Today's Message Index:
----------------------
1. 12:00 AM - Multiple wires in a D-Sub pin? ()
2. 03:25 AM - Re: Battery Bus Lead Length? (Neville Kilford)
3. 05:18 AM - Re: Battery Bus Lead Length? (Dave Morris)
4. 06:29 AM - PM Starter motors (Fiveonepw@aol.com)
5. 06:47 AM - Re: Buttsplice vs. Solder Heatshrink? (LarryRobertHelming)
6. 07:09 AM - Re: Keeping Cables Separated (Robert L. Nuckolls, III)
7. 07:18 AM - Re: Low Density 9-PIN D-Sub Dust cover.... (Robert L. Nuckolls, III)
8. 07:18 AM - Re: Multiple wires in a D-Sub pin? (Robert L. Nuckolls, III)
9. 07:28 AM - Re: Battery Bus Lead Length? (Robert L. Nuckolls, III)
10. 07:35 AM - Re: single connector for instrument panel? (Robert L. Nuckolls, III)
11. 07:37 AM - Re: Low Density 9-PIN D-Sub Dust cover.... (Boss)
12. 08:28 AM - Dsub covers (Fergus Kyle)
13. 08:29 AM - Re: Re: SD-8 cap (Glen Matejcek)
14. 08:40 AM - Re: (Robert L. Nuckolls, III)
15. 09:12 AM - Battery Bus Lead Length/external power plug (Werner Schneider)
16. 10:13 AM - Re: Low Density 9-PIN D-Sub Dust cover.... (flmike)
17. 11:58 AM - Re: Dsub covers (kempthornes)
18. 12:37 PM - big switch (Troy Scott)
19. 02:24 PM - KT76A connector (Hobby Stevens)
20. 02:44 PM - Stein Bruch is alive! (Hebeard2@aol.com)
21. 03:33 PM - Essential Bus Alt Feed Wire Protection (James Redmon)
22. 03:38 PM - Re: KT76A connector (Gary Liming)
23. 04:24 PM - Re: big switch (Robert L. Nuckolls, III)
24. 04:30 PM - Re: Re: Re: SD-8 cap (Robert L. Nuckolls, III)
25. 04:31 PM - Re: Battery Bus Lead Length/external power (Robert L. Nuckolls, III)
26. 07:27 PM - Re: Testing the OVM in-situ . . . (Robert L. Nuckolls, III)
27. 07:55 PM - Garage Sale (czechsix@juno.com)
28. 08:00 PM - SuperBright Leds (LarryRobertHelming)
29. 08:46 PM - Re: SuperBright Leds (Hi There)
30. 09:16 PM - Stereo amp. (Larry Bowen)
31. 09:58 PM - Keeping Cables Separated 2 (Don Boardman)
32. 10:00 PM - Re: SuperBright Leds (Robert McCallum)
33. 10:19 PM - Main/E-bus Switching Sequence (Don Boardman)
Message 1
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| Subject: | Multiple wires in a D-Sub pin? |
--> AeroElectric-List message posted by: <scott_m_richardson@sbcglobal.net>
There are a number of places where it would be useful to have two wires
(22ga) come
together at a D-Sub pin or socket (in my case, splitting the altitude
encoder signals between
a transponder and IFR GPS unit). Two 22ga wires will fit into an
uncrimped pin, which
leads me to think that I should be able to get a good crimp. Is this
acceptable/recommended
practice or should I be using a butt splice outside of the D-Sub
connector?
Thanks for any advice.
Scott
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Scott M. Richardson
scott_m_richardson@sbcglobal.net
Message 2
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| Subject: | Re: Battery Bus Lead Length? |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
I believe that the main concern is over having a long unprotected wire. Six
inches is arbitrary -- it could be longer, as required, but there is more
risk of damage, etc., in a longer wire. Presumably risks can be mitigated by
taking care to think about ways in which the cable might become damaged in
normal use (chafing, for example) or in a crash.
Perhaps Bob and others will add to my simplistic view of things.
Cheers.
Nev
--
Jodel D-150 in progress
UK
----- Original Message -----
From: "hollandm" <hollandm@pacbell.net>
Subject: AeroElectric-List: Battery Bus Lead Length?
> --> AeroElectric-List message posted by: "hollandm" <hollandm@pacbell.net>
>
> In Bob's drawings, the battery bus feed length is specified as "6-inches
or less". Since the battery and bus are on opposite sides of the firewall
this may be a difficult specification to meet thus how critical is this?
>
> What factors, other than providing a sufficient size wire for the loads
anticipated and appropriate circuit protection, enter into this spec.?
>
> Thanks
>
>
Message 3
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| Subject: | Re: Battery Bus Lead Length? |
--> AeroElectric-List message posted by: Dave Morris <dave@davemorris.com>
I think I remember that the 6 inch figure relates to a standard for the
maximum length of wire that does not need to be fused.
Dave Morris
At 05:20 AM 1/8/2004, you wrote:
>--> AeroElectric-List message posted by: "Neville Kilford"
><nkilford@etravel.org>
>
>I believe that the main concern is over having a long unprotected wire. Six
>inches is arbitrary -- it could be longer, as required, but there is more
>risk of damage, etc., in a longer wire. Presumably risks can be mitigated by
>taking care to think about ways in which the cable might become damaged in
>normal use (chafing, for example) or in a crash.
>
>Perhaps Bob and others will add to my simplistic view of things.
>
>Cheers.
>
>Nev
>
>--
>Jodel D-150 in progress
>UK
>
>----- Original Message -----
>From: "hollandm" <hollandm@pacbell.net>
>To: <aeroelectric-list@matronics.com>
>Subject: AeroElectric-List: Battery Bus Lead Length?
>
>
> > --> AeroElectric-List message posted by: "hollandm" <hollandm@pacbell.net>
> >
> > In Bob's drawings, the battery bus feed length is specified as "6-inches
>or less". Since the battery and bus are on opposite sides of the firewall
>this may be a difficult specification to meet thus how critical is this?
> >
> > What factors, other than providing a sufficient size wire for the loads
>anticipated and appropriate circuit protection, enter into this spec.?
> >
> > Thanks
> >
> >
>
>
Message 4
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| Subject: | PM Starter motors |
--> AeroElectric-List message posted by: Fiveonepw@aol.com
Oooops, musta missed something- can someone explain what "adding the run-on
eliminator would be a good idea" is all about?I may have skipped class
that day........
Thanks!
Mark - do not archive
Message 5
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| Subject: | Re: Buttsplice vs. Solder Heatshrink? |
--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
Nothing wrong with that approach. If you have several to do, don't do them
all at the same spot but space them out so you can later shrink over the
whole bunch and not look like a snake that swallowed an egg. Another thing
to consider is using the machined d-sub pins. After you put a pin on each
joining wire, you slide a hear shrink on and shrink it down after plugging
together. Works nice on the wires that might need to come back apart at a
later time but costs more. But for things like the panel where there are
lots of connections, you should consider Bob's suggestion that was posted
yesterday of using the D-sub connector with machined pins using safety wire
to hold the two halves together.
Keep in mind solder does make a hard connection and that needs some relief
with the heat shrink and other supports.
Best wishes. Larry in Indiana
----- Original Message -----
From: "hollandm" <hollandm@pacbell.net>
Subject: AeroElectric-List: Buttsplice vs. Solder Heatshrink?
> --> AeroElectric-List message posted by: "hollandm" <hollandm@pacbell.net>
>
> My question is dirt simple. Is there any particular reason why a solder
joint, covered by heat shrink, isn't as good or functional as a butt splice?
>
> Perhaps I'm missing something but the solder joint would seem to be
simpler, lighter and electrically equivalent to a compression fitted splice.
>
> Looking at having to do a lot of joining or two or more wires!
>
> Mike Holland
>
>
Message 6
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| Subject: | Re: Keeping Cables Separated |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 12:29 AM 1/8/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: Don Boardman <dboardm3@twcny.rr.com>
>
>Hi Bob,
>
>PS Engineering in the installation manual for their PMA4000 Series Selector
>Panel and Intercom system under NOISE state:
>
>"Radiated signals can be a factor when low level microphone signals are
>"bundled" with current carrying power wires. Keep these (I assume they mean
>the mic and phone) cables physically separated."
No, keep avionics and instrumentation wiring separate
from power distribution wiring. This is generally easy to do
since avionics/instrumentation tend to be central on the
panel while power distribution/control can be along the
edges and around the skin of the aircraft.
Bob . . .
-----------------------------------------
( Experience and common sense cannot be )
( replaced with policy and procedures. )
( R. L. Nuckolls III )
-----------------------------------------
Message 7
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| Subject: | Re: Low Density 9-PIN D-Sub Dust cover.... |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:23 PM 1/7/2004 -0800, you wrote:
>--> AeroElectric-List message posted by: "Jack Lockamy" <jacklockamy@att.net>
>
>I'm not sure there is such a thing..... a black plastic cover for 9-PIN
>D-Sub connectors.. but I am curious if anyone has a known source for such
>an item.
>I am planning to install 9-PIN D-Sub connectors on my instrument panel so
>I can run a serial data cable to a laptop computer and record GRT EIS data
>and calibrate/update the Dynon EFIS-D10 data. Leaving the D-subs exposed
>on the panel is un-sitely and I would like to have black plastic covers to
>mask these and keep dirt/dust away from the exposed pins. More of a
>cosmetic thing than anything else.....
I've seen them. Folks who specialize in protective
caps for pipes, tubing and connectors will have them
but usually in bags of 100 for some manufacturer's needs.
I don't recall having seen them as catalog items in
small quantities. I searched my usual on-line suppliers
without success. If I run across them in the future, I'll
post a note here.
Incidentally, while looking for these I stumbled onto
an offer for "fusible wire" . . . See:
http://www.imperialinc.com/items.asp?item=0713440
I'm not recommending these as suitable for any
application on our airplanes. I still prefer the
fiberglas covered 22759 wire as described elsewhere.
Just an interesting tid-bit on fusible links from
another segment of industry.
Bob . . .
-----------------------------------------
( Experience and common sense cannot be )
( replaced with policy and procedures. )
( R. L. Nuckolls III )
-----------------------------------------
Message 8
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| Subject: | Re: Multiple wires in a D-Sub pin? |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 12:00 AM 1/8/2004 -0800, you wrote:
>--> AeroElectric-List message posted by: <scott_m_richardson@sbcglobal.net>
>
>There are a number of places where it would be useful to have two wires
>(22ga) come
>together at a D-Sub pin or socket (in my case, splitting the altitude
>encoder signals between
>a transponder and IFR GPS unit). Two 22ga wires will fit into an
>uncrimped pin, which
>leads me to think that I should be able to get a good crimp. Is this
>acceptable/recommended
>practice or should I be using a butt splice outside of the D-Sub
>connector?
Bob . . .
Message 9
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| Subject: | Re: Battery Bus Lead Length? |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 11:20 AM 1/8/2004 +0000, you wrote:
>--> AeroElectric-List message posted by: "Neville Kilford"
><nkilford@etravel.org>
>
>I believe that the main concern is over having a long unprotected wire. Six
>inches is arbitrary -- it could be longer, as required, but there is more
>risk of damage, etc., in a longer wire. Presumably risks can be mitigated by
>taking care to think about ways in which the cable might become damaged in
>normal use (chafing, for example) or in a crash.
>
>Perhaps Bob and others will add to my simplistic view of things.
You got it right. When all switches are OFF, the goal is to
have no wire of significant current carrying capacity fed
by a fuse greater than 5A. An always hot feeder of that
size and length is considered an increased risk for post
crash fire and we work diligently to avoid them.
Bob . . .
Message 10
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| Subject: | Re: single connector for instrument panel? |
Jabiru J400
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Jabiru J400
At 06:46 PM 1/7/2004 -0600, you wrote:
>--> AeroElectric-List message posted by: Dave Morris <dave@davemorris.com>
>Jabiru J400
>
>Would one of the big 15 pin Molex connectors work well for this application?
>
>Dave Morris
ANY connector will FUNCTION. Connectors of this genere
are widely used in automotive applications . . . which
is pretty much okay because they install wires into
pins with automatic machines. I'd go with the D-sub
because of the way that machined pins are put on . . .
you can't make a poor connection. Someone else mentioned
the AMP circular plastic connectors that accept the
same 20AWG pins as a D-sub . . . these would be good
too.
I haven't used a mate-n-lock/molex style connector
in a new design in decades.
Bob . . .
Message 11
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| Subject: | Re: Low Density 9-PIN D-Sub Dust cover.... |
--> AeroElectric-List message posted by: "Boss" <bossone@cox.net>
Go to RADIO SHACK
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: Re: AeroElectric-List: Low Density 9-PIN D-Sub Dust cover....
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>
> At 10:23 PM 1/7/2004 -0800, you wrote:
> >--> AeroElectric-List message posted by: "Jack Lockamy"
<jacklockamy@att.net>
> >
> >I'm not sure there is such a thing..... a black plastic cover for 9-PIN
> >D-Sub connectors.. but I am curious if anyone has a known source for such
> >an item.
>
>
> >I am planning to install 9-PIN D-Sub connectors on my instrument panel so
> >I can run a serial data cable to a laptop computer and record GRT EIS
data
> >and calibrate/update the Dynon EFIS-D10 data. Leaving the D-subs exposed
> >on the panel is un-sitely and I would like to have black plastic covers
to
> >mask these and keep dirt/dust away from the exposed pins. More of a
> >cosmetic thing than anything else.....
>
> I've seen them. Folks who specialize in protective
> caps for pipes, tubing and connectors will have them
> but usually in bags of 100 for some manufacturer's needs.
> I don't recall having seen them as catalog items in
> small quantities. I searched my usual on-line suppliers
> without success. If I run across them in the future, I'll
> post a note here.
>
> Incidentally, while looking for these I stumbled onto
> an offer for "fusible wire" . . . See:
>
> http://www.imperialinc.com/items.asp?item=0713440
>
> I'm not recommending these as suitable for any
> application on our airplanes. I still prefer the
> fiberglas covered 22759 wire as described elsewhere.
> Just an interesting tid-bit on fusible links from
> another segment of industry.
>
> Bob . . .
>
> -----------------------------------------
> ( Experience and common sense cannot be )
> ( replaced with policy and procedures. )
> ( R. L. Nuckolls III )
> -----------------------------------------
>
>
Message 12
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--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
"--> AeroElectric-List message posted by: "Jack Lockamy"
<jacklockamy@att.net>
I'm not sure there is such a thing..... a black plastic cover for 9-PIN
D-Sub connectors..but I am curious if anyone has a known source for such an
item.
I am planning to install 9-PIN D-Sub connectors on my instrument panel so I
can run a serial data cable to a laptop computer and record GRT EIS data and
calibrate/update the Dynon EFIS-D10 data. Leaving the D-subs exposed on the
panel is un-sightly and I would like to have black plastic covers to mask
these and keep dirt/dust away from the exposed pins. More of a cosmetic
thing than anything else..... Any links, part nos. or manufacturer's phone
number would be greatly appreciated...TIA, Jack Lockamy"
Would two-or-three inch heatshrink do? (Cheap, replaceable, locally avail)
Ferg
Europa A064 mono
Message 13
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| Subject: | RE: RE: SD-8 cap |
--> AeroElectric-List message posted by: "Glen Matejcek" <aerobubba@earthlink.net>
>>
>From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>Subject: Re: AeroElectric-List: RE: SD-8 cap
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>At 08:31 PM 1/6/2004 -0600, you wrote:
>>--> AeroElectric-List message posted by: Dave Morris <dave@davemorris.com>
>>
>>The value isn't critical. The larger the value, the larger the charge it
>>can store and the more the cap will look like a "battery" in case the
>>battery isn't there.
>
>>Dave Morris
>Dave is correct. B&C's drawings for recommended capacitor
>does indeed call out a 10KuF cap but I think the only one
>they sell is the S251D479 shown at
>http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?26X358218
>which is 47KuF at 16V.
>
>Bob . . .
Hmmmm... The one they sent me is a Sprauge 10k uF 50V cap, and I'm feeling
a bit of cap envy. Perhaps I should call B&C and find out what's up. I
hate to sound like a lawyer, but I presume a change in spec represents an
increase in performance.
gm
Message 14
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--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:15 AM 1/8/2004 -0600, you wrote:
>Bob,
>
>Our 503-1 kit, which is the noise filter cap kit, has the 10KuF cap in
>it. Attached is a picture of it. It sells for $33.00. So we sell both
>sizes of caps.
Okay, I stand corrected. Thanks for the info!
Bob . . .
>
>
>Todd
>
>
>Time: 07:44:26 AM PST US
>
>From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>
>Subject: Re: AeroElectric-List: RE: SD-8 cap
>
>
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
>
>--> <bob.nuckolls@cox.net>
>
>
>At 08:31 PM 1/6/2004 -0600, you wrote:
>
> >--> AeroElectric-List message posted by: Dave Morris
>
> >--> <dave@davemorris.com>
>
> >
>
> >The value isn't critical. The larger the value, the larger the charge
>
> >it can store and the more the cap will look like a "battery" in case
>
> >the battery isn't there.
>
> >
>
> >Dave Morris
>
>
> Dave is correct. B&C's drawings for recommended capacitor
>
> does indeed call out a 10KuF cap but I think the only one
>
> they sell is the S251D479 shown at
>
>
><http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?26X358218>http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?26X358218
>
> which is 47KuF at 16V.
>
>
> Bob . . .
>
>
Bob . . .
-----------------------------------------
( Experience and common sense cannot be )
( replaced with policy and procedures. )
( R. L. Nuckolls III )
-----------------------------------------
Message 15
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| Subject: | Battery Bus Lead Length/external power plug |
--> AeroElectric-List message posted by: "Werner Schneider" <wernerschneider@compuserve.com>
Hello Bob and all,
what is the risk, I would like to mount an external power plug, but would
like a bit simpler approach as the top setup Bob has on the web. I'm using
it myself only (charging) and very seldom jumpstart. The plug will be around
4-6 inches from the batterie. What is against to connect the plug directly
to the batterie, what would you recommend?
Many thanks for your advice
Werner
Message 16
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| Subject: | Re: Low Density 9-PIN D-Sub Dust cover.... |
--> AeroElectric-List message posted by: flmike <flmike2001@yahoo.com>
Try:
http://www.niagaraplastics.com/prodsub.asp?site=dsub_icp.htm
http://www.caplugs.com/catalog/starpage.asp?series=17&seriesid=17&classid=122
(Caplugs DCC series)
Not black, but I didn't look too hard. (You've got a
Sharpie marker right?)
They should be able to sample you a few.
If that doesn't work for you, you can make a nice
little cover out of a little piece of aluminum with a
couple 4-40 thumbscrews to hold it on. (or a $50 CNC
machined and anodized one with captive thumbscrews and
a bead-chain retainer like we put on the flight data
recorders at my old employer).
Mike
__________________________________
http://hotjobs.sweepstakes.yahoo.com/signingbonus
Message 17
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--> AeroElectric-List message posted by: kempthornes <kempthornes@earthlink.net>
Why not use female socket DB9 on the panel? Inset and fasten invisibly
such as with glue, it would look most cool IMHO.
At 11:29 AM 1/8/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
>
>I am planning to install 9-PIN D-Sub connectors on my instrument panel so I
K. H. (Hal) Kempthorne
RV6-a N7HK - Three trips to OSH now.
PRB (El Paso de Robles, CA)
Message 18
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--> AeroElectric-List message posted by: "Troy Scott" <tscott1217@bellsouth.net>
Gentlemen,
Does anyone have a source for a progressive off-on-on DPDT switch rated for
20amps? It needs to look about like the panel switches from B&C.
Thanks!
Troy Scott
tscott1217@bellsouth.net
Message 19
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--> AeroElectric-List message posted by: "Hobby Stevens" <rayco@sbcglobal.net>
I bought a used King KT76A transponder with the tray, but the edge card connector
that attaches to the tray is missing. I am looking for a source to purchase
the connector. I have not yet contacted King Radio directly (or BendixKing,
or Allied Signal/Honeywell, or whatever their name is now).
Based on an earlier post regarding King radio connectors, I looked on the Molex
website for the correct connector. I think that it would be Molex part #09-50-6125
(12 dual circuits). Using this part number and description, I then looked
at Digikey and Mouser, but I cannot find this particular Molex connector.
Any suggestions would be appreciated.
Thanks,
Hobby Stevens
(Got my late Xmas present today - my Garmin 430 arrived)
Message 20
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| Subject: | Stein Bruch is alive! |
--> AeroElectric-List message posted by: Hebeard2@aol.com
Guys,
Yesterday I heard from Stein Bruch. Seems his out of town vacation, a snow
storm, and misrouting of my shipment by UPS, all combined for the untimely delay
for which Stein apologized. Best of all my AK-450 ELT arrived today, one day
earlier than forecast.
All is well.
Harley E. Beard
Message 21
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| Subject: | Essential Bus Alt Feed Wire Protection |
--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
Bob,
Until recently, I was using the standard "canard" wiring configuration (aft
engine, front battery) with the Z-12 diagram. For CG reasons, I am better
off placing my battery in the aft compartment of the plane but not engine
side of the firewall. I have obviously have relocated the master relay,
battery and reduced the size cable running forward to the fuse blocks.
My question is, regarding the appropriate connection and type of protection
I should use for the Essential Bus alternate feed. It is planned to be a
12-15ft run of 12-gauge wire from battery to switch to bus. Should I use a
current limiter (alt. fuse type), fusible link, standard ATC fuse from a
battery bus, or something else?
Obviously, I want this connection to be resilient to nuisance trips, spike
loads, etc. as possible but still afford some reasonable protection for the
long run of wire.
Ideas? Other questions?
James Redmon
Berkut #013 N97TX
www.berkut13.com
Message 22
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| Subject: | Re: KT76A connector |
--> AeroElectric-List message posted by: Gary Liming <gary@liming.org>
At 04:23 PM 1/8/2004 -0600, you wrote:
>--> AeroElectric-List message posted by: "Hobby Stevens" <rayco@sbcglobal.net>
>
>I bought a used King KT76A transponder with the tray, but the edge card
>connector that attaches to the tray is missing. I am looking for a source
>to purchase the connector. I have not yet contacted King Radio directly
>(or BendixKing, or Allied Signal/Honeywell, or whatever their name is now).
>
> Based on an earlier post regarding King radio connectors, I looked on
> the Molex website for the correct connector. I think that it would be
> Molex part #09-50-6125 (12 dual circuits). Using this part number and
> description, I then looked at Digikey and Mouser, but I cannot find this
> particular Molex connector.
Go to
http://www.berkut13.com/extractor.htm
which is an interesting page that has Mouser part numbers for what you need.
(Thanks, James Redmon!)
Gary Liming
Message 23
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--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 02:38 PM 1/8/2004 -0600, you wrote:
>--> AeroElectric-List message posted by: "Troy Scott"
><tscott1217@bellsouth.net>
>
>Gentlemen,
>
>Does anyone have a source for a progressive off-on-on DPDT switch rated for
>20amps? It needs to look about like the panel switches from B&C.
Why 20A?
Bob . . .
Message 24
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| Subject: | Re: RE: RE: SD-8 cap |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 11:29 AM 1/8/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: "Glen Matejcek"
><aerobubba@earthlink.net>
>
>
> >>
> >From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
> >Subject: Re: AeroElectric-List: RE: SD-8 cap
>
> >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><bob.nuckolls@cox.net>
>
> >At 08:31 PM 1/6/2004 -0600, you wrote:
> >>--> AeroElectric-List message posted by: Dave Morris <dave@davemorris.com>
> >>
> >>The value isn't critical. The larger the value, the larger the charge it
> >>can store and the more the cap will look like a "battery" in case the
> >>battery isn't there.
> >
> >>Dave Morris
>
> >Dave is correct. B&C's drawings for recommended capacitor
> >does indeed call out a 10KuF cap but I think the only one
> >they sell is the S251D479 shown at
> >http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?26X358218
> >which is 47KuF at 16V.
> >
> >Bob . . .
>
>
>Hmmmm... The one they sent me is a Sprauge 10k uF 50V cap, and I'm feeling
>a bit of cap envy. Perhaps I should call B&C and find out what's up. I
>hate to sound like a lawyer, but I presume a change in spec represents an
>increase in performance.
Todd corrected my mis-statement about the caps offered by
B&C. At the time my parts business transferred to Newton
a couple years ago, B&C was selling a 10KuF for the SD-8,
I was selling a 47KuF for Rotax 912 installations. I had
some discussions with Bill at that time suggesting that
a single offering of the 47KuF would fulfill both requirements
nicely and I was under the mistaken impression that he'd
done that.
The rule-of-thumb for filter caps on power supplies is
1,000 uF/Amp of supply. Hence, the 10K is fine for SD-8,
and a 22K or larger was good for the 18A output on the
Rotax . .
At the time I selected the 47Kuf, I believe it was in
the same case diameter as the 22KuF and only slightly
longer and slightly more expensive . . . but it is
quite a bit larger than the 10KuF part Bill had already
brought on board for the SD-8. Obviously, both sizes
are now offered and the 10KuF you have is fine.
Bob . . .
Message 25
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| Subject: | Re: Battery Bus Lead Length/external power |
plug
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
plug
At 06:11 PM 1/8/2004 +0100, you wrote:
>--> AeroElectric-List message posted by: "Werner Schneider"
><wernerschneider@compuserve.com>
>
>Hello Bob and all,
>
>what is the risk, I would like to mount an external power plug, but would
>like a bit simpler approach as the top setup Bob has on the web. I'm using
>it myself only (charging) and very seldom jumpstart. The plug will be around
>4-6 inches from the batterie. What is against to connect the plug directly
>to the batterie, what would you recommend?
That will work.
Bob . . .
Message 26
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| Subject: | RE: Testing the OVM in-situ . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Whoa! Let's back up. I was visualizing something else when this question
came up. NO, there is no risk to other system components by simulating
an OV condition as described in the instructions at:
http://www.aeroelectric.com/articles/crowbar.pdf
Note that the 18 volt power (ship's battery + boost battery)
is applied only to the alternator regulator feed line
(which causes the regulator to shut down) and applied voltage
appears only across the OV module. Ignore all of previous
discussions below. The test procedure is safe and sanitary
as published.
Bob . . .
At 10:45 AM 1/6/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
>
>Alright. Thanks. Maybe that would be a good footnote to have on the
>testing schematic....Or is it already there and I missed it?
>
>-
>Larry Bowen
>Larry@BowenAero.com
>http://BowenAero.com
>
>
>Robert L. Nuckolls, III said:
> > --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> > <bob.nuckolls@cox.net>
> >
> > At 11:53 PM 1/5/2004 -0500, you wrote:
> >>--> AeroElectric-List message posted by: "Larry Bowen"
> >> <Larry@BowenAero.com>
> >>
> >>What if the OVM fails to do it's thing during the in-plane test? I'll
> >>subject everything on the master buss to abnormally high voltage.
> >>Right?
> >
> > you betch . . .
> >
> >> Is this a concern?
> >
> > yes . . .
> >
> >> Should I pull all the fuses from the master
> >>fuse block first?
> >
> > yes . . .
> >
> > I prefer to do a bench test on the OVM but it can
> > be done in the airplane after addressing the concerns
> > you've identified.
> >
> > Bob . . .
Message 27
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aeroelectric-list@matronics.com
--> AeroElectric-List message posted by: czechsix@juno.com
Guys, I have some stuff for sale. Everything came from Vans except the
VSI that I bought at Oshkosh. All prices are subject to negotiation so
if you think I'm a cheap tightwad (which is probably true), don't be
upset or insulted, just make me a reasonable offer. Buyer pays shipping.
Please respond OFF LIST if interested in anything!
VA-149-360-PC, Throttle/Mixture Bracket for O-360 carb, *FREE* to anyone
who is buying something else that I can ship it with. Vans price is $18,
this one has been slightly modified (long story) but should still work
just fine for the intended purpose....
IE F-385B and IE F-385C Stewart Warner Sending Units (left and right),
these were carefully bent to fit my RV-8A tanks (which should fit any
RV-7/8 wings, not sure about other models). I installed them and gooped
some proseal around the mount/gasket to help seal them, then removed them
when I put Princeton Capacitive probes in later. They won't win a beauty
constest but work fine and will save you some installation
time....they've never touched fuel but I verified them with an ohm meter
for proper operation. Vans price is $46 (or $23 each), asking $20 for
both of them together.
CT 82F, RV-8/8A 2-lever Throttle/Mixt Quadrant, was briefly installed in
my plane before I upgraded to CS prop. One of the aluminum plates on the
outboard side of the quadrant is painted with grey Rustoleum which could
be repainted, but it's mostly hidden when installed in the side console.
Vans price $39, asking $25.
EA CARB HEAT MUFF, new in the bag. Vans price $22.50, asking $17.
FAB-360, Filtered Airbox for O-360, Marvel Carb; IO-320/360 (180 hp)
Bendix Injection. New and unassembled. Vans price $120, asking $100.
IF-UMA-16-311-241D, RV-7/8 Air Speed Indicator, 3 1/8" diameter, outer
scale knots, inner mph. New in box. Vans price $143, asking $120.
IF BG-3B Altimeter, 3 1/8" diameter. New in box. Vans price $198,
asking $175.
UMA #8-310-30 Vertical Speed Indicator, +/- 3000 fpm scale, 3 1/8"
diameter. New in box. Pacific Coast Avionics price was $125, asking
$100.
Thanks for your interest and apologies for cluttering the List with this
stuff...
--Mark Navratil
Cedar Rapids, Iowa
RV-8A N2D would be flying by now if I'd quit changing stuff!
Do Not Archive
Message 28
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| Subject: | SuperBright Leds |
--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
I recently bought some LEDs from SuperBrightLeds. The product I bought was
the instrument cluster and gauge backligtt that comes in a base. Problem is
I don't have any idea what this base fits into. Any one have experience
with this? Their product code is T1.5 Instrument led bulb.
http://www.superbrightleds.com/cgi-bin/store/commerce.cgi?product=CAR&keywords=&cart_id=3829562.15232&next=50
Larry
Message 29
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| Subject: | Re: SuperBright Leds |
--> AeroElectric-List message posted by: Hi There <rv90619@yahoo.com>
Looks like a GM light. The ones that attach to the GM circuit board type IP.
Cam
LarryRobertHelming <lhelming@sigecom.net> wrote:
--> AeroElectric-List message posted by: "LarryRobertHelming"
I recently bought some LEDs from SuperBrightLeds. The product I bought was
the instrument cluster and gauge backligtt that comes in a base. Problem is
I don't have any idea what this base fits into. Any one have experience
with this? Their product code is T1.5 Instrument led bulb.
http://www.superbrightleds.com/cgi-bin/store/commerce.cgi?product=CAR&keywords=&cart_id=3829562.15232&next=50
Larry
---------------------------------
Message 30
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--> AeroElectric-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
I ran the music input on my NAT intercom to a 3.5mm jack. I turned the
pot adjustment on the intercom to max. But each of the three audio
devices I've tested as music input are very weak. Judging by the
archives I'm not alone. I searched the internet for "walkman amps" and
came across this:
http://www.hobbytron.net/CK154A.html
Think this will help the situation?
There is a hand-written note in the intercom installation manual I got
from NAT that notes the music in source should be 3v p-p (1v RMS). This
doesn't mean much to me, but if someone could translate, it might
provide some clues.
Thanks.
-
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com
Message 31
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| Subject: | Keeping Cables Separated 2 |
--> AeroElectric-List message posted by: Don Boardman <dboardm3@twcny.rr.com>
Bob, a follow up if I may.
>> "Radiated signals can be a factor when low level microphone signals are
>> "bundled" with current carrying power wires. Keep these (I assume they mean
>> the mic and phone) cables physically separated."
>
> No, keep avionics and instrumentation wiring separate
> from power distribution wiring.
By power distribution wiring, your mean the # 4's and the relayed # 12 to
the E-bus from the battery bus (under co-pilot's seat) RIGHT?
>This is generally easy to do
> since avionics/instrumentation tend to be central on the
> panel while power distribution/control can be along the
> edges and around the skin of the aircraft.
The Fat wires will run up through the floor on the co-pilot's side at the
firewall behind the rudder pedals and then across the firewall behind the
avionics and instrumentation to connect to the fuse blocks which are on a
hinged shelf located under and flush with the bottom of the panel on the
pilot's side. You responded to an earlier post and indicated that this
should not be a problem ... Yes?
AND
Soooooo ... running my shielded mic and phone cables from the intercom in
the panel to the rear passengers jacks side by side with my Fat current
carrying wires which they will meet up with at the firewall and then travel
back together under the floor is OK?
AND
Running my Transponder coax in this "bundle" (actually in a 2" wide
u-channel acting as a raceway or tray) is OK?
Thanks,
Don B.
Message 32
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| Subject: | Re: SuperBright Leds |
--> AeroElectric-List message posted by: Robert McCallum <robert.mccallum2@sympatico.ca>
LarryRobertHelming wrote:
>--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
>
>I recently bought some LED's from SuperBrightLeds. The product I bought was
>the instrument cluster and gauge backlight that comes in a base. Problem is
>I don't have any idea what this base fits into. Any one have experience
>with this? Their product code is T1.5 Instrument led bulb.
>http://www.superbrightleds.com/cgi-bin/store/commerce.cgi?product=CAR&keywords=&cart_id=3829562.15232&next=50
>
>Larry
>
>
They plug into the instrument panel on your car. The printed circuit
board on the back of many (most??) car dashboards have holes for the
various indicator light bulbs into which these bulbs fit. They are
retained by twisting them slightly so that they lock into the opening
much like a standard bayonet base bulb does into its socket. The metal
tabs on the edge of these bulbs contact the printed circuit traces
adjacent to the holes to achieve their connection.
Bob McC
Message 33
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| Subject: | Main/E-bus Switching Sequence |
--> AeroElectric-List message posted by: Don Boardman <dboardm3@twcny.rr.com>
Hi Bob,
I am wiring a 2-10 switch as my main Master Switch and also a 2-10 as my
E-bus "Alt Master" Switch (OFF, Alt Feed, Alt Feed/Aux Alt).
After losing the main alternator and while switching from the main bus to
the E-bus can both the main master and the E-bus master both be in the "BAT"
position at the same time as not to loose power to the E-bus during the
change over?
And in the same vain when the airport, or lake in my case, is made while
switching back from E-bus to main master's BAT position can both switches be
feeding the E-bus during the transition.
Hope my concerns are clear, its getting late,
Don B.
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