Today's Message Index:
----------------------
1. 11:11 AM - Intercom Shields (PaulR)
2. 12:21 PM - ebus wire sizing (Jesse Jenks)
3. 12:34 PM - Question on best use of buttons on stick grip (DeWitt Whittington)
4. 01:04 PM - Re: Question on best use of buttons on stick grip (thomas sargent)
5. 01:10 PM - Radio Noise Answer (David & Elaine Lamphere)
6. 01:36 PM - Re: Question on best use of buttons on stick grip (Bill Mauledriver Watson)
7. 01:48 PM - Re: Question on best use of buttons on stick grip (Peter Mather)
8. 05:05 PM - Re: Intercom Shields (Robert L. Nuckolls, III)
Message 1
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Subject: | Intercom Shields |
I'm working on wiring the 25 pin Dsub for a PSE intercom and trying to understand
shields. PSE wants all the headset and mic wires shielded which I've done
and they are to only be connected together at the intercom end. My question is,
is it okay to stop these shields an inch or so before getting to the backshell
on the DB25? Will this work okay and not introduce a bunch of noise? I just
can't see anyway to continue the shielding into the backshell and then back
out to join the ground connector to run them all together. I've made a 25 pin
ground bus per Bob's directions.
Intercom is PM 3000
Thanks
--------
Paul Rose
N417PR (res)
RV-9A
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=281510#281510
Message 2
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Subject: | ebus wire sizing |
I'm trying to get to the point where I can actually run some wires so I fee
l like I'm getting something done while I continue to learn about and plan
my electrical system. I read the section in AEC on wire sizing=2C but it le
aves me feeling like I won't be able to figure this out on my own. I unders
tand that care must be taken here=2C but in real life do I need to do a who
le page of algebra for each wire? Is there a quick reference rule-of-thumb
chart somewhere?
Can someone give me a best guess on wire size for a 12' e-bus alternate fee
d wire from my rear mounted battery considering a 6 amp max load (a guess i
n itself at this point)?
While you're at it=2C how about for the battery contactor wire? Is 22awg st
ill ok for a 12' run?
Also=2C I deduced from the chart on Skytec's website that to be safe I woul
d use 1 gauge cable for the battery-starter connection=2C which appears to
be about 15'. Any thoughts on this? Obviously I would rather go a little sm
aller if possible. I plan to use welding cable.
The last question is=3B can I run these 3 wires together in the same holes(
fat battery=2C contactor=2C and e-bus)?
Thanks.
Jesse
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Message 3
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Subject: | Question on best use of buttons on stick grip |
Fellow Grand Rapids customers:
We are in the midst of trying to decide what functions to assign to
the buttons on our CS-8 Aircraft Grips from Tosten Mfg.
(<http://tostenmanufacturing.com/catalog/aircraft-grips/cs-8-aircraft-grip.html#>http://tostenmanufacturing.com/catalog/aircraft-grips/cs-8-aircraft-grip.html#).
In addition to a 4-way hat switch, this ambidextrous grip has two
face buttons, an index button and a trigger switch.
We, of course, will use the hat switch for the elevator and aileron
trim. Initially, we thought of assigning the two face buttons (L and
R) to the cowl flap (Open and Close). The trigger switch would be the
Push To Talk and the index button "Acknowledge and turn checklist
pages" for the VP-200.
However, after receiving suggestions from fellow Subie engine users,
it appears the cowl flap actuator does not deserve such a prominent
position on the grip and would work fine on the panel. There are
other possible uses for the two face buttons if we didn't assign them
to the cowl flap. For instance:
1. "Swap" button to allow the pilot to switch from the current Com to
the other Com frequency. (Suggested by PS Engineering.)
2. VFR button for GTX 327 transponder (Suggested by Garmin.)
3. Remote Servo Disconnect/Pilot Controlled Steering button for our
Trio Pro Pilot. (Strongly suggested by Trio.)
Any of you have experience of upside or downside of assigning all
these buttons?
Dee Whittington
DeWitt (Dee) Whittington
406 N Mulberry St
Richmond, VA 23220-3320
(804) 358-4333 phone and fax
SKYPE: hilltopkid
GlaStar Sportsman 2+2 #7034, reserved N18TA
Eggenfellner E6 Subaru 3.6L with 2.01 redrive
dee.whittington@gmail.com
Message 4
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Subject: | Re: Question on best use of buttons on stick grip |
I used the extra buttons for comm radio flip-flop and transponder 'ident'
button (I also have a GTX-327). Not flying yet, so I can't really tell if
these are very useful.
--
Tom Sargent, RV-6A, final assembly.
Message 5
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Subject: | Radio Noise Answer |
About a month ago I requested some ideas about what could be causing my King
KX125 nav com to have a screeching/hi-freq whistle (in the headsets) every
time I pressed the PTT button (like feed-back) - for the first 5-10min after
a startup - on cold mornings. After running for a while - even on re-fueling
stops this problem would not surface again. No-one from the group rose to
the challenge - but then again - maybe I didn't give enough data for anyone
to form an opinion or theory. :-)
At first the alternator was suspected - a call to SkyTek resulted in them
sending me a filter cap to put on the output stud of the alternator to
ground. No difference.
Then the radio's adjustment of side-tone was suspected. Decreased - no
change.
This morning I finally tracked it down - at cold temperatures (<40) the
problem will show-up. If you take the radio out, pre-heat it (I put mine in
my car with the heater going) and bring it up to 70 deg or so, put it back
in and voila! No whistle at initial startup.
This problem only showed up when the temps fell this winter.
Just thought it might help someone else who might experience the same
problem.
I guess you have to pre-heat radios as well as engines! :-)
Dave
N365DL
Message 6
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Subject: | Re: Question on best use of buttons on stick grip |
I'm not flying either (RV10) but I'm using the 2 buttons for AP
disconnect and freq flip flop.
The little button on the backside I'm using for ident. Using it for
squawking VFR would probably be equally useful since either function is
used on average slightly less than once a flight.
I really like the Tosten grip. Had some concerns about the 'fit and
finish' appearance from the website picture but turns out it is a very
nicely designed unit. The swiveling ability seems like a winner too.
Can't wait to fly it.
Bill "just finished wiring the stick last week" Watson
RV10 Durham NC
DeWitt Whittington wrote:
> Fellow Grand Rapids customers:
>
> We are in the midst of trying to decide what functions to assign to
> the buttons on our CS-8 Aircraft Grips from Tosten Mfg. (
> http://tostenmanufacturing.com/catalog/aircraft-grips/cs-8-aircraft-grip.html#
> ). In addition to a 4-way hat switch, this ambidextrous grip has two
> face buttons, an index button and a trigger switch.
>
> We, of course, will use the hat switch for the elevator and aileron
> trim. Initially, we thought of assigning the two face buttons (L and
> R) to the cowl flap (Open and Close). The trigger switch would be the
> Push To Talk and the index button "Acknowledge and turn checklist
> pages" for the VP-200.
>
> However, after receiving suggestions from fellow Subie engine users,
> it appears the cowl flap actuator does not deserve such a prominent
> position on the grip and would work fine on the panel. There are other
> possible uses for the two face buttons if we didn't assign them to the
> cowl flap. For instance:
>
> 1. "Swap" button to allow the pilot to switch from the current Com to
> the other Com frequency. (Suggested by PS Engineering.)
> 2. VFR button for GTX 327 transponder (Suggested by Garmin.)
> 3. Remote Servo Disconnect/Pilot Controlled Steering button for our
> Trio Pro Pilot. (Strongly suggested by Trio.)
>
> Any of you have experience of upside or downside of assigning all
> these buttons?
>
>
> Dee Whittington
>
> DeWitt (Dee) Whittington
> 406 N Mulberry St
> Richmond, VA 23220-3320
> (804) 358-4333 phone and fax
> SKYPE: hilltopkid
> GlaStar Sportsman 2+2 #7034, reserved N18TA
> Eggenfellner E6 Subaru 3.6L with 2.01 redrive
> dee.whittington@gmail.com
>
>
> *
>
>
> *
Message 7
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Subject: | Re: Question on best use of buttons on stick grip |
Dee
I've got the two buttons as Com frequency switch and Trio servo
disconnect - never used them !
Best regards
Peter
----- Original Message -----
From: DeWitt Whittington
To: aeroelectric-list@matronics.com
Sent: Thursday, January 14, 2010 8:33 PM
Subject: AeroElectric-List: Question on best use of buttons on stick
grip
Fellow Grand Rapids customers:
We are in the midst of trying to decide what functions to assign to
the buttons on our CS-8 Aircraft Grips from Tosten Mfg. (
http://tostenmanufacturing.com/catalog/aircraft-grips/cs-8-aircraft-grip.
html# ). In addition to a 4-way hat switch, this ambidextrous grip has
two face buttons, an index button and a trigger switch.
We, of course, will use the hat switch for the elevator and aileron
trim. Initially, we thought of assigning the two face buttons (L and R)
to the cowl flap (Open and Close). The trigger switch would be the Push
To Talk and the index button "Acknowledge and turn checklist pages" for
the VP-200.
However, after receiving suggestions from fellow Subie engine users,
it appears the cowl flap actuator does not deserve such a prominent
position on the grip and would work fine on the panel. There are other
possible uses for the two face buttons if we didn't assign them to the
cowl flap. For instance:
1. "Swap" button to allow the pilot to switch from the current Com to
the other Com frequency. (Suggested by PS Engineering.)
2. VFR button for GTX 327 transponder (Suggested by Garmin.)
3. Remote Servo Disconnect/Pilot Controlled Steering button for our
Trio Pro Pilot. (Strongly suggested by Trio.)
Any of you have experience of upside or downside of assigning all
these buttons?
Dee Whittington
DeWitt (Dee) Whittington
406 N Mulberry St
Richmond, VA 23220-3320
(804) 358-4333 phone and fax
SKYPE: hilltopkid
GlaStar Sportsman 2+2 #7034, reserved N18TA
Eggenfellner E6 Subaru 3.6L with 2.01 redrive
dee.whittington@gmail.com
Message 8
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Subject: | Re: Intercom Shields |
At 01:09 PM 1/14/2010, you wrote:
I'm working on wiring the 25 pin Dsub for a PSE intercom and trying
to understand shields. PSE wants all the headset and mic wires
shielded which I've done and they are to only be connected together
at the intercom end. My question is, is it okay to stop these
shields an inch or so before getting to the backshell on the DB25?
Will this work okay and not introduce a bunch of noise?
You can stop them 5" with virtually zero risk of noise.
I just can't see anyway to continue the shielding into the backshell
and then back out to join the ground connector to run them all
together. I've made a 25 pin ground bus per Bob's directions.
See:
http://www.aeroelectric.com/articles/pigtail/pigtail.html
Bob . . .
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