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currydon(at)bellsouth.net
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 Posted: Fri Feb 15, 2008 5:39 am Post subject: Loran Antenna |
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Many believe Loran is dead technology, but I'm not one of them. Old, yes;
stale, yes; but dead, no! In fact, I'm including a KLN-88 in a panel
project on a Tiger. Which brings me to my question. I have room in my
wingtips for the KA-84 antenna, but I'm concerned about reception. Is
"ground plane" an issue with Loran? If so, would the wingtip location
provide sufficient ground plane? Are there any other reasons to NOT
consider the wingtips as a location for the antenna? Also, while I don't
currently have strobe lights in my wingtips, I would like to retain the
option of installing them in the future. Since I'm certain that strobe
lights would interfere with Loran reception, is there some type of shielding
that I could install along with the strobes to prevent the interference?
Don
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Fri Feb 15, 2008 6:34 am Post subject: Loran Antenna |
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I don't know for certain, but given that it operates down in the
frequency spectrum with/below ADF, I suspect ground plane is useful. I
know my Northstar M1 has a setup question for whether the antenna is on
top or bottom of fuselage, so orientation apparently matters.
As I recall, Whelan has a spec for how far power supply and strobes
should be from loran and other antennas.
Don Curry wrote:
| Quote: |
Many believe Loran is dead technology, but I'm not one of them. Old, yes;
stale, yes; but dead, no! In fact, I'm including a KLN-88 in a panel
project on a Tiger. Which brings me to my question. I have room in my
wingtips for the KA-84 antenna, but I'm concerned about reception. Is
"ground plane" an issue with Loran? If so, would the wingtip location
provide sufficient ground plane? Are there any other reasons to NOT
consider the wingtips as a location for the antenna? Also, while I don't
currently have strobe lights in my wingtips, I would like to retain the
option of installing them in the future. Since I'm certain that strobe
lights would interfere with Loran reception, is there some type of shielding
that I could install along with the strobes to prevent the interference?
Don
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Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Fri Feb 15, 2008 5:41 pm Post subject: Loran Antenna |
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I had to look it up (must be getting old) one of the North Atlantic chain
stations is about three gunshots down the road form this location and i have
had the full tour of the site. However I digress... This is the dope on
Loran C. It operates on a band between 90kHz and 110kHz MW same as your
ADF. This means you can use the sense antenna for your ADF when run
through a splitter to operate your Loran C properly. This is a receive
antenna and is not so particular about the presence of a ground plane as an
MW broadcast antenna would be. Be careful it will not work with the
gogniometer (loop antenna) for your ADF so make sure you hook it up through
a splitter or directly (if you are pulling the ADF) to the long wire sense
antenna.
Noel
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Noel Loveys
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