Today's Message Index:
----------------------
1. 12:40 PM - Re: transponder question (Neville Kilford)
2. 03:10 PM - Handburn on antenna : fact or mythology ? (Gilles.Thesee)
3. 04:32 PM - Re: Handburn on antenna : fact or mythology ? (Tom Brusehaver)
4. 07:14 PM - Re: Handburn on antenna : fact or mythology ? (James E. Clark)
5. 08:32 PM - Re: Re: Microair Radio-Xpdr Wire Harness (Rick Fogerson)
Message 1
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| Subject: | Re: transponder question |
--> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org>
Troy,
No reason why that shouldn't work, just as long as the transponder antenna can
make contact with the aluminium sheet. I've not even the first clue about fibreglassing
mind you (mine being a wood plane).
I had similar thoughts about putting the transponder antenna on an aluminium access
panel underneath the fuselage. I decided against it, preferring to keep
the outside of the plane as clean as possible. Also, I would rather an access
panel was just that, and could be removed without pulling on the wires, etc.
(despite there being an easily-undoable BNC connector). Finally, I'd rather the
transponder cable leading up to the aerial would be fixed too, so that it won't
flex, and perhaps fracture, in the long term.
Perhaps this is overly cautious, but I'd rather leave as little to chance as possible.
In the end I just put a little upside-down L-shaped bracket in the fuselage
(fixed to one of the uprights that joins the top and bottom longerons),
which holds the transponder aerial and ground plane in the correct attitude.
Hope this helps.
Nev
ps. I've sent this reply via the list.
----- Original Message -----
From: Troy Scott
To: nkilford@etravel.org
Sent: Saturday, May 31, 2003 5:03 PM
Subject: transponder question
Thanks for your response on the Aeroelectric Forum. I need to use the full size
7" access plate for the aileron bellcrank. However, it occurred to me that
I could switch to a 7" fiberglass plate with a correctly sized (5.3"? )thin
sheet of aluminum bonded to the inside of it. This would serve as the ground
plane and still allow me to mount the antenna where I'd planned. Thoughts?
Regards,
Troy Scott
Message 2
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| Subject: | Handburn on antenna : fact or mythology ? |
--> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
Hi Bob and all,
Here is a question that has kept bothering me for several weeks :
A month ago I witnessed the electrician in an FBO advise his co-wokers never
to touch a comm antenna during transmission. He said he did once and got a
handburn.
Question : How hot can an antenna get ? Was he telling the truth, or was he
just reporting another hangar tale ? What is the physics behind the story ?
Thank you for any feedback or explanation
Regards
Gilles
Message 3
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| Subject: | Re: Handburn on antenna : fact or mythology ? |
--> AeroElectric-List message posted by: Tom Brusehaver <cozytom@mn.rr.com>
It doesn't really get hot, but there is a bunch
of energy there. (5-25W). You could get and RF
burn, which isn't the same as grabbing the wrong
end of a soldering iron.
When I first got my ham license, I got a Swan 250
I think, and the first time I tuned it up (I didn't
know what I was doing), I got zapped pretty good.
burned the tiniest hole through the tip of my finger.
Gilles.Thesee wrote:
> --> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
>
> Hi Bob and all,
>
> Here is a question that has kept bothering me for several weeks :
> A month ago I witnessed the electrician in an FBO advise his co-wokers never
> to touch a comm antenna during transmission. He said he did once and got a
> handburn.
>
> Question : How hot can an antenna get ? Was he telling the truth, or was he
> just reporting another hangar tale ? What is the physics behind the story ?
>
> Thank you for any feedback or explanation
> Regards
>
> Gilles
Message 4
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| Subject: | Handburn on antenna : fact or mythology ? |
--> AeroElectric-List message posted by: "James E. Clark" <james@nextupventures.com>
I have been burned by the RF from a ham radio.
Touching one of those antennas during a transmission is NOT a "cool" thing
to do.
What happens is that you do NOT kow you are being burned until it is way too
late. It is like the RF is boiling the blood inside your finger and you
don't notice until it reaches the boiling point. Once I let go of the
antenna (it was on a roof and someone transmitted when I did not expect such
to occur) that is when it really burned for a while.
I don't know how much energy was transmitted into my fingers but I do know
it was enough. It is probably kinda like you don't want to be inside a
microwave oven while it is on. It won't get hot but your insides REALLY
will.
James
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of
> Gilles.Thesee
> Sent: Saturday, May 31, 2003 6:04 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Handburn on antenna : fact or mythology ?
>
>
> --> AeroElectric-List message posted by: "Gilles.Thesee"
> <Gilles.Thesee@ac-grenoble.fr>
>
> Hi Bob and all,
>
> Here is a question that has kept bothering me for several weeks :
> A month ago I witnessed the electrician in an FBO advise his
> co-wokers never
> to touch a comm antenna during transmission. He said he did once and got a
> handburn.
>
> Question : How hot can an antenna get ? Was he telling the truth,
> or was he
> just reporting another hangar tale ? What is the physics behind
> the story ?
>
> Thank you for any feedback or explanation
> Regards
>
> Gilles
>
>
Message 5
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| Subject: | Re: Microair Radio-Xpdr Wire Harness |
--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
do not archive
That number would be fine Bob.
Thanks, Rick
>
> I can ship tomorrow morning. I have the following
> data from your last order:
>
> Rick Fogerson
> 7558 W. Hathaway Ct
> Boise, ID 83703
> Country: USA
> Phone: 208-853-0436
> Email: rickf@cableone.net
>
> The visa you used ended in -0629 . . . do
> you want to use this same card?
>
> VISA/Mastercard: xxxx-xxxx-xxxx-0629
> Expiry: 07/04
>
> Bob . . .
>
>
>
>
>
>
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