Today's Message Index:
----------------------
1. 07:40 AM - Joining 'coax' cable (JOHN TIPTON)
2. 08:37 AM - Re: Joining 'coax' cable (Jay Hyde)
3. 09:02 AM - Re: ShopGoodwill.com (Paul Millner)
4. 09:05 AM - Re: Joining 'coax' cable (Tim Andres)
5. 09:44 AM - Re: ShopGoodwill.com ()
6. 02:13 PM - Re: Re: Jabiru 3300 Over Voltage (Robert L. Nuckolls, III)
7. 02:19 PM - Re: Joining 'coax' cable (Robert L. Nuckolls, III)
8. 02:23 PM - Re: Coolie Hat Switch (Robert L. Nuckolls, III)
9. 06:42 PM - Re: Jabiru 3300 Over Voltage (Wingrider)
Message 1
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Subject: | Joining 'coax' cable |
Hi Guys (Bob)=0A-=0AI will be completing the wiring to out RV9a prior to
moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires fro
m the landing light, nav light etc to be conntected inside the fuse when th
e wings are mounted with connectors, what do I-do about about the 'coax'
for the strobe light - in an ideal world I guess one continous lead, but ca
n I join two lengths of 'coax' together, what connector do I-use, so as n
ot to compromise the integrity of the 'coax' sheathing=0A-=0ABest regards
=0A-=0AJohn
Message 2
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Subject: | Joining 'coax' cable |
The easiest is to terminate the co-ax with a normal BNC connector, say a
male one, at the point where the fuselage/ wing join is and then put a
corresponding female BNC connector on the wing side of the co-ax. If you
want to get fancy, use a chassis mounted male connection on the fuselage
side and then the wing side plugs into that and no further support is
required at that point. To be able to use BNC connectors the strobe 'co-ax'
would have to have similar dimensions to that of an antenna cable however.
If that is not the case you can use simple faston type crimp connectors.
Since the impedance of the strobe 'co-ax' is not that important (because it
is actually just a shielded cable and not a true co-axial cable in an RF
sense) you simply terminate the shield and core to insulated crimp lugs and
affect the connection using these. Just keep the 'tails' of the shield and
core short. Having the core 'outside' of the shield for a short distance
(3-6 inches) will not matter as long as there are not any other sensitive
cables running next to it right there.
Two pin AMPHENOL type, or similar MOLEX connectors will also do the job well
(see
http://za.rs-online.com/web/p/connector-accessories/2468414/?searchTerm=2468
414&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E2
66C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B367D247C5E5C647B377D247C5
E5C647B31307D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522
67573743D323436383431342677633D4E4F4E4526)
Jay
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of JOHN
TIPTON
Sent: 12 March 2012 04:35 PM
Subject: AeroElectric-List: Joining 'coax' cable
Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the wings, and
'fuse' to the hanger, while I'm Ok with the wires from the landing light,
nav light etc to be conntected inside the fuse when the wings are mounted
with connectors, what do I do about about the 'coax' for the strobe light -
in an ideal world I guess one continous lead, but can I join two lengths of
'coax' together, what connector do I use, so as not to compromise the
integrity of the 'coax' sheathing
Best regards
John
Message 3
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Subject: | Re: ShopGoodwill.com |
Seems like there'd only be a tax deduction to the extent you pay MORE
than something is worth. If you're getting goods for what they're
worth, or presumably much less, no deduction.
Of course, you can claim whatever pleases you... but that wouldn't be
sound accounting practice.
Paul
On 3/9/2012 4:21 PM, Eric M. Jones wrote:
> it's all tax deductible (I think)
--
Please note my new email address!
millner@me.com
Message 4
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Subject: | Re: Joining 'coax' cable |
Male/Female BNC connectors sealed in shrink tube.
Or get fancy and install a BNC bulkhead connector in the wing root or simila
r location.
Tim
Sent from my iPad
On Mar 12, 2012, at 7:35 AM, JOHN TIPTON <jmtipton@btopenworld.com> wrote:
> Hi Guys (Bob)
>
> I will be completing the wiring to out RV9a prior to moving the wings, and
'fuse' to the hanger, while I'm Ok with the wires from the landing light, n
av light etc to be conntected inside the fuse when the wings are mounted wit
h connectors, what do I do about about the 'coax' for the strobe light - in a
n ideal world I guess one continous lead, but can I join two lengths of 'coa
x' together, what connector do I use, so as not to compromise the integrity o
f the 'coax' sheathing
>
> Best regards
>
> John
>
>
==========================
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==========================
=========
==========================
=========
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=========
>
Message 5
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Subject: | ShopGoodwill.com |
I seems to me if you sell for profit, something someone gave you for free (and
you are a non-profit), you are generating taxable income which would be disallowed/taxable
unless you re-invested that income into the process you have established
the 401c for in the first place. Education, save the world and so on.
If that's the case then my purchase goes into the not-for-profit folder which supports
Goodwill's save-the-world operation which is a tax free deduction for
me.
If my purchase goes towards Jet-A for Goodwill's Citation or dinner for the execs
and their lovely wives, that may be bending the rules. All depends on whether
their policy is to provide a tax deductible receipt for the purchase.
Either way, there is plenty of dirt to go around in America and giving money away
is still 1 of the best tax deductions out there.
Be generous,
Glenn
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Paul Millner
Sent: Monday, March 12, 2012 12:01 PM
Subject: Re: AeroElectric-List: ShopGoodwill.com
Seems like there'd only be a tax deduction to the extent you pay MORE
than something is worth. If you're getting goods for what they're
worth, or presumably much less, no deduction.
Of course, you can claim whatever pleases you... but that wouldn't be
sound accounting practice.
Paul
On 3/9/2012 4:21 PM, Eric M. Jones wrote:
> it's all tax deductible (I think)
--
Please note my new email address!
millner@me.com
Message 6
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Subject: | Re: Jabiru 3300 Over Voltage |
At 07:01 PM 3/11/2012, you wrote:
Thanks for the response Bob. I know I'm getting an over voltage event
because is trips the 5 amp breaker in the over voltage circuit and
it's hot to the touch, plus I can see the voltage increase on the
EFIS most of the time, otherwise reviewing the recorded EFIS data (1
second increments).
The breaker is hot to the touch? The EFIS display
shows a bus voltage on the same order as that which
the OV module is designed to stand off . . . i.e. 16 volts
or more?
What are your 'normal' voltage readings?
This happened once early in phase 1 but has progressed to where it
will happen multiple times per flight now. If I keep the landing
lights on I can prevent the event.
Do you have a wiring diagram of how things
are hooked up with wire sizes and all?
One curious change, it used to take a few minutes for the breaker to
cool off before it would reset. Since I moved the yellow IGN wire
from the OV relay to the battery positive terminal when the voltage
increases and trips the OMV I can toggle the alternator switch and
immediately bring the alternator back online.
Hmmmm . . . breaker that has been tripped by
a triggered OVM shouldn't warm up to the touch
at all. In other words, that breaker carries only
relay current . . . about 0.15 amps. The current
spikes to many tens of amps during a crowbar event
thus opening the alternator breaker in a heartbeat . . .
to fast for it to accumulate any perceivable temperature
rise. What kind of breaker is it?
I have replaced the OVM14 and the voltage regulator and haven't
eliminated the problem. Any help would be appreciated.
Need to see your wiring diagram along with a narrative
of voltages you're observing during 'normal' or 'trip
free' operations.
Bob . . .
Message 7
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Subject: | Re: Joining 'coax' cable |
At 09:35 AM 3/12/2012, you wrote:
Hi Guys (Bob)
I will be completing the wiring to out RV9a prior to moving the
wings, and 'fuse' to the hanger, while I'm Ok with the wires from the
landing light, nav light etc to be conntected inside the fuse when
the wings are mounted with connectors, what do I do about about the
'coax' for the strobe light - in an ideal world I guess one continous
lead, but can I join two lengths of 'coax' together, what connector
do I use, so as not to compromise the integrity of the 'coax' sheathing
Strobe lights are not wired with coax . . . but 3-wire
shielded cable. You can break this cable for the purpose
of inserting a connector but it would be better just to
disconnect the wire at the power supply and pull the
'stub' out of the fuselage. If you DO put a connector in,
use a 4 pin connector (white nylon mate-n-lock or
waldom-molex)
http://www.radioshack.com/product/index.jsp?productId=2103250
and treat the shield connections just as you would a 4th wire.
Bob . . .
Message 8
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Subject: | Coolie Hat Switch |
Subject: devices on the relay deck
From: Janet Amtmann <jgamtmann2@gmail.com>
Bob,
What are the 5 devices in each channel of your prelim design of the
relay deck? They look like a mixing bowl balanced on a marble laid
on the side. You can reply on the List. Thanks
Jurgen Amtmann
Those are 2-input NAND gates,
(Two HIs gets you a LO, any LO gets you a HI)
I use the CD4093 quad 2-input a lot in these applications.
The part numbers for all the devices will be included on
the final iteration.
Bob . . .
Message 9
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Subject: | Re: Jabiru 3300 Over Voltage |
Bob my wiring diagram is attached to my message about 3 above this one. I've attached
a chart of of two flights, one about a year ago where you can see a pretty
steady 14 volts and a more recent flight where you see the very fast spikes
to 15 plus volts. Other charts/datasets show spikes up to 16 volts and a more
drastic swings. Hope this helps.
--------
Rich Whittington
Tullahoma, TN
Zenith 601HDS
Corvair 3 Liter 120HP
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=368320#368320
Attachments:
http://forums.matronics.com//files/voltage_comparison_107.pdf
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