ignite and then they settle
into just plain old static. The noise threshold is obvioulsy increased quite
a bit.
The Wig-Wag mode only exacerbates this issue. If they are warm, the Wig-Wag does
not bezerp each time they come on, they ignite instantly with no "bezerp" but
the noise floor is still elevated.
Those that know a little about radio will understand that just because you can
squelch out background noise, it is not desirable to just mask the issue since
an increased or high noise threshold can cause your AGC circuit in the radio
to automatically reduce the sensitivity of the receiver resulting in poor performance.
That being said, Here was the fix:
I installed a Ferrite Core as close to the HID ballast as possible. I wrapped the
power and ground wires thru the core three times each. Ferrite cores act as
a choke to high frequencies basically blocking them at the source before they
can do any harm.
I also installed a .1uF capacitor across the power and ground wires right behind
the ferrite core. This capacitor functions as a decoupling capacitor and will
shunt any high frequencies that get past the ferrite core to ground before they
can travel back up the power wire.
The ferrite core I used is similar to this one:
The results are complete elimination of the noise reflected back onto the aircraft's
systems. No noticable noise floor increase, no Dynon DSAB dropouts!!! Could
not even tell I had switched them on and the Wig-Wag only results in some
very slight clicks over the intercom.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331009#331009
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At 08:03 PM 2/13/2011, you wrote:
>My comment on icing and AOA systems ~~If you encounter any type
>of icing turn the AOA OFF unless you have full de-icing vane &
>aircraft. We haven't even done R&D on a heated vane because of
>liability. Even Boeing can't give you hard numbers with icing on
>wings. Heated vane and icing on wings is NOT a good deal!
>Elbie Mendenhall, EM Aviation,
>LLC <http://www.riteangle.com>www.riteangle.com
Exactly. The fleet of bizjets at HBC were all
qualified for flight into known ice. Everything
was heated or hammered.
I'll have to call some of my jet-jockey friends
at HBC and inquire as to words in the POH concerning
usefulness and cautions about AOA displays
on the production fleet.
I worked a REALLY strange problem on the Beechjet
some years back were pilots experienced loss of
IAS on BOTH sides of the airplane. Displays always
recovered at lower, warmer altitudes.
This often occurred in relatively clear air.
There was a LOT of brainstorming by a LOT
of grey beards as to the physics behind this
rare but disturbing event.
My task involved cutting a pitot tube open,
peppering it with thermocouples and putting
it back together again so that we could study
not only temperatures at the surfaces to be
de-iced but internally. There was some question
of ice crystals bouncing through the labyrinth
of pressure channels only to melt and re-freeze
inside the pitot tube.
During the fire drill for sniffing out root cause,
somebody asked the question: "How does the existence
of a working AOA display help the pilot who is
temporarily deprived of IAS?" Good question.
The Beechjet had been fitted with AOA indication
since its birth as the Mitusbishi Diamondjet.
But nobody had ever researched and written the
approve procedure for using AOA as an aid to
maneuvering without IAS.
That amendment was quickly added to the POH.
I'm not sure we ever deduced how pitot pressure
was being obstructed. I'll have to ask how that
problem resolved too. But it was interesting
that a perfectly useful display had existed
for so long but was never fully developed as a
component of plan-b, plan-c, etc. Shucks, with
DUAL air data systems, what are the odds?
Bob . . .
Message 3
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Subject: | Re: Inexpensive HID light data point |
Thanks for the detail write-up. I bought and installed by Duckworks
lights over 2 years ago and just getting ready to fly with them. I've
already killed a deer on our grass strip so I'm really looking forward
to lighting the place up compared to the single incandescent bulb on the
Maule.
Night TW - If you can, treat yourself to some night landings on grass.
Slightly uphill if possible. So Sweet!
do not archive
Bill "waiting for painting temps this weekend, at last" Watson
On 2/14/2011 8:17 AM, Brantel wrote:
> --> AeroElectric-List message posted by: "Brantel"<bchesteen@hughes.net>
>
> I bought a pair of 35W HID lights from Ebay to replace the bulbs in my 55w Duckworks
kit that was a set of fog lights converted to use with their brackets.
I got the 6000K H3 bulbs because I wanted white white light.
> After mounting everything and turning them on, I can honestly say that these
things are at least three times brighter than the 55w halogens.
Message 4
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Subject: | HID Light marketing |
There seems to be a lot of marketing ploys etc. for the HID lights. I have
a couple of questions to help clearify the hype. Some of the descriptions
say HID type lights with halogen bulbs, and some are HID devices with xenon
bulbs.
1. Does a true HID light use only a xenon lamp?
2. Is a so called HID type Halogen a real HID light, with the same
brightness as a xenon?
3. Does anyone have a temperature/color spectrum chart for HID lights?
example: 6000K, 10000k
4. Does anyone have a chart/description for Lamp configurations? Example:
H3
Roger
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Subject: | Re: HID Light marketing |
HID Lights use an Arc Tube bulb. No filament like a Halogen
HID Type Halogens are not HID
I used the 6000K H3 bulbs. 5000K-6000K is about as white as white can get!
Here you go:
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331029#331029
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Subject: | Re: HID Light marketing |
If you have a look at an e-bay listing (example here - e-bay listing #
280629659435) they give a colour chart v Ktemps
John
----- Original Message -----
From: "Roger" <mrspudandcompany@verizon.net>
Sent: Monday, February 14, 2011 3:37 PM
Subject: AeroElectric-List: HID Light marketing
> <mrspudandcompany@verizon.net>
>
> There seems to be a lot of marketing ploys etc. for the HID lights. I
> have a couple of questions to help clearify the hype. Some of the
> descriptions say HID type lights with halogen bulbs, and some are HID
> devices with xenon bulbs.
>
> 1. Does a true HID light use only a xenon lamp?
>
> 2. Is a so called HID type Halogen a real HID light, with the same
> brightness as a xenon?
>
> 3. Does anyone have a temperature/color spectrum chart for HID lights?
> example: 6000K, 10000k
>
> 4. Does anyone have a chart/description for Lamp configurations?
> Example: H3
>
> Roger
>
>
>
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Subject: | Re: Power for Checking Systems Out on the Ground |
> Can I hook the power supply up to the battery + and - terminals
> and use it as a "battery booster" (or would this toast the
> battery)? Should I just use the battery and charge it overnight
> with the BatteryMINDer? Other?
Most power supplies are NOT intended to work
in conjunction with a battery. The primary
difficulty arises when the battery is connected
to a powered down power supply. Output monitoring
and ov protection in many supplies do not like to
be "back fed" from an external power source.
My favorite technique uses a hefty switchmode
power supply similar to this:
http://tinyurl.com/4aoszlf
Combine this supply with a power diode (to
prevent back feeding) and a relay to emulate
the "field control" input on your ship's
alternator. The relay controls 120 vac going
into the power supply.
You can connect this AC mains powered "alternator"
in place of the ship's alternator. With the
alternator emulator ON, adjust the power supply
for a 14.2 volt bus.
The ship's load meter (if installed) can be
used to monitor loads on the power supply. This
will allow you to run the ship's battery in
parallel to let it pick up any transient loads
that might exceed the ratings of the power supply.
>I intend to bring up one circuit at a time and I want to measure
>each circuit's actual power consumption and I'll need to be careful
>not to overload the power supply.
If it's a switchmode supply, it will have built
in overload protection. Further, the supply I
linked above has a thermostatically controlled
fan built in that turns on when the supply is
being taxed to rated output.
Bob . . .
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Subject: | Re: Power for Checking Systems Out on the Ground |
>I have a BatteryMINDer charger/maintainer and a Radio Shack power
>supply whose output is rated at 13.8 VDC at 15 Amps.
>
>Should I just disconnect the main battery and use the power supply
>in its place? Can I hook the power supply up to the battery + and -
>terminals and use it as a "battery booster" (or would this toast the battery)?
Forgot to touch on this. Your existing supply output
voltage is not high enough to hook directly across a
battery and still have the recommended isolation
(back feed prevention) diode. So you can use the
power supply to emulate a battery. Disconnect
the battery and put the power supply in its place.
Bob . . .
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Subject: | Re: No click when pushing PTT |
At 10:32 PM 2/13/2011, you wrote:
>
>Just trying to start the troubleshooting of a strange issue I have
>in my plane. When I push PTT button while COM2 is selected, I don't
>get that click at the beginning of transmission... The radio
>transmits just fine.. just doesn't give that click. COM1 works
>fine. Both are using same PTT button and are wired into the PSE
>8000 audio panel. (COM1 is Garmin 530W and COM2 is Garmin 430W)
>
>Since the radio works fine it's a somewhat lower priority issue, but
>it does cause a problem when flying at night... I cannot turn on the
>runway lights with the second radio because the click isn't there...
>
>Tried swapping antenna leads but that didn't help... haven't tried
>anything else yet.. looking for some ideas.. Thanks!
Are you expecting to get an audible click from the
radio itself? I think the use of electro-mechanical
relays common to transceivers for 50 years have
been replaced with all solid state switching. If
the radio is working, it's probably performing as
advertised.
Bob . . .
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Subject: | Re: Speaking of Wig Wags |
Tom,
You can Wig-Wag HID's with the right flasher. The Napa relay won't work but this
one will:
http://www.soundoffsignal.com/warnamber/flashers/Headlight/ETHFSS-SP.htm
http://www.youtube.com/watch?v=vY7UcK6XD2s
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331052#331052
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Subject: | Permanent Magnet Alternators - Over Voltage Protection |
I live in the UK where the Rotax 912 with its 18 amp Permanent Magnet Alternator
(PMA) is ubiquitous.
Many folks are now fitting very expensive avionics in their Rotax engined aircraft
and are keen to guard against over voltage (I know how rare that is with PMA
regulators - but it does occasionally happen).
The only device that I have come across to meet this need is the excellent B&C
505-1 (I have B&C alternators on my RV - outstanding pieces of kit). I spoke
to TJ at B&C who could not have been more helpful but did explain that the 505
had not been tested an any other PMA other than their own alternators and so
he could not formally recommend it for the Rotax PMA or any other PMA for that
matter - a position which I understand.
As I understand it the 505 OV module controls the relay which takes the output
from the PMA regulator. If an OV event occurs the OV module releases the main
relay contacts and so cuts off the supply voltage to the main bus. If my understanding
is not wildly out it would appear that the 505 could be used successfully
on almost any PMA (Relay current limitations not withstanding) including
the Rotax.
I would be grateful for any experiences of members who have used the 505 on PMA's
such as the Rotax etc, or any another comments about the 505 generic suitability,
and who could confirm whether or not they agree that the 505 seems suitable
as a generic PMA OV device.
Many thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331083#331083
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Subject: | Re: HID Light marketing |
Thanks for your article in the previous message. Do you have any more
specifics about the bulbs that you are using?
On Mon, Feb 14, 2011 at 11:13 AM, Brantel <bchesteen@hughes.net> wrote:
>
> HID Lights use an Arc Tube bulb. No filament like a Halogen
>
> HID Type Halogens are not HID
>
> I used the 6000K H3 bulbs. 5000K-6000K is about as white as white can get!
>
> Here you go:
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=331029#331029
>
>
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Subject: | Re: Power for Checking Systems Out on the Ground |
This may be slightly off topic but is there anything wrong with charging my
a/c battery (modern automatic charger) without disconnecting from the
battery terminals from the a/c? I hook up the charger occasionally in order
to maintain the battery if I am not flying regularly. Also,if I am testing
electrical components such as radios or lights I have the charger hooked up
in order to more accurately simulate actual alternator operation. The a/c
engine is a Rotax 912UL. Is there something wrong with this reasoning?
Don
On Mon, Feb 14, 2011 at 12:10 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com>
>
>
> I have a BatteryMINDer charger/maintainer and a Radio Shack power supply
>> whose output is rated at 13.8 VDC at 15 Amps.
>>
>> Should I just disconnect the main battery and use the power supply in its
>> place? Can I hook the power supply up to the battery + and - terminals and
>> use it as a "battery booster" (or would this toast the battery)?
>>
>
> Forgot to touch on this. Your existing supply output
> voltage is not high enough to hook directly across a
> battery and still have the recommended isolation
> (back feed prevention) diode. So you can use the
> power supply to emulate a battery. Disconnect
> the battery and put the power supply in its place.
>
>
> Bob . . .
>
>
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Subject: | Re: HID Light marketing |
I used the 6000K H3 bulbs
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331090#331090
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Subject: | Re: No click when pushing PTT |
Yes, I'm expecting a click.. Considering that the other one which is same technology
(ie, not a case of old vs. new) I'd think the expectation is reasonable
:) Don't remember last time I ran into this situation in any plane ... so what
I'm experiencing on COM2 is not typical.. Looking for ideas what to look
at..
--------
RV-7A
N777TY
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331092#331092
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Subject: | Re: No click when pushing PTT |
At 07:02 PM 2/14/2011, you wrote:
>
>Yes, I'm expecting a click.. Considering that the other one which
>is same technology (ie, not a case of old vs. new) I'd think the
>expectation is reasonable :) Don't remember last time I ran into
>this situation in any plane ... so what I'm experiencing on COM2 is
>not typical.. Looking for ideas what to look at..
Maybe I missed something . . . is the radio
misbehaving in any other way that being
free of audible noises when you hit the
PTT button?
Bob . . .
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Subject: | Re: Power for Checking Systems Out on the Ground |
At 05:49 PM 2/14/2011, you wrote:
>This may be slightly off topic but is there anything wrong with
>charging my a/c battery (modern automatic charger) without
>disconnecting from the battery terminals from the a/c? I hook up the
>charger occasionally in order to maintain the battery if I am not
>flying regularly. Also,if I am testing electrical components such as
>radios or lights I have the charger hooked up in order to more
>accurately simulate actual alternator operation. The a/c engine is a
>Rotax 912UL. Is there something wrong with this reasoning?
No, as long as your external power source is INTENDED
to be connected across a battery (and will not be damaged
if the input power is disconnected while the battery
is still attached) then there's no reason not to leave
it connected during ground ops.
Bob . . .
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Subject: | Re: Permanent Magnet Alternators - Over Voltage Protection |
At 04:49 PM 2/14/2011, you wrote:
>
>I live in the UK where the Rotax 912 with its 18 amp Permanent
>Magnet Alternator (PMA) is ubiquitous.
>
>Many folks are now fitting very expensive avionics in their Rotax
>engined aircraft and are keen to guard against over voltage (I know
>how rare that is with PMA regulators - but it does occasionally happen).
Recommend you use the parts supplied in the BC505-1 kit
and wire per
http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z16M.pdf
Bob . . .
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Subject: | Re: No click when pushing PTT |
Bob;
I think you might have missed the part where he said that his com 2 radio
will not activate pilot controlled lighting whereas his com 1 will. He is
associating the "missing click" with the inability to activate the lighting
systems. Other than this one item it operates "normally"
Bob McC
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-
> server@matronics.com] On Behalf Of Robert L. Nuckolls, III
> Sent: Monday, February 14, 2011 8:13 PM
> To: aeroelectric-list@matronics.com
> Subject: Re: AeroElectric-List: Re: No click when pushing PTT
>
> <nuckolls.bob@aeroelectric.com>
>
> At 07:02 PM 2/14/2011, you wrote:
<microsmurfer@yahoo.com>
> >
> >Yes, I'm expecting a click.. Considering that the other one which
> >is same technology (ie, not a case of old vs. new) I'd think the
> >expectation is reasonable :) Don't remember last time I ran into
> >this situation in any plane ... so what I'm experiencing on COM2 is
> >not typical.. Looking for ideas what to look at..
>
> Maybe I missed something . . . is the radio
> misbehaving in any other way that being
> free of audible noises when you hit the
> PTT button?
>
> Bob . . .
>
>
> _-
> ====================================================
> ======
> _-
> ====================================================
> ======
> _-
> ====================================================
> ======
> _-
> ====================================================
> ======
>
>
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Subject: | Re: No click when pushing PTT |
Yes, the radio works fine otherwise (as in, it transmits fine). COM1 produces
the click (hence I can turn on the runway lights). COM2 doesn't do that. It's
not audible, and consequently lights don't come on..
I can hear the click on COM1 (and as a result, lights can be turned on, for example)..
--------
RV-7A
N777TY
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=331101#331101
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Subject: | Re: No click when pushing PTT |
On 2/14/2011 8:58 PM, N777TY wrote:
> --> AeroElectric-List message posted by: "N777TY"<microsmurfer@yahoo.com>
>
> Yes, the radio works fine otherwise (as in, it transmits fine). COM1 produces
the click (hence I can turn on the runway lights). COM2 doesn't do that. It's
not audible, and consequently lights don't come on..
>
> I can hear the click on COM1 (and as a result, lights can be turned on, for example)..
>
> --------
> RV-7A
> N777TY
I would expect the light control radio to trigger on just the carrier,
but for troubleshooting purposes you might try synthesizing a click
verbally while holding the xmit button for each trigger, & see if the
light control radio would respond to that, assuming that it really needs
to see audio on the carrier.
I'd also ask the control radio's mfgr about whether it just listens for
carrier or not.
Charlie
Message 22
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Subject: | Vx Aviation expands it's EFIS Wiring Hub Product Line |
This is a follow up to a previous announcement made on 'Lectric List. I've
been a long time follower and contributer, and I hope this is of interest to
many.
Thanks,
Vern Little
Vx Aviation www.vx-aviation.com
Summary of Announcement:
========================
Vx Aviation Enhances EFIS Wiring Hub Family
VICTORIA, BC---February 15, 2011---Vx Aviation today announced the
introduction of three new AXIS wiring hub devices for the interconnect of
Electronic Flight Information Systems (EFIS) to other avionics and
instrumentation behind the instrument panel in owner-built aircraft.
The new AXIS-9A, AXIS-25A and GBX-25A join the previously announced AXIS-15A
to provide a complete family of wiring hubs. The AXIS-9A is specific to the
Dynon SkyView Network and functions as a multi-port splitter, providing a
9-wire backplane and allowing up to five SkyView Network compatible
instruments to be connected together. The AXIS-25A is a general-purpose
25-wire backplane with five connectors that facilitate the wiring of modern
avionics panels that have a large number of RS-232, ARINC-429 and similar
data interconnects, such as would be found on IFR panels. The GBX-25A is a
ground bus wiring block that simplifies the distribution of low-current
ground or power by providing 25 bused connections.
========================
<for more information, including photographs and drawings, please see
attached document or our website>
Message 23
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I am considering a second radio. I currently have a SL30. I would like to add
a second radio, but only have 1 antenna. Can 2 radios share 1 antenna? Are
there problems with this approach? Will I have to add a audio panel?
Jim
James Robinson
Glasair lll N79R
Spanish Fork UT U77
________________________________
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Sent: Mon, February 14, 2011 9:06:47 AM
Subject: Re: AeroElectric-List: Power for Checking Systems Out on the Ground
Can I hook the power supply up to the battery + and - terminals and use it as
a "battery booster" (or would this toast the battery)? Should I just use the
battery and charge it overnight with the BatteryMINDer? Other?
Most power supplies are NOT intended to work
in conjunction with a battery. The primary
difficulty arises when the battery is connected
to a powered down power supply. Output monitoring
and ov protection in many supplies do not like to
be "back fed" from an external power source.
My favorite technique uses a hefty switchmode
power supply similar to this:
http://tinyurl.com/4aoszlf
Combine this supply with a power diode (to
prevent back feeding) and a relay to emulate
the "field control" input on your ship's
alternator. The relay controls 120 vac going
into the power supply.
You can connect this AC mains powered "alternator"
in place of the ship's alternator. With the
alternator emulator ON, adjust the power supply
for a 14.2 volt bus.
The ship's load meter (if installed) can be
used to monitor loads on the power supply. This
will allow you to run the ship's battery in
parallel to let it pick up any transient loads
that might exceed the ratings of the power supply.
I intend to bring up one circuit at a time and I want to measure each circuit's
actual power consumption and I'll need to be careful not to overload the power
supply.
If it's a switchmode supply, it will have built
in overload protection. Further, the supply I
linked above has a thermostatically controlled
fan built in that turns on when the supply is
being taxed to rated output.
Bob . . .
Message 24
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Hi Jim
If it is possible to share an aerial, do you want to? It would be a single
point of failure for both radios... Every time I've has an issue with my
radio, it's been an antenna problem (about 4 times in 12 years). Having an
independent radio is more useful to me as a backup than a convenience, and
so would require an independent aerial. But that's me!
Thanks
Etienne
On 15 February 2011 08:05, James Robinson <jbr79r@yahoo.com> wrote:
> I am considering a second radio. I currently have a SL30. I would like to
> add a second radio, but only have 1 antenna. Can 2 radios share 1 antenna?
> Are there problems with this approach? Will I have to add a audio panel?
> Jim
>
> James Robinson
> Glasair lll N79R
> Spanish Fork UT U77
>
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