Today's Message Index:
----------------------
1. 05:01 AM - Re: Fuel pressure automatic switch? (Eric M. Jones)
2. 07:21 AM - What is difference: bnc vs. tnc connectors? (LarryRobertHelming)
3. 08:05 AM - Re: What is difference: bnc vs. tnc connectors? (Dan Brown)
4. 09:02 AM - Re: What is difference: bnc vs. tnc connectors? (LarryRobertHelming)
5. 11:38 AM - Re: RV-List: GPS Antenna (Larry Bowen)
6. 01:44 PM - Re: Re: RV-List: GPS Antenna (Robert L. Nuckolls, III)
7. 01:56 PM - Re: RV-List: Coax Connector Frustration (Robert L. Nuckolls, III)
8. 01:57 PM - spoofed e-mail address . . . (Robert L. Nuckolls, III)
9. 11:11 PM - RG-180 Coax? (richard@riley.net)
Message 1
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| Subject: | Re: Fuel pressure automatic switch? |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
>>How would you handle a low boost / high boost
>>requirement and a momentary low boost / high boost requirement? My hot
>>starting method involves a momentary low boost switch.
>>Regards, Steve Richard
Steve, I don't know but perhaps the following will help:
By the way--I must credit Clifford Dow for the idea. Yours is coming Cliff.
"Soon".
> How does this this Logic work?
This system presumes (but doesn't require) that you have an electric boost
pump and an engine driven
mechanical fuel pump.When ON is selected, the boost pump turns on as long as
the switch remains
ON. When AUTO is selected, the electric boost pump turns on only if low
pressure is detected.
If you climbed in your airplane and selected AUTO immediately, the
Boos'Witch would sense low fuel pressure and latch the electric boost pump
on. Flipping the switch back to ON would have no effect (the pump would stay
on), and the pump would turn off if OFF was selected.
So basically--
OFF commands the boost pump OFF (regardless of anything).
ON turns the boost pump ON (regardless of anything).
AUTO turns the boost pump ON --if and only if-- low fuel pressure is
detected.
This is a simple and logically correct way to do this. If you throttle back
to
the point where the fuel pressure falls (IF you can do this), or turn off
the engine in flight, the boost pump WILL turn on.
Be aware of this when playing around.
If you have an electric fuel pump and an electric boost pump. This works
about the same, unless your standard start-up procedure is to turn on the
main electric pump; then you have to decide what you wanted to do.
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
"The whole difference between construction and creation is exactly this:
that a thing constructed can only be loved after it is constructed;
but a thing created is loved before it exists."
--Charles Dickens
Message 2
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| Subject: | What is difference: bnc vs. tnc connectors? |
--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
I got female type coax cable connectors on the Garmin430 antenna lead ins
and need to plug something into it. I know it is male type and round. I
assume it is BNC but there is also TNC. What is the diff or does it matter?
(Sometimes a little knowledge paralizes.)
Message 3
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| Subject: | What is difference: bnc vs. tnc connectors? |
--> AeroElectric-List message posted by: "Dan Brown" <dan@familybrown.org>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
> From: LarryRobertHelming
> assume it is BNC but there is also TNC. What is the diff or does
BNC is a bayonet-type connector (twist-lock), while TNC is threaded.
- --
Dan Brown, KE6MKS, dan@familybrown.org
"Since all the world is but a story, it were well for thee to buy the
more enduring story rather than the story that is less enduring."
-- The Judgment of St. Colum Cille
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Message 4
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| Subject: | Re: What is difference: bnc vs. tnc connectors? |
--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
Thank you.
Indiana Larry, RV7 Tip-up TMX-O-360 ACS2002 Dynon CNS430 Digitrak
On Finish Kit
----- Original Message -----
From: "Dan Brown" <dan@familybrown.org>
Subject: RE: AeroElectric-List: What is difference: bnc vs. tnc connectors?
> --> AeroElectric-List message posted by: "Dan Brown" <dan@familybrown.org>
>
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> > From: LarryRobertHelming
>
> > assume it is BNC but there is also TNC. What is the diff or does
>
> BNC is a bayonet-type connector (twist-lock), while TNC is
threaded.
>
> - --
> Dan Brown, KE6MKS, dan@familybrown.org
Message 5
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| Subject: | RE: RV-List: GPS Antenna |
--> AeroElectric-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
Related, but different -
I was planning on using the stock ant that came with the Garmin 196 (any
reason why I shouldn't?), and mounting it on the glare shield. Only
problem is the plug at the end is rather large, maybe 1/2" in diameter.
So I'll have to drill a big hole in the glare shield to pass it through.
Any way to avoid this? Disassemble? Splice? Something else?
Thanks,
-
Larry Bowen, RV-8 systems
Larry@BowenAero.com
http://BowenAero.com
2003 - The year of flight!
> -----Original Message-----
> From: Charles Brame [mailto:charleyb@earthlink.net]
> Sent: Saturday, August 23, 2003 1:16 PM
> To: Rick Galati; RV List
> Subject: RV-List: GPS Antenna
>
>
> --> RV-List message posted by: Charles Brame <charleyb@earthlink.net>
>
> Rick,
>
> The GPS Antenna supplied with my UPS SL-60 measures 3.5" x
> 2.25" x .75" not counting the connector. The antenna sits
> flush on its mounting surface with the connector on the
> bottom of the antenna and extending through a hole in the
> mounting surface. The measurements above are for the mounted antenna.
>
> Suggestion: Go to the nearest model hobby shop and buy a
> large model airplane engine mount. The mount is plastic fiber
> and weighs about an ounce. Cost is probably less than $10.
> Install the mount on your firewall and bolt a piece of
> aluminum sheet (.032 or as desired) where the model engine
> would be installed. The aluminum sheet should be just wide
> enough to cover the model engine mounts and can be of
> whatever length you need to extend the antenna away from your
> firewall. The GPS antenna can be installed on the aluminum
> sheet. Quick, easy, lightweight and looks professional.
>
> Charlie
> RV-6A N11CB
> San Antonio
>
> ------------------------------------------
>
> > Time: 06:31:51 AM PST US
> > From: Rick Galati <rick6a@yahoo.com>
> > Subject: RV-List: GPS Antenna
> >
> > --> RV-List message posted by: Rick Galati <rick6a@yahoo.com>
> >
> > Listers,
> >
> > I am going to mount a GPS antenna under the cowl onto a small shelf
> > fastened to the firewall. I do not have a GPS as yet. I
> need to know
> > the dimensions of your average panel mount GPS antenna in height,
> > length and width to insure that the shelf is fabricated to an
> > acceptable size. Thanks in advance for any suggestions as to the
> > proper surface area of a generic GPS antenna shelf mounted
> under the cowl.
> >
> > Rick Galati RV-6A FWF
Message 6
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| Subject: | Re: RE: RV-List: GPS Antenna |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 02:37 PM 8/23/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
>
>Related, but different -
>
>I was planning on using the stock ant that came with the Garmin 196 (any
>reason why I shouldn't?), and mounting it on the glare shield. Only
>problem is the plug at the end is rather large, maybe 1/2" in diameter.
>So I'll have to drill a big hole in the glare shield to pass it through.
>Any way to avoid this? Disassemble? Splice? Something else?
Is the connector something nice like a BNC connector
like this . . .
http://www.aeroelectric.com/articles/RG58/RG58_Not5.jpg
or something else? If it's a BNC or other popular connector,
you could just cut it off and replace it.
Bob . . .
Message 7
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| Subject: | Re: RV-List: Coax Connector Frustration |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
----- Original Message -----
From: "Tim Bryan" <tim@bryantechnology.com>
Subject: RV-List: Coax Connector Frustration
> --> RV-List message posted by: "Tim Bryan" <tim@bryantechnology.com>
>
> Hello Listers,
>
> I began putting my crimp on coax connectors on and for the first 2 or 3 it
> went fine. Then I couldn't any longer crimp the tiny little pin end
without it breaking.
>
> I ran out of connectors so I ordered new ones from Van's only to find out
> the center pin is not big enough to fit over the stranded center conductor
> of the RG-58A/U coax. I ordered again this time from Chief aircraft where
> the originals came from. Once again they BARELY fit into the center but
> will fit. My 100. crimp tool I bought is causing the center pin crimp to
> break when I crimp it. I just ruined 3 more connectors at $ 5.95 each.
> What is the secret to this? Can't afford to keep buying connectors so 1 out
> of 3 or 4 will work.
Not all connectors and tools to install them are interchangeable.
BNC connectors come in a variety of configurations to accommodate
a variety of coax cables. . .
>
> My tool is the AMP Pro Crimper II with the special RG-58/RG-59 jaws in it
> and the male crimps I am using are also Amp. Both from Chief Aircraft.
. . . . then, it is possible that application tooling is tuned
to work best with connectors by the same manufacturer. Interchangeability
probability is better if the connectors and tools are built to the same
specs . . . but buying mil-spec connectors and tools can dramatically
affect the price.
We avoided these hassles with coax/tools/connectors offered on
the AeroElectric Connection website by making sure that the
materials we sold were all compatible with each other in spite
of their varied commercial pedigrees. I don't know that Van's
has anyone on board that is knowledgeable about such things.
Connectors don't need to cost that much. B&C sells the connectors
I used to have in packages of 6 for $10 at:
http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?23X358218
These work nicely with the $40 coax tool at:
http://www.bandc.biz/cgi-bin/ez-catalog/cat_display.cgi?9X358218
to install on RG-400, RG-142 or RG-58 coax.
I am mystified by your early success followed by some failures.
Without examining your tool and it's compatibility with the
connectors, I'm at a loss to diagnose the problem.
Bob . . .
Message 8
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| Subject: | spoofed e-mail address . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
This morning I received a bunch of bounced e-mail
messages supposedly mailed by me to a variety of
folks I do not know. For each one that bounced
due to bad or closed e-mail account, there have
to be lots of folks who did receive the message
and believe that originated with me.
A telling bit of text from the bounce notification
says that the email originated from a Microsoft
Outlook application.
This is but one reason why I use Eudora as a
e-mail client . . . known to but most often ignored
by those who craft mischievous programs.
I couldn't tell if the outgoing message carried
an attachment but thought I would offer this
heads-up to folks on the List. I VERY RARELY
send attachments via e-mail. I prefer to load
reference documents to my server and offer links
via e-mail for retrieval by your browser.
If anything shows up in your mailbox from me or
anyone else with an attachment that doesn't make
immediate and clear sense (like we've been having a
discussion and the message accompanying the attachment
described the data and what it's about), zap it away.
Further, the only attachments I ever send will end
in .pdf .jpg or .gif . . . NONE of which have
yet been crafted to carry malicious code.
I would like to believe everyone on the List has
a good virii-zapper and everyone is cautious about
unexpected attachments. Some PC somewhere is
doing it's damnedest to pretend that it lives
at my house. . . Given that some extra-ordinarily
ugly things are afoot on the 'net these days we
need to be sensitive to slightly out-of-the-ordinary
events . . . even when they look like they're from
somebody you would otherwise trust.
Bob . . .
--------------------------------------------
( Knowing about a thing is different than )
( understanding it. One can know a lot )
( and still understand nothing. )
( C.F. Kettering )
--------------------------------------------
Message 9
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--> AeroElectric-List message posted by: richard@riley.net
I've just bought a large reel of RG-180 coax surplus. It's either the
biggest bargain I've ever found, or it's money down the drain.
Compared to RG-400, it's smaller, lighter, bends tighter and has more
attenuation - at 1 ghz and 100', it's 19.2 DB lost, vrs 14.1 for RG
400. The center core is 7 strands instead of 19. The rest of the specs are:
M17/95-RG180
Center Conductor.0120"(7/.004")SCCS
Dielectric .102" PTFE
Shield SPC
Jacket FEP
Diameter .141
Minimum Recommended Bend Radius 0.7
Temp. ( C) -55 +200
Weight (lbs./MFT) 19.8
M17/128-RG400
Center Conductor .0384"(19/.008")SC
Dielectric .116" PTFE
Shield SPC (2)
Jacket FEP
Diameter .195
Minimum Recommended Bend Radius 1.0
Temp. ( C) -55 +200
Weight (lbs./MFT) 50.0
Have I just bought myself a pile o'trouble, trying to find a crimp center
connector that will fit the smaller center conductor?
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