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#1
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Marine antenna
B A R R Y writes:
Can we cut a wire VHF-Air antenna that we already own to work with a marine band (higher than VHF-Air) handheld? Yes, but given its proximity to the ground, it's impossible to really tune it correctly. (Hang the aircraft 8 ft up from a crane while looking at the VSWR? No wait! Just flip the bird on its back and....) You'll end up taking a best-guess & living with it... Can we have a local avionics tech simply add a BNC to the right side of the panel to use with the handheld and a BNC-BNC patch cord? Legalities aside, this is trivial. I'll let others fight over the paper issues. You also will want some way to power it, and others have mentioned the headset/noise issues. -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
#2
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Marine antenna
"David Lesher" wrote in message ... B A R R Y writes: Can we cut a wire VHF-Air antenna that we already own to work with a marine band (higher than VHF-Air) handheld? Yes, but given its proximity to the ground, it's impossible to really tune it correctly. (Hang the aircraft 8 ft up from a crane while looking at the VSWR? No wait! Just flip the bird on its back and....) You'll end up taking a best-guess & living with it... Just start out long (20"), put the Thruline in there, go up and TX. Note the direct and reflected power. Land, take out 1/2" and repeat, noting the reflected each time. From this data you can determine the optimal ant. length. -- Hello, my name is Mike, and I am an airplane addict... |
#3
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Marine antenna
Just look at the specs for marine antennaes and use those, or go to a
marine store and measure one. No need to reinvent the wheel.... |
#4
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Marine antenna
"Doug" wrote in message ups.com... Just look at the specs for marine antennaes and use those, or go to a marine store and measure one. No need to reinvent the wheel.... Well, that's true, but the VSWR should be checked, with a meter while airborne. Failure to do this could result in a damaged radio. |
#5
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Marine antenna
Lots of seaplanes are buying handheld marine radios and just plugging
into their aviation antennaes without any problems. The marine hailing frequency (I forget which channel that is), is monitored by allmost all boats up and down the inland passage from Washington to Alaska and if you have trouble this is a good frequency to be on. It is also monitored by the coast guard. The aviation antennae gives better results than the rubber ducky handheld in most planes, I can tell you that. The newer audio panels have music input jacks that you can plug the marine radio into and listen (but not talk) on your aviation headset. Nice setup at low cost. From what I have heard the FCC isn't going to permit an aviation/marine handheld to be manufactured. Just not in the cards from what I have heard as Oshkosh. Of course a built in marine radio into the panel of a seaplane is a nice feature too. I don't know if there is a marine antennae that is specifically made for installation on an airplane or not. Might be interesteing to google around for one. |
#6
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Marine antenna
Doug wrote: From what I have heard the FCC isn't going to permit an aviation/marine handheld to be manufactured. Just not in the cards from what I have heard as Oshkosh. Can't imagine why not. I have the Vertex VXA-700 which is a regular aviation handheld that also includes the 2 meter ham band, which is FM. It also receives the FM broadcast band and the business radio band. |
#7
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Marine antenna
Well, that was what I was told at Oshkosh where EVERYONE was asking for
it. But it's really just a rumor. However, you don't see any of them. Of course the FCC could change their mind. |
#8
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Marine antenna
Doug wrote:
Well, that was what I was told at Oshkosh where EVERYONE was asking for it. But it's really just a rumor. However, you don't see any of them. Of course the FCC could change their mind. I would think it more likely the market to too limited for a company to justify spending the money it would take to get something like that through the FCC certification process. A read through the FCC aviation and marine regs would confirm or deny if there is any regulatory restriction to such a dual radio. -- Jim Pennino Remove .spam.sux to reply. |
#9
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Marine antenna
Those two sections are my bible. I can guarantee you that there is no such
prohibition. HOWEVER, the misinterpretation of the part that prohibits SIMULTANEOUS AM and FM modulation may be causing the confusion. So long as it is AM on the aircraft band and FM on the marine band, there is no prohibition. Jim A read through the FCC aviation and marine regs would confirm or deny if there is any regulatory restriction to such a dual radio. |
#10
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Marine antenna
Doug wrote: Well, that was what I was told at Oshkosh where EVERYONE was asking for it. But it's really just a rumor. However, you don't see any of them. Of course the FCC could change their mind. The FCC doesn't have anything to say about it. |
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