Home |
Search |
Today's Posts |
#11
|
|||
|
|||
Hi Dick
I have a Marinetek Waypointer Loran C that is missing the antenna. If any of the electronic experts that have replied to you can tell us if they will match up I would like to have it. That experts remark is not sarcasm guys, just amazement. JR Gilbreath R.W. Behan wrote: Hey, "Me," I don't want to sell it. Happy to pass it along to anyone who can use it. (Well, maybe I'd hold out for shipping costs.) Spirit of recycling, that sort of thing, eh? Cheers, Dick "Me" wrote in message ... In article , Brian Whatcott wrote: On Sat, 29 Jan 2005 12:51:59 -0800, "R.W. Behan" wrote: Help, help, you electronic wizards out there. We've removed the Loran C from a 20-year-old Lord Nelson Tug we bought recently, but up on the pilothouse is a perfectly good Loran C antenna, with the antenna lead running to the nav station. Can this antenna be used for anything else? Specifically, for a GPS?, or maybe a VHF radio? Well, maybe a flagstaff..... Any thoughts or advice will be appreciated. TIA. Dick B. LNVT "Annie" LORAN antennas come in two flavors - a whip or a long wire. These low frequency signals at 200kHz often went through 'couplers' then a coax to a loran connector. The copuler is often in demand, because lorans tends to be sold without them. If the antenna is a whip, it may be rather long for a VHF antenna which is about 20 inches for a 150MHz 1/4 wave. A CB antenna is about 60 inches for a 1/4 wave at 50 MHz. A wire antenna can be useful for HF communications. - the longer the better. Brian Whatcott Altus OK Bzzzt, Nice try, would you like to try again, for what is behind Door #1? Locan C is at 100Khz. The Antenna Coupler is the big thing at the base of the antenna, and it is an "ACTIVE Device", which means that it has an amplifier and very narrow filtering inside, and is powered by the receiver up the coax. The whip that is screwed into the top of the coupler, in most cases will be 102" long, which is 1/4 wavelength at 27 Mhz (CB Band). In all likelyhood the whip is a Shakespear 10-4 and caould be used for CB, when mounted on a standard CB Base attachment designed for a 10-4 antenna. Loran antenna couples are usually "Device Specific" so you would need to know what Mfg and Model it came from, in order to have any chance of selling it used. That said, there is certainly a used market for them. Me |
#12
|
|||
|
|||
JR, you're more than welcome to the antenna if it will work for you. Hope
we can get some help from these gentlemen--experts, indeed. Dick "JR Gilbreath" wrote in message ... Hi Dick I have a Marinetek Waypointer Loran C that is missing the antenna. If any of the electronic experts that have replied to you can tell us if they will match up I would like to have it. That experts remark is not sarcasm guys, just amazement. JR Gilbreath R.W. Behan wrote: Hey, "Me," I don't want to sell it. Happy to pass it along to anyone who can use it. (Well, maybe I'd hold out for shipping costs.) Spirit of recycling, that sort of thing, eh? Cheers, Dick "Me" wrote in message ... In article , Brian Whatcott wrote: On Sat, 29 Jan 2005 12:51:59 -0800, "R.W. Behan" wrote: Help, help, you electronic wizards out there. We've removed the Loran C from a 20-year-old Lord Nelson Tug we bought recently, but up on the pilothouse is a perfectly good Loran C antenna, with the antenna lead running to the nav station. Can this antenna be used for anything else? Specifically, for a GPS?, or maybe a VHF radio? Well, maybe a flagstaff..... Any thoughts or advice will be appreciated. TIA. Dick B. LNVT "Annie" LORAN antennas come in two flavors - a whip or a long wire. These low frequency signals at 200kHz often went through 'couplers' then a coax to a loran connector. The copuler is often in demand, because lorans tends to be sold without them. If the antenna is a whip, it may be rather long for a VHF antenna which is about 20 inches for a 150MHz 1/4 wave. A CB antenna is about 60 inches for a 1/4 wave at 50 MHz. A wire antenna can be useful for HF communications. - the longer the better. Brian Whatcott Altus OK Bzzzt, Nice try, would you like to try again, for what is behind Door #1? Locan C is at 100Khz. The Antenna Coupler is the big thing at the base of the antenna, and it is an "ACTIVE Device", which means that it has an amplifier and very narrow filtering inside, and is powered by the receiver up the coax. The whip that is screwed into the top of the coupler, in most cases will be 102" long, which is 1/4 wavelength at 27 Mhz (CB Band). In all likelyhood the whip is a Shakespear 10-4 and caould be used for CB, when mounted on a standard CB Base attachment designed for a 10-4 antenna. Loran antenna couples are usually "Device Specific" so you would need to know what Mfg and Model it came from, in order to have any chance of selling it used. That said, there is certainly a used market for them. Me |
#13
|
|||
|
|||
"Jim Donohue" wrote in
news:vJwLd.740$Tt.247@fed1read05: Nope..Almost certainly an active preamp. Not a loading coil. See Me comment. Jim Probably both....at 100Khz, Loran C's freq, a 1/4 wavelength whip is 2,460' high....Probably wouldn't survive going under those big powerlines...(c; |
#14
|
|||
|
|||
JR Gilbreath wrote in
: Hi Dick I have a Marinetek Waypointer Loran C that is missing the antenna. If any of the electronic experts that have replied to you can tell us if they will match up I would like to have it. That experts remark is not sarcasm guys, just amazement. JR Gilbreath Sorry, JR. In our proprietary marine electronics world, nothing is standardized but NMEA's dataport. Even that is suspect most of the time. Nobody's proprietary antenna, like this one, plugs into anyone else's proprietary antenna connector to keep the customer loyal to the brand, the only place he can come for a replacement antenna/coupler/preamp. Note - GPS units are all exactly made this way for the same exact reasons....Don't ever plug a Garmin antenna into a Lowrance GPS, etc. |
#15
|
|||
|
|||
Nope...does not compute. A loading coil of a sort might be a component on a
preamp board. But a preamp board is never a component on a loading coil. If some version of a balun or loading coil is present it will be narrow tuned and unsuited for use at other than the LORAN frequency. And you know better. Don't play technical one up for the hell of it. Jim "Larry W4CSC" wrote in message ... "Jim Donohue" wrote in news:vJwLd.740$Tt.247@fed1read05: Nope..Almost certainly an active preamp. Not a loading coil. See Me comment. Jim Probably both....at 100Khz, Loran C's freq, a 1/4 wavelength whip is 2,460' high....Probably wouldn't survive going under those big powerlines...(c; |
#16
|
|||
|
|||
Well, rats, JR.
FWIW, my Loran C unit is a Ratheon Raynav 550, and I still have the business end, the display and control unit I removed from the nav station. Same deal holds for the whole outfit: anyone who can use it can have it. Cheers, smooth sailing. Dick B. "Larry W4CSC" wrote in message ... JR Gilbreath wrote in : Hi Dick I have a Marinetek Waypointer Loran C that is missing the antenna. If any of the electronic experts that have replied to you can tell us if they will match up I would like to have it. That experts remark is not sarcasm guys, just amazement. JR Gilbreath Sorry, JR. In our proprietary marine electronics world, nothing is standardized but NMEA's dataport. Even that is suspect most of the time. Nobody's proprietary antenna, like this one, plugs into anyone else's proprietary antenna connector to keep the customer loyal to the brand, the only place he can come for a replacement antenna/coupler/preamp. Note - GPS units are all exactly made this way for the same exact reasons....Don't ever plug a Garmin antenna into a Lowrance GPS, etc. |
#17
|
|||
|
|||
eBay still shows a steady stream of Lorans for sale - often without
couplers. Put it there Brian On Sun, 30 Jan 2005 23:18:29 -0800, "R.W. Behan" wrote: Thanks, Brian-- It's a whip, with a cylindrical fixture at the base about 1-2 inches in diameter and maybe 1 foot high. Is this a "coupler?" If so, I'd be happy to put it in anyone's hands who could use it. Do you know of anyone? Cheers, Dick B. "Brian Whatcott" wrote in message .. . On Sat, 29 Jan 2005 12:51:59 -0800, "R.W. Behan" wrote: Help, help, you electronic wizards out there. We've removed the Loran C from a 20-year-old Lord Nelson Tug we bought recently, but up on the pilothouse is a perfectly good Loran C antenna, with the antenna lead running to the nav station. Can this antenna be used for anything else? Specifically, for a GPS?, or maybe a VHF radio? Well, maybe a flagstaff..... Any thoughts or advice will be appreciated. TIA. Dick B. LNVT "Annie" LORAN antennas come in two flavors - a whip or a long wire. These low frequency signals at 200kHz often went through 'couplers' then a coax to a loran connector. The copuler is often in demand, because lorans tends to be sold without them. If the antenna is a whip, it may be rather long for a VHF antenna which is about 20 inches for a 150MHz 1/4 wave. A CB antenna is about 60 inches for a 1/4 wave at 50 MHz. A wire antenna can be useful for HF communications. - the longer the better. Brian Whatcott Altus OK |
#18
|
|||
|
|||
Hi Dick
I cannot tell you how disappointed I am. I was looking forward to trading my Satnav for it. Oh well, I will just have two holes in my instrument panel to fill. Cheers JR R.W. Behan wrote: Well, rats, JR. FWIW, my Loran C unit is a Ratheon Raynav 550, and I still have the business end, the display and control unit I removed from the nav station. Same deal holds for the whole outfit: anyone who can use it can have it. Cheers, smooth sailing. Dick B. "Larry W4CSC" wrote in message ... JR Gilbreath wrote in : Hi Dick I have a Marinetek Waypointer Loran C that is missing the antenna. If any of the electronic experts that have replied to you can tell us if they will match up I would like to have it. That experts remark is not sarcasm guys, just amazement. JR Gilbreath Sorry, JR. In our proprietary marine electronics world, nothing is standardized but NMEA's dataport. Even that is suspect most of the time. Nobody's proprietary antenna, like this one, plugs into anyone else's proprietary antenna connector to keep the customer loyal to the brand, the only place he can come for a replacement antenna/coupler/preamp. Note - GPS units are all exactly made this way for the same exact reasons....Don't ever plug a Garmin antenna into a Lowrance GPS, etc. |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
SSB Antenna for a Ketch | Electronics | |||
SSB Antenna connection | Electronics | |||
Notes on short SSB antennas, for Larry | Cruising | |||
Icom 802 troubleshooting | Electronics |