Today's Message Index:
----------------------
1. 05:59 AM - Re: Fixture for wiring a 25 pin D-Sub connector (Eric M. Jones)
2. 06:14 AM - Re: Hello everyone. I'm having a terrible time (echristley@nc.rr.com.getting.the.radio.to.work.properly)
3. 06:58 AM - Re: Load Dump redux (Robert L. Nuckolls, III)
4. 07:35 AM - Re: Hello everyone. I'm having a terrible time (erie)
5. 08:03 AM - For and aft slide switch (Mark Banus)
6. 08:35 AM - Re: For and aft slide switch (Bruce Gray)
7. 09:42 AM - Strobe supply question (Charlie Kuss)
8. 09:46 AM - non-adhesive stretchy tape (Joa Harrison)
9. 10:00 AM - Re: For and aft slide switch (Jaye and Scott Jackson)
10. 10:10 AM - Re: non-adhesive stretchy tape (Dan Checkoway)
11. 10:18 AM - Re: non-adhesive stretchy tape (f1rocket@comcast.net)
12. 10:48 AM - Re: non-adhesive stretchy tape (Joel Jacobs)
13. 10:58 AM - Re: non-adhesive stretchy tape (Joa Harrison)
14. 01:10 PM - Re: non-adhesive stretchy tape (Paul)
15. 02:38 PM - Re: non-adhesive stretchy tape (Larry McFarland)
16. 02:43 PM - Re: non-adhesive stretchy tape (John Schroeder)
17. 02:58 PM - Noise filter (Mark Sherman)
18. 04:04 PM - Re: Noise filter (Matt Prather)
19. 05:46 PM - Re: non-adhesive stretchy tape (Ken)
20. 08:37 PM - Question about Switches (Dennis Johnson)
Message 1
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| Subject: | Re: Fixture for wiring a 25 pin D-Sub connector |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: jerb <ulflyer@verizon.net>
>--> AeroElectric-List message posted by: Neil Clayton
<harvey4@earthlink.net>
>
>Bob....I spent two frustrating hours trying to solder a D-sub connector
>onto the 19+ wires of an Infinity Stick. The idea is to be able to remove
>the stick during annuals, etc. I eventually threw up the idea and decided
>there MUST be some kind of professional jig for wiring these things.
>Can you direct me to such a device?
>
>Many thanks
>Neil
Removal of the control part of the stick is common practice in jets. I have
seen those round Amphenol circular bayonet-lock connectors.
My opinion is to find a real professional electronics assembler (usually
older women ) to do the job for you. Don't believe that you can easily
develop the skill to do this correctly yourself.
By the way:
Jig---a device, often temporary, to guide a tool or tool bit.
Fixture---a device to hold a part that is being worked on.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
"A man's got to know his limitations."
(Clint Eastwood's Dirty Harry in Magnum Force, 1973)
Message 2
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| Subject: | Re: Hello everyone. I'm having a terrible time |
getting the radio to work properly
--> AeroElectric-List message posted by: echristley@nc.rr.com getting the radio
to work properly
> I too have an Icom handheld on the dash. I take
the 12 volt wire
> thatfeeds the radio to a 2,200uf capacitor to
ground then through
> an iron core
> choke then another 2,200uf to ground, this then
Isn't this an oscillator? I'm not sure of the
relationship between iron core chokes and inductors,
but wouldn't an oscillator be 'bad' at this point in
the circuit?
Message 3
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| Subject: | Re: Load Dump redux |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>Comments/Questions: Hello Bob,
>
>I'm considering the electrical system in my RV-6 project.
>
>I work on computers, so mobile 12V is a little foreign, and I'm not
>looking to beat a dead horse, but...
>
>When I went looking for load dump information as it applies to airplanes I
>found your link on voltage spikes.
>
>My understanding is that if a battery circuit opens the energy stored in
>the leakage inductance of the stator windings of the alternator is what
>might cause a voltage spike.
>
>As you point out, the stator windings are not tightly coupled to the
>field, this limits the short circuit output current.
>
>This lose coupling also prevents an infinitely fast voltage regulator on
>the field windings from controlling the voltage on the alternator output
>terminal if the battery is quickly disconnected.
>
>Am I wrong?
Only slightly. The excess voltage is not a problem of energy
stored on alternator inductance. It's a matter of alternator/regulator
dynamics. Suppose you're playing tug-of-war and one side suddenly
releases their grip. It's nearly impossible for folks on the other side to
avoid falling. Even if they're braced for the event, their reaction to
sudden release of tension is subject to reaction time and their
position is certain to transit backwards for a period of time required
to react to the reduced stress.
Alternators (indeed all servo systems) exhibit the same response to
one degree or another unless they are over-damped. Over-damping the
servo response is generally not acceptable in most control situations.
The event is rare in aircraft and only came to light again a few months
ago when Van's Aircraft noted that some builders were killing their
alternators
when wired for external OV protection and they happened to operate the
alternator's ON/OFF control switch at a time when the alternator was
producing significant power. Alternators with built in regulators need
a b-lead disconnect contactor for absolute over the consequences of
a failed regulator. Opening this contactor when the alternator was
producing significant power caused the alternator to overshoot and kill
its own regulator.
There are efforts under way to quantify the magnitude of this voltage
perturbation and size a transient clamping device that will mitigate
the event. In any case, this an isolated event that happens only
when the alternator is operated in a mode inconsistent the normal
operation of the aircraft. By the way, the production Bonanza has
separate alternator and battery switches. I could sit in the seat of
a brand new airplane and produce an alternator overshoot event with
a particular manipulation of the controls. For the event cited on
Van's alternators, only the alternator is at-risk. Except for
inadvertent but stressful mis-operation of controls that MIGHT
kill the alternator, the system still does the task for which it
was designed - protect the ship's system from ov events.
Bob . . .
>Ole Moyer
>Power Supply Application Engineer
>On Semiconductor
On of my favorite silicon foundries. You guys make some
nifty parts!
Bob . . .
-----------------------------------------
( Experience and common sense cannot be )
( replaced with policy and procedures. )
( R. L. Nuckolls III )
-----------------------------------------
Message 4
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| Subject: | Re: Hello everyone. I'm having a terrible time |
getting the radio to work properly
--> AeroElectric-List message posted by: erie <erie@shelbyvilledesign.com>
Actually, If I'm not mistaken it's a pi filter, quite good at
attenuating noise out ...
erie
Message 5
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| Subject: | For and aft slide switch |
--> AeroElectric-List message posted by: "Mark Banus" <mbanus@hotmail.com>
I'm working on the design for my throttle. I want to put an on-off-on spring loaded
to off slide switch in the end of the handle. Military jets have this type
of switch in the throttle for speed brakes. Anyone know what they are called
and where does one get them. Thanks
Mark Banus
Glasair SII FT
Message 6
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| Subject: | For and aft slide switch |
--> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org>
Try, http://www.ottoeng.com/index.html
Bruce
www.glasair.org
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
Banus
Subject: AeroElectric-List: For and aft slide switch
--> AeroElectric-List message posted by: "Mark Banus"
<mbanus@hotmail.com>
I'm working on the design for my throttle. I want to put an on-off-on
spring loaded to off slide switch in the end of the handle. Military
jets have this type of switch in the throttle for speed brakes. Anyone
know what they are called and where does one get them. Thanks
Mark Banus
Glasair SII FT
==
==
==
==
Message 7
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| Subject: | Strobe supply question |
--> AeroElectric-List message posted by: Charlie Kuss <chaztuna@adelphia.net>
Bob & Listers,
Is there any "minimum" distance that one should keep between a strobe
power supply and your intercom wiring? Is this a potential issue? All
intercom and strobe wiring will be shielded.
Charlie Kuss
Message 8
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| Subject: | non-adhesive stretchy tape |
--> AeroElectric-List message posted by: Joa Harrison <flyasuperseven@yahoo.com>
Anybody know the name and maybe a place to buy the stretchy tape that sticks to
itself (really well) without adhesive? They had it on demo at Oshkosh and it
was pretty impressive. Anybody use it for large wire bundles?
Joa
---------------------------------
Message 9
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| Subject: | Re: For and aft slide switch |
--> AeroElectric-List message posted by: "Jaye and Scott Jackson" <jayeandscott@telus.net>
My 6 has a surplus throttle grip from a F-86, and I've used the speedbrake
slide switch for the electric flaps.
When I opened up the grip to find out which wires were which, I was
surprized to find the speedbrake switch was actually just a toggle, with the
top of the handle allen-keyed to the plastic thumb slide.
That would explain why the speedbrake part of the grip is a little arc
between two side ears.
Scott in Vancouver
----- Original Message -----
From: "Bruce Gray" <Bruce@glasair.org>
Subject: RE: AeroElectric-List: For and aft slide switch
> --> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org>
>
> Try, http://www.ottoeng.com/index.html
>
> Bruce
> www.glasair.org
>
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
> Banus
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: For and aft slide switch
>
>
> --> AeroElectric-List message posted by: "Mark Banus"
> <mbanus@hotmail.com>
>
> I'm working on the design for my throttle. I want to put an on-off-on
> spring loaded to off slide switch in the end of the handle. Military
> jets have this type of switch in the throttle for speed brakes. Anyone
> know what they are called and where does one get them. Thanks
>
> Mark Banus
>
> Glasair SII FT
>
>
> ==
> ==
> ==
> ==
>
>
Message 10
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: "Dan Checkoway" <dan@rvproject.com>
Uni-wrap silicone tape.
http://www.aircraftspruce.com/catalog/appages/uniwrap.php
You get better value in the roll from Spruce than you do from B&C.
)_( Dan
RV-7 N714D
http://www.rvproject.com
----- Original Message -----
From: "Joa Harrison" <flyasuperseven@yahoo.com>
Subject: AeroElectric-List: non-adhesive stretchy tape
> --> AeroElectric-List message posted by: Joa Harrison
<flyasuperseven@yahoo.com>
>
>
> Anybody know the name and maybe a place to buy the stretchy tape that
sticks to itself (really well) without adhesive? They had it on demo at
Oshkosh and it was pretty impressive. Anybody use it for large wire
bundles?
>
>
> Joa
>
>
> ---------------------------------
>
>
Message 11
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: f1rocket@comcast.net
I found it at Radio Shack. I don't remember the exact name, but it is rubberized
silicon tape. It only sticks to itself. I use it to wrap wire bundles where
they touch other bundles. I think Bob's shop notes also refer to this and
picture it in the article about tying wire bundles.
Randy
F1 Rocket
http://f1rocket.home.comcast.net/
-------------- Original message --------------
> --> AeroElectric-List message posted by: Joa Harrison
>
>
> Anybody know the name and maybe a place to buy the stretchy tape that sticks
to
> itself (really well) without adhesive? They had it on demo at Oshkosh and it
> was pretty impressive. Anybody use it for large wire bundles?
>
>
> Joa
>
>
>
> ---------------------------------
>
>
>
>
>
>
I found it at Radio Shack. I don't remember the exact name, but it is rubberized
silicon tape. It only sticks to itself. I use it to wrap wire bundles where
they touch other bundles. I think Bob's shop notes also refer to this and picture
it in the article about tying wire bundles.
Randy
F1 Rocket
http://f1rocket.home.comcast.net/
-------------- Original message --------------
-- AeroElectric-List message posted by: Joa Harrison <FLYASUPERSEVEN@YAHOO.COM>
Anybody know the name and maybe a place to buy the stretchy tape that sticks to
itself (really well) without adhesive? They had it on demo at Oshkosh and it
was pretty impressive. Anybody use it for large wire bundles?
Joa
---------------------------------
==================================================
&
Message 12
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: "Joel Jacobs" <jj@sdf.lonestar.org>
Sounds like you're describing Scotch 130C linerless electrical tape. You
can get it at http://www.mcmaster.com/
Joel
----- Original Message -----
From: "Joa Harrison" <flyasuperseven@yahoo.com>
Subject: AeroElectric-List: non-adhesive stretchy tape
> --> AeroElectric-List message posted by: Joa Harrison
<flyasuperseven@yahoo.com>
>
>
> Anybody know the name and maybe a place to buy the stretchy tape that
sticks to itself (really well) without adhesive? They had it on demo at
Oshkosh and it was pretty impressive. Anybody use it for large wire
bundles?
>
>
> Joa
>
>
> ---------------------------------
>
>
Message 13
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: Joa Harrison <flyasuperseven@yahoo.com>
Great replies, thanks everyone. A buddy here at work went to New Zealand recently
and said that this kind of tape was at all the convenience stores and such
for a really low price. Guess it just hasn't caught on that fast out here for
household use.
Thanks again folks!
Joa
---------------------------------
Message 14
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: Paul <pwilson@climber.org>
Home Depot has the tape, as do most electrical supply places. Its very popular
with electricians for house wiring.
Paul
=======
At 10:57 AM -0700 8/12/04, Joa Harrison wrote:
>--> AeroElectric-List message posted by: Joa Harrison <flyasuperseven@yahoo.com>
>
>Great replies, thanks everyone. A buddy here at work went to New Zealand recently
and said that this kind of tape was at all the convenience stores and such
for a really low price. Guess it just hasn't caught on that fast out here for
household use.
>
>Thanks again folks!
--
Message 15
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: "Larry McFarland" <larrymc@qconline.com>
The stuff you refer to is called self-fusing tape. It's kind of rubbery,
but does stretch
and stick to itself extremely well. Radio Shack is where I've been getting
it.
Good for overwrapping electrical quick disconnects.
Larry
> Anybody know the name and maybe a place to buy the stretchy tape that
sticks to itself (really well) without adhesive? They had it on demo at
Oshkosh and it was pretty impressive. Anybody use it for large wire
bundles?
>
>
> Joa
Message 16
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| Subject: | Re: non-adhesive stretchy tape |
--> AeroElectric-List message posted by: "John Schroeder" <jschroeder@perigee.net>
Any electrical supply house will have this. I believe it is
silicone-based. We used it to wrap the connections to the runway & taxiway
lights here at the airpark before stuffing the wires into the big cans.
Had one error and traced it to the malfunction. Getting that stuff off is
difficult. You literally have to cut it off. It is "self vulcanizing" and
I believe it. It is legal - code wise for waterproofing a connection. The
guys used it on my well pump and that is 150 feet into the water.
Cheers,
John
> Anybody know the name and maybe a place to buy the stretchy tape that
> sticks to itself (really well) without adhesive?
Message 17
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|
--> AeroElectric-List message posted by: Mark Sherman <msherman95632@yahoo.com>
Good afternoon all.
I am having a problem with strobe noise in the
headsets. I have searched the archives and tried all
the fixes. Everything wired per AeroElectric
Connection.
I have decided to install a choke filter, but the one
described in Bob's notes will only handle 2.0
continuous amps. I need at least 8 amps for the
ValCom 760 I'm using.
Can anyone recommend the size, part numbers and
supplier for parts to handle the 8 amps?
=====
Mark S.
CH-701/912ULS
N752MS reserved
__________________________________
http://promotions.yahoo.com/new_mail
Message 18
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| Subject: | Re: Noise filter |
--> AeroElectric-List message posted by: "Matt Prather" <mprather@spro.net>
Does the ValCom 760 use vacuum tubes?? 8A is more than 96watts,
48 radiated - enough to talk all over the planet on, or since its VHF, to the
moon (with the right antenna) anyway.
You could guess that a modern transmitter was 50% efficient. If the radiated
power were 6 watts (makes the math easy), then it would be burning 12 watts
on the input. 12watts is about 1amp.... 2amps should handle up to 12 watts
continuous radiated.
I'll bet that the 8A spec was a WAG on the part of the ValCom engineers, and
the 2A continuous should be plenty.
Regards,
Matt-
VE N34RD, C150 N714BK
> --> AeroElectric-List message posted by: Mark Sherman
> <msherman95632@yahoo.com>
>
> Good afternoon all.
>
> I am having a problem with strobe noise in the
> headsets. I have searched the archives and tried all
> the fixes. Everything wired per AeroElectric
> Connection.
>
> I have decided to install a choke filter, but the one
> described in Bob's notes will only handle 2.0
> continuous amps. I need at least 8 amps for the
> ValCom 760 I'm using.
>
> Can anyone recommend the size, part numbers and
> supplier for parts to handle the 8 amps?
>
> =====
> Mark S.
> CH-701/912ULS
> N752MS reserved
>
>
> __________________________________
> http://promotions.yahoo.com/new_mail
>
>
Message 19
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| Subject: | Re: non-adhesive stretchy tape |
on juliet
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Actually the more common cheaper black stuff like Scotch 130 is some
type of rubber not silicone if it matters to your application. The
silicone stuff like Scotch 70 is I believe usually not black and
substantially more expensive.
Ken
John Schroeder wrote:
>--> AeroElectric-List message posted by: "John Schroeder" <jschroeder@perigee.net>
>
>Any electrical supply house will have this. I believe it is
>silicone-based. We used it to wrap the connections to the runway & taxiway
>lights here at the airpark before stuffing the wires into the big cans.
>Had one error and traced it to the malfunction. Getting that stuff off is
>difficult. You literally have to cut it off. It is "self vulcanizing" and
>I believe it. It is legal - code wise for waterproofing a connection. The
>guys used it on my well pump and that is 150 feet into the water.
>
>Cheers,
>
>John
>
>
>
>>Anybody know the name and maybe a place to buy the stretchy tape that
>>sticks to itself (really well) without adhesive?
>>
>>
Message 20
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| Subject: | Question about Switches |
--> AeroElectric-List message posted by: "Dennis Johnson" <pinetownd@volcano.net>
Hi Bob,
In a recent reply about switches, you said:
My personal preference would be a 4 pole, progressive transfer,
three position toggle which can be wired to provide double-pole,
three position operation as described in Figure 11-16 of the
'Connection (except you have two poles of circuit instead of
one). A good switch for this task is a ITT-Cannon/CK 7411SYZQE
which you can also find in Digikey's catalog at:
http://dkc3.digikey.com/PDF/T042/1005.pdf
My question is how could you tell just by looking at the info in the catalog that
it is a progressive transfer switch? Are all 4 pole, three position, switches
progressive transfer? Unless a switch comes with your standardized numbering
system, I'm lost.
Thanks again for helping me resolve my alternative magneto switch scheme questions.
Best,
Dennis Johnson
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