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#1
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I'd like to modify an Arrow OSJ 146/440 to use an N connector instead of
SO239. This would require an N-to-3/8"-24 stud. Allen Lowe hasn't heard of such a thing, which is why he doesn't offer that antenna with an N-connector. Does anyone here know if such a beast exists? What would it take to have some of these custom made? -- David Griffith --- Put my last name where it belongs |
#2
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On Mar 21, 3:35*pm, (David Griffith) wrote:
I'd like to modify an Arrow OSJ 146/440 to use an N connector instead of SO239. *This would require an N-to-3/8"-24 stud. *Allen Lowe hasn't heard of such a thing, which is why he doesn't offer that antenna with an N-connector. *Does anyone here know if such a beast exists? *What would it take to have some of these custom made? -- David Griffith * --- Put my last name where it belongs I'm a bit confused about what, exactly, you want... is it something to go from an N connector "chassis mount" socket's center pin to a 3/8-24 stud? Or some sort of adapter to go between the N series 5/8"-24 thread and a 3/8"-24 thread? A picture would probably be worth lots of words... Cheers, Tom |
#3
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K7ITM wrote:
On Mar 21, 3:35*pm, (David Griffith) wrote: I'd like to modify an Arrow OSJ 146/440 to use an N connector instead of SO239. *This would require an N-to-3/8"-24 stud. *Allen Lowe hasn't heard of such a thing, which is why he doesn't offer that antenna with an N-connector. *Does anyone here know if such a beast exists? *What would it take to have some of these custom made? I'm a bit confused about what, exactly, you want... is it something to go from an N connector "chassis mount" socket's center pin to a 3/8-24 stud? Or some sort of adapter to go between the N series 5/8"-24 thread and a 3/8"-24 thread? A picture would probably be worth lots of words... See Ebay item number 380322578383. This device connects the center conductor of an SO239 to a 3/8"-24 bolt upon which a tall nut is screwed. To use it, you stick it up through a piece of metal (say, a bracket), put an insulating washer on that, add the tall nut, then put a whip adapter in the nut. I want something like that for an N-connector. -- David Griffith --- Put my last name where it belongs |
#4
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On Tue, 22 Mar 2011 08:00:34 +0000, David Griffith rearranged some
electrons to say: K7ITM wrote: On Mar 21, 3:35Â*pm, (David Griffith) wrote: I'd like to modify an Arrow OSJ 146/440 to use an N connector instead of SO239. Â*This would require an N-to-3/8"-24 stud. Â*Allen Lowe hasn't heard of such a thing, which is why he doesn't offer that antenna with an N-connector. Â*Does anyone here know if such a beast exists? Â*What would it take to have some of these custom made? I'm a bit confused about what, exactly, you want... is it something to go from an N connector "chassis mount" socket's center pin to a 3/8-24 stud? Or some sort of adapter to go between the N series 5/8"-24 thread and a 3/8"-24 thread? A picture would probably be worth lots of words... See Ebay item number 380322578383. This device connects the center conductor of an SO239 to a 3/8"-24 bolt upon which a tall nut is screwed. To use it, you stick it up through a piece of metal (say, a bracket), put an insulating washer on that, add the tall nut, then put a whip adapter in the nut. I want something like that for an N-connector. Or just use something like this with the SO-239... http://www.alliedelec.com/search/pro...px?SKU=2020635 |
#5
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On Mar 22, 1:00*am, (David Griffith) wrote:
K7ITM wrote: On Mar 21, 3:35*pm, (David Griffith) wrote: I'd like to modify an Arrow OSJ 146/440 to use an N connector instead of SO239. *This would require an N-to-3/8"-24 stud. *Allen Lowe hasn't heard of such a thing, which is why he doesn't offer that antenna with an N-connector. *Does anyone here know if such a beast exists? *What would it take to have some of these custom made? I'm a bit confused about what, exactly, you want... *is it something to go from an N connector "chassis mount" socket's center pin to a 3/8-24 stud? *Or some sort of adapter to go between the N series 5/8"-24 thread and a 3/8"-24 thread? *A picture would probably be worth lots of words... See Ebay item number 380322578383. *This device connects the center conductor of an SO239 to a 3/8"-24 bolt upon which a tall nut is screwed. *To use it, you stick it up through a piece of metal (say, a bracket), put an insulating washer on that, add the tall nut, then put a whip adapter in the nut. *I want something like that for an N-connector.. * -- David Griffith * --- Put my last name where it belongs Ah, OK...what the ebay picture looks like to me is an UHF socket whose "rear" pin becomes a male 3/8-24, so a 3/8-24 coupling nut ("long nut") can go over it to clamp the insulating washers to the bracket. The problem I see with that is you couldn't just make a simple 3/8-24 stud and solder it to an N center pin, and expect it would hold up very well with the tension on the solder joint. It would be pretty trivial to make on a lathe I'd be happy to do it, but you probably wouldn't like the price for one. They'd be cheap (relatively) if you wanted 10,000 of them. ;-) Then you also need the insulating washers--maybe you get those from the existing antenna? If what I described in the first sentence is what you're looking for, check CB stores for a 3/8-24 to 1/8" whip adapter... Seems like a better mechanical arrangement would be to have the whip attached securely to the mounting bracket, and the N connector also securely attached to the mounting bracket, arranged to there's relatively little strain on the center pin of the N connector... If an SO239 to N adapter works, MPJA has them for about a third the price of Allied... see MPJA # 0522-RC. Cheers, Tom |
#6
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K7ITM wrote:
Seems like a better mechanical arrangement would be to have the whip attached securely to the mounting bracket, and the N connector also securely attached to the mounting bracket, arranged to there's relatively little strain on the center pin of the N connector... What seems to me that would work would be some variation on a U shaped bracket: (pardon the ASCII art) II (antenna) _____________ | IIII | | II |NNN | L-----|NNN M |M |NNN M |M | M |M | | | N is the N connector M is the mounting bolt for the bracket. If the wire is stranded, then there would be little or no stress on the center pin of the N connector. Or if you want the wire out the bottom, II (antenna) _____________ | IIII | II M|M | M|M | | NNNNN _____NNNNN___ NNNNN NNNNN NNNNN 73, Geoff. -- Geoffrey S. Mendelson N3OWJ/4X1GM Those who cannot remember the past are condemned to misquote it. |
#7
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Hey OT:
Exactly what I would do almost. Homebrew my own from a Type N bulkhead chassis mount connector as seen he https://emersonconnectivity.com/OA_M...orBrochure.pdf I'd solder a 3/8-24 by 2 inch SS stud onto the center pin. I'd take a stick of JB weld putty type epoxy and make a form around the N connector and stud Thread on a Hex threaded SS or chrome 3/8-24 coupler Viola' a Type N gumdrop mount. 73 OM de n8zu On Mar 22, 12:29*pm, "Geoffrey S. Mendelson" wrote: K7ITM *wrote: Seems like a better mechanical arrangement would be to have the whip attached securely to the mounting bracket, and the N connector also securely attached to the mounting bracket, arranged to there's relatively little strain on the center pin of the N connector... What seems to me that would work would be some variation on a U shaped bracket: (pardon the ASCII art) * * * * * * * * II (antenna) * * * * * _____________ * * * * * | * *IIII * | * * * * * | * * II * *|NNN * * * * * | * * L-----|NNN * * * * M |M * * * * *|NNN * * * * M |M * * * * *| * * * * M |M * * * * *| * * * * * | * * * * * | N is the N connector M is the mounting bolt for the bracket. If the wire is stranded, then there would be little or no stress on the center pin of the N connector. Or if you want the wire out the bottom, * * * * * * * * II (antenna) * * * * * _____________ * * * * * | * *IIII * * * * * * | * * II * * * * * * *M|M * *| * * * * *M|M * *| * * * * * | * *NNNNN * * * * * _____NNNNN___ * * * * * * * *NNNNN * * * * * * * *NNNNN * * * * * * * *NNNNN 73, Geoff. -- Geoffrey S. Mendelson N3OWJ/4X1GM Those who cannot remember the past are condemned to misquote it. |
#8
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raypsi wrote:
Hey OT: Exactly what I would do almost. Homebrew my own from a Type N bulkhead chassis mount connector as seen he https://emersonconnectivity.com/OA_M...orBrochure.pdf I'd solder a 3/8-24 by 2 inch SS stud onto the center pin. I'd take a stick of JB weld putty type epoxy and make a form around the N connector and stud Thread on a Hex threaded SS or chrome 3/8-24 coupler Viola' a Type N gumdrop mount. I'm a bit concerned as to how strong such an arrangement would be. -- David Griffith --- Put my last name where it belongs |
#9
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On Mar 24, 1:17*pm, (David Griffith) wrote:
raypsi wrote: Hey OT: Exactly what I would do almost. Homebrew my own from a Type N bulkhead chassis mount connector as seen he https://emersonconnectivity.com/OA_M...onnectorBrochu... I'd solder a 3/8-24 by 2 inch SS stud onto the center pin. I'd take a stick of JB weld putty type epoxy and make a form around the N connector and stud Thread on a Hex threaded SS or chrome 3/8-24 coupler Viola' a Type N gumdrop mount. I'm a bit concerned as to how strong such an arrangement would be. -- David Griffith * --- Put my last name where it belongs hey OT: A 5/8 wave whip is sum like 57 inches in fiberglass, a gum drop mount is pretty supstantial, my gum drop mount is like 3 inches in diameter at the base, I used a uni multi step drill bit to cut the 3/4 inch hole in the trunk of my Taurus. My whip was a 11 meter 1/4 wave fiberglass whip I cut down to get 5/8 wave on 2 meters, and because it's fiberglass makes it broadbanded from 144 to 148 Mhz like 1.2-1.1/1 across the band 73 OT de n8zu |
#10
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raypsi wrote:
On Mar 24, 1:17*pm, (David Griffith) wrote: raypsi wrote: Hey OT: Exactly what I would do almost. Homebrew my own from a Type N bulkhead chassis mount connector as seen he https://emersonconnectivity.com/OA_M...onnectorBrochu.... I'd solder a 3/8-24 by 2 inch SS stud onto the center pin. I'd take a stick of JB weld putty type epoxy and make a form around the N connector and stud Thread on a Hex threaded SS or chrome 3/8-24 coupler Viola' a Type N gumdrop mount. I'm a bit concerned as to how strong such an arrangement would be. hey OT: A 5/8 wave whip is sum like 57 inches in fiberglass, a gum drop mount is pretty supstantial, my gum drop mount is like 3 inches in diameter at the base, I used a uni multi step drill bit to cut the 3/4 inch hole in the trunk of my Taurus. My whip was a 11 meter 1/4 wave fiberglass whip I cut down to get 5/8 wave on 2 meters, and because it's fiberglass makes it broadbanded from 144 to 148 Mhz like 1.2-1.1/1 across the band There isn't quite that much room on the base of an Arrow J-pole. I'm wondering how much loss there would be if I simply add an SO239-to-N converter and solder the threads together. -- David Griffith --- Put my last name where it belongs |