Transponder Ant. was Re: REFLECTOR:anntenas

[Fred Marconi]

Scott:

I believe that when I looked at the information in Bob Knuckoll's manual
this is what he suggested I went a little larger since I had the space.  I
placed my antenna between the main gear bulkhead and the transverse piece
that hold the bellcrank assembly for the ailerons.  Plenty of room there.

Fred

www.aeroelectric.com


----- Original Message -----
From: "Scott Derrick" <scott@tnstaafl.net>
To: <reflector@tvbf.org>
Sent: Friday, April 11, 2003 9:37 AM
Subject: Re: Transponder Ant. was Re: REFLECTOR:anntenas


> Really that big?
>
> I think the one in the strake is 3x3
>
> Scott
>
> Fred Marconi wrote:
> > 9" X 9" WOULD DO NICELY.
> >
> > FRED
> > ----- Original Message -----
> > From: "Scott Derrick" <scott@tnstaafl.net>
> > To: <reflector@tvbf.org>
> > Sent: Friday, April 11, 2003 9:12 AM
> > Subject: Transponder Ant. was Re: REFLECTOR:anntenas
> >
> >
> >
> >>I'll second Wayne's "DO NOT" for the transponder. Mine is in the strake
> >>in the outside wing bolt hole space.  I get periodic complaints from ATC
> >>about intermittent transponder.  I think I'll purchase another antenna
> >>and try mounting one closer to the transmitter.
> >>
> >>I don't want it out side though, don't have any external antennas now,
> >>and don't want any.
> >>
> >>Where's a good spot in a standard RG?  I was thinking about mounting it
> >>to the bottom of the rear seat?
> >>
> >>How big does the ground plane need to be?
> >>
> >>My GPS antenna is mounted to the inside of the nose access door, 4 feet
> >>of cable and works great.
> >>
> >>Scott
> >>
> >>Wayne Lanza wrote:
> >>
> >>>
> >>>Regarding the antennas, our experience at the builders center points to
> >>>the following:
> >>> > Transponder ANT = between the firewall and gear bulk head, on center
> >>>line. DO NOT
> >>>put this ANT out in the strake, many transponders don't like to drive
> >>>this much wire!
> >>> > GPS = on top of the landing light or on top of the canard, keep this
> >>>wire under 8' long.
> >>> > Marker Beacon = Inside or outside of the keel, or on the floor near
> >>>the keel. Locate
> >>>the foil such that you don't tear it up when upholstering or mounting
> >>>the seats...
> >>> > Glide Slope = On the floor under the copilot front seat area.
> >>> > AM/FM = Not too critical, string a 23" piece of the ANT wire (center
> >>>conductor only)
> >>>across the under side of the structure in front of the canopy. Make
sure
> >>>that the pitch
> >>>trim spring doesn't interfere.
> >>> > ELT = Mount the ELT to the floor between the gear bulk head and the
> >>>keel bulk head
> >>>on the copilot side. Run two 23" foils on a diagonal centered at the
> >>>fuselage joint, the
> >>>angle of the foils is such that they are fairly straight (they might
> >>>wrap onto the ceiling).
> >>>This is not super critical, but this antenna should be vertically
> >>>mounted not horizontal!
> >>>Use the torroids and connect the coax braid to the lower foil. Secure
> >>>foils, torroids and
> >>>the end of the lead in coax with 1 ply of bid. This needs to be
> >>>shock/impact secured.
> >>> > ADF = I've heard of them :-)
> >>>
> >>>In general, use the correct type of coax (not TV wire or solid center
> >>>conductor), use the
> >>>proper BNC terminals and appropriate tools. Keep the coax runs short
and
> >>>secure.
> >>>
> >>>Fly Safe,
> >>>Wayne Lanza
> >>>Composite Design, Inc.
> >>>(electrical weenie at the Velocity Builder's Center)
> >>>____________________________________________________________________
> >>>On Friday, April 11, 2003, at 06:37 AM, Lynn Gallup wrote:
> >>>
> >>>    Noel,
> >>>    As near as possible, I followed the suggestions in the Velocity
> >>>    manual. After 185 hours flying my airplane in a wide variety of
> >>>    circumstances I can pronounce perfect operation of my nav & com
> >>>    radios, localizer & glideslope, marker beacon receiver and
> >>>    transponder. Even the ADF works acceptably although its range is a
> >>>    little short. The GPS would benefit from shielding or a slight
> >>>    relocation as it will blank out if one of the nav receivers is
tuned
> >>>    to a particular VOR frequency. (Leakage of nav's IF frequency
signal
> >>>    out of the localizer antenna overcomes the satellite signals.)
> >>>
> >>>    Mine is a hatch door, long wing, RG. The antenna locations are:
> >>>
> >>>    Com antennas - In the tip sails.
> >>>    Nav antenna - One shared antenna on top of fuselage about four
> >>>    inches forward of engine bulkhead.
> >>>    Marker beacon antenna - Along right side about two inches below
> >>>    windows.
> >>>    Transponder antenna - Bottom of fuselage below right rear seat.
> >>>    ADF antennna - Bottom of fuselage below left rear seat.
> >>>    Localizer antenna - On canard top surface, center-line of fuselage.
> >>>    GPS antenna - Front of canard top, centered. Forward of localizer
> >>>    antenna. It should be remounted under the top of the fuselage above
> >>>    the localizer antenna.
> >>>
> >>>    Regards,
> >>>    Lynn
> >>>    =====================
> >>>    At 11:46 PM 4/10/2003 Thursday, you wrote:
> >>>
> >>>
> >>>    Now that it's finally starting to warm up, I'm doing the planning
> >>>    for my summer project... The wings / canard.
> >>>    I realize that antenna placement is variable, But...
> >>>    What do I really need? Do I need a Com and Nav in each wing?
> >>>    Where's the best place for a glideslope antenna. The keel was
> >>>    already down when I got the kit.
> >>>    I assume the transponder would be best on the floor, and the gps on
> >>>    the ceiling.
> >>>    What about something for the am/fm?
> >>>    I've seen Don's elt antenna on the main wingspar shearweb, and it
> >>>    looked pretty survivable.
> >>>
> >>>    What's popular / what's practical
> >>>
> >>>    Noel 3suv103
> >>>
> >>>
> >>
> >>
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