Today's Message Index:
----------------------
1. 12:33 AM - Re: Transponder Question (Keith Ashcraft)
2. 08:24 AM - Re: Transponder Question (Ray Montagne)
3. 01:44 PM - aileron trim tab size (Jeff Small)
4. 03:19 PM - Re: Re: Brass fittings and valves on aluminum tubing... (Thomas F Marson)
5. 03:30 PM - Re: Re: Brass fittings and valves on aluminum tubing... (Thomas F Marson)
6. 04:11 PM - Re: Brass fittings and valves on aluminum tubing... (Thomas F Marson)
7. 06:46 PM - Re: Transponder Question (Larry Martin)
8. 08:27 PM - Zenith Dinner @ Osh pics (Jon Croke)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Transponder Question |
--> Zenith-List message posted by: Keith Ashcraft <keith.ashcraft@itt.com>
Hi Larry,
If I understand you right, you have eliminated a shorted bnc cable, correct?
I don't know what the output power of the transponder is, I am guessing
around 150-200 watts. The output amp might look like low impedance. When
you are saying a short, are you using a digital meter and reading 0 ohms
or is it around 50 to 75 ohms?
This might give a better indication of the output amp. Also, if some
Zenith lister has a King KT76, they might be able to disconnect the
antenna and read the impedance of the amp output (this would be the
ideal way).
Keith
***********************************************************
Larry Martin wrote:
>--> Zenith-List message posted by: "Larry Martin" <earthloc@att.net>
>
>Having zero experience on transponders I have a basic question. I have a King
KT76 transponder I bought about a year ago through e-bay. It has a yellow card,
with repair information dated just before I bought it. I had no reason to think
it wouldn't work.
>I haven't wired it yet. I was wiring my Com coax and ohmed it to make sure of
no shorts. Then I happened to seen the Xponder cable and just stuck the ohm
meter to it. Dead short!!! Replaced the BNC ends on the cable, no help. Pulled
the xponder out of the shelf, ohmed the cable input, it was shorted or closed.
My question is, is it possible that the coax is normally closed when no
power is to it? I pretty sure I know the answer, but just double checking before
I take it to a avionics shop.
>
>
>Larry Martin, N1345L
>
>Take a look at my site. Larry's 701
>
>
>---
>
>
>
>
--
*************************************
*Keith Ashcraft*
ITT Industries
Advanced Engineering & Sciences
5009 Centennial Blvd.
Colorado Springs, CO
80919
(719) 599-1787 -- work
(719) 332-4364 -- cell
keith.ashcraft@itt.com
************************************
This email and any files transmitted with it are proprietary and intended solely
for the use of the individual or entity to whom they are addressed. If you have
received this email
in error please notify the sender. Please note that any views or opinions presented
in this email are solely those of the author and do not necessarily represent
those of ITT Industries, Inc.
The recipient should check this email and any attachments for the presence of viruses.
ITT Industries accepts no liability for any damage caused by any virus
transmitted by this
email.
************************************
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Transponder Question |
--> Zenith-List message posted by: Ray Montagne <ac6qj@earthlink.net>
On 7/31/04 12:29 AM, "Keith Ashcraft" <keith.ashcraft@itt.com> wrote:
> --> Zenith-List message posted by: Keith Ashcraft <keith.ashcraft@itt.com>
>
> This might give a better indication of the output amp. Also, if some
> Zenith lister has a King KT76, they might be able to disconnect the
> antenna and read the impedance of the amp output (this would be the
> ideal way).
>
> Keith
It isn't possible to read impedance with an ohm meter. An Ohm meter will
read resistance but not impedance. Injecting a D.C. Current into the
transmitter (which is what you do when you connect the ohm meter to the
transmitter antenna) is not something that someone should do.
DO NOT ARCHIVE
Ray Montagne
Cupertino, CA
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | aileron trim tab size |
Seal-Send-Time: Sat, 31 Jul 2004 16:44:21 -0400
--> Zenith-List message posted by: "Jeff Small" <zodiacjeff@msn.com>
If you make a trim tab too small it may require extreme deflection to work. Wish
mine were 55 mm by 350 mm (5 mm wider and 30 mm longer). The 65 mm by 370
mm size suggested a few days ago seems ideal. A large trim tab, even if larger
than necessary for your particular a/c and rigging, will require only minor
deflection and may create less drag than one marginally too small and deflected
to its limits.
Could find five 601's at OSH but didn't walk everywhere so there may have been
more in the various camping areas.
Beautiful HD in the EAA membership tent by Dave Alberti. (912 power)
Bill Morelli's HDS in the area in front of the new Homebuilders Building. (Stratus
power)
Greg Cook's Soob HD taildragger just north of Bill's a/c.
An HD in row 307 camping. (Soob power)
Mine in row 342 (Jab 3300)
..and...Fred Hulen's HDS parked at FLD. (3300)
Didn't see any builders' 701s or 801s.
tailwinds jeff
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: RE: Brass fittings and valves on aluminum tubing... |
--> Zenith-List message posted by: "Thomas F Marson" <tmarson@pressenter.com>
Your fuel line should be real soft alumimum in the 5000 series. Go ahead
and buy the tool and do the job right. It is only your life your betting on
it. tom
----- Original Message -----
From: "Bryan Martin" <bryanmmartin@comcast.net>
Subject: Re: Zenith-List: RE: Brass fittings and valves on aluminum
tubing...
> --> Zenith-List message posted by: Bryan Martin <bryanmmartin@comcast.net>
>
> on 7/29/04 8:43 PM, Brandon Tucker at btucke73@yahoo.com wrote:
>
> > --> Zenith-List message posted by: Brandon Tucker <btucke73@yahoo.com>
> >
> > Great question... I wanted to ask the same last
> > night, but didn't want to open said "can of worms."
> >
> > Then this
> > morning it dawned on me that my automotive flaring
> > tool is not 37 deg. I sure as heck don't want to pay
> > $$$ for an aviation flaring tool. So what is one to
> > do??
> >
> The tech councilor at my EAA chapter suggested that I flare them partially
> with the 45 degree tool and then finish the flare by tightening them in
the
> fitting. The soft aluminum line will form itself to the flare fitting. I
did
> this and also used DEL 37 fitting seals; my fittings don't leak
>
> > Also, NAPA doesn't carry aluminum fuel line at all.
> > Is there a national auto chain that carries fuel line?
> > I plan to use 3/8 OD. Is this what everyone is
> > using?
> >
>
> I couldn't find any locally so I ordered it from ACS (3003-0 Versatube).
>
>
> --
> Bryan Martin
> N61BM, CH 601 XL, Stratus Subaru.
> Construction complete.
> Getting the paperwork in order.
> do not archive.
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: RE: Brass fittings and valves on aluminum tubing... |
--> Zenith-List message posted by: "Thomas F Marson" <tmarson@pressenter.com>
Suggest you go to Wicks or ACS. buy AN all the way. It is not really very
much higher in the long run and is the right stuff for aircraft. Light, and
nearly bullet proof for vibration etc. Tom
----- Original Message -----
From: "Brandon Tucker" <btucke73@yahoo.com>
Subject: Zenith-List: RE: Brass fittings and valves on aluminum tubing...
> --> Zenith-List message posted by: Brandon Tucker <btucke73@yahoo.com>
>
> Great question... I wanted to ask the same last
> night, but didn't want to open said "can of worms."
>
> The only finger strainer and drain valves that I could
> find were brass, so I figured it is considered o.k.
> After purchasing the fittings from the local NAPA, I
> decided that I should go with AN fittings and ordered
> them online from ACS late last night. Then this
> morning it dawned on me that my automotive flaring
> tool is not 37 deg. I sure as heck don't want to pay
> $$$ for an aviation flaring tool. So what is one to
> do??
>
> Also, NAPA doesn't carry aluminum fuel line at all.
> Is there a national auto chain that carries fuel line?
> I plan to use 3/8 OD. Is this what everyone is
> using?
>
>
> R/
>
> Brandon
> HDS port wing almost complete
>
>
> __________________________________
> Y! Messenger - Communicate in real time. Download now.
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Brass fittings and valves on aluminum tubing... |
--> Zenith-List message posted by: "Thomas F Marson" <tmarson@pressenter.com>
Look in the Wicks catalog at the descriptions of 3003 al and 5052al. 5052
appears to be the better one for fuel and hydraulic lines. tom Marson
----- Original Message -----
From: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
Subject: RE: Zenith-List: Brass fittings and valves on aluminum tubing...
> --> Zenith-List message posted by: "Hinde, Frank George (Corvallis)"
<frank.hinde@hp.com>
>
> Ha, you do like to open a can of worms don't you...:)
>
> Well I have used brass fittings and 3033 alu tube everywhere (in fact I
> used 1/4" brass compression fittings from the hardware store with a dab
> of loctite on the cap) and have not seen any corrosion in the last five
> years.
>
> Conventional wisdom would say this is a bad idea...If you were pumping
> water I would agree, but with oily fuel it seems to be no problem at
> all.
>
> Frank
> 601 HDS 337 hours
>
> -----Original Message-----
> From: owner-zenith-list-server@matronics.com
> [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Bima,
> Martin
> To: zenith-list@matronics.com
> Subject: Zenith-List: Brass fittings and valves on aluminum tubing...
>
>
> --> Zenith-List message posted by: "Bima, Martin" <mbima@hydro.mb.ca>
>
> Is it common or not to use brass/bronze fittings and valves with
> aluminum tube and tanks?
>
> Working on fuel system in the wings now.
>
>
> Martin Bima
>
> STOL-Vair
> www.autobahn.mb.ca/~bima
>
>
> ==
> direct advertising on the Matronics Forums.
> ==
> ==
> ==
>
>
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Transponder Question |
--> Zenith-List message posted by: "Larry Martin" <earthloc@att.net>
Well, I finished wiring it up today. Double checked and then checked again the
pins. Nothing but a buzz, off to the avionics shop. I'm gonna box the whole
thing up and send it to Stein Air, he built my EFIS harness with transponder
leads. I'm sure he can fix it. Thanks for your suggestions. Do not archive.
Larry N1345L
----- Original Message -----
From: Ray Montagne
To: Zenith List
Sent: Friday, July 30, 2004 10:50 PM
Subject: Re: Zenith-List: Transponder Question
--> Zenith-List message posted by: Ray Montagne <ac6qj@earthlink.net>
On 7/30/04 8:08 PM, "Larry Martin" <earthloc@att.net> wrote:
> --> Zenith-List message posted by: "Larry Martin" <earthloc@att.net>
>
> My question is, is it possible that the coax is normally closed when
> no power is to it?
Yes, it is possible for a coax connected to an antenna to read a dead short
at D.C.. It depends on how the feed to the antenna is designed.
If the coax is indicating a short with both ends disconnected then you've
definitely got a problem. If one end is attached to the antenna then you
may or may not have a problem. You'll need to consult with the antenna
manufacturer or have a radio shop measure the antenna impedance at the
operating frequency it is intended to be used at as several antenna feed
schemes will read a D.C. Short but at R.F. Frequencies will exhibit a
significant impedance.
Don't try and perform that measurement with the transponder (or any radio)
connected to the feedline (coax)!
Ray Montagne
Cupertino, CA
---
Version: 6.0.729 / Virus Database: 484 - Release Date: 7/27/2004
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Zenith Dinner @ Osh pics |
--> Zenith-List message posted by: "Jon Croke" <jon@joncroke.com>
We now have Zenith/OshKosh dinner pictures on the front page of
www.CH701.com !!!!
Thanks to Mark (CDNGOOSE) for helping me get a new look and feel for the
home page... look familiar??
Jon
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|