Re: [Repeater-Builder] Strange BNC-like connector
try pasternak he may show this connector. sounds like an HV connector I encountered back years ago. its a fooler if you don't look carefully. mdm Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL --- On Wed, 7/23/08, Bob M. [EMAIL PROTECTED] wrote: From: Bob M. [EMAIL PROTECTED] Subject: [Repeater-Builder] Strange BNC-like connector To: repeater-builder@yahoogroups.com Date: Wednesday, July 23, 2008, 9:14 AM I've got an old piece of HP test equipment that has a very strange BNC connector on the back. Initially it looks just like an ordinary BNC female jack, and an ordinaryh BNC male connector will start to fit it, but... It has THREE little nibs sticking out the sides at 120 degree offsets, instead of the usual two nibs 180 degrees apart. I've not come upon any other connector like it. A regular BNC male will fit inside but the locking ring with two slots won't mate with the three nibs on the outside of the jack. RF Connectors doesn't have anything like it, and I haven't seen one in the Mouser catalog. I could post a photo if it would be helpful. Anyone have a clue? Bob M.
Re: [Repeater-Builder] Strange BNC-like connector
Bob M. wrote: I've got an old piece of HP test equipment that has a very strange BNC connector on the back. Initially it looks just like an ordinary BNC female jack, and an ordinaryh BNC male connector will start to fit it, but... It has THREE little nibs sticking out the sides at 120 degree offsets, instead of the usual two nibs 180 degrees apart. I've not come upon any other connector like it. A regular BNC male will fit inside but the locking ring with two slots won't mate with the three nibs on the outside of the jack. RF Connectors doesn't have anything like it, and I haven't seen one in the Mouser catalog. I could post a photo if it would be helpful. Anyone have a clue? Bob M. Bob, It sounds like a triax connector. The have an additional isolated shield between the center and outer conductors. Take a look here: http://www.amphenolrf.com/products/triax.asp?N=0sid=48867480942E17F; Ed Yoho W6YJ
Re: [Repeater-Builder] Strange BNC-like connector
Yup, that sure looks like it. BNC, single-hole mount, with three bayonet pins instead of the usual two. The rest of it sure resembles an ordinary BNC connector. Thanks. This connector has been bothering me for years. Bob M. == --- On Wed, 7/23/08, Ed Yoho [EMAIL PROTECTED] wrote: From: Ed Yoho [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Strange BNC-like connector To: Repeater-Builder@yahoogroups.com Date: Wednesday, July 23, 2008, 1:37 PM Bob M. wrote: I've got an old piece of HP test equipment that has a very strange BNC connector on the back. Initially it looks just like an ordinary BNC female jack, and an ordinaryh BNC male connector will start to fit it, but... It has THREE little nibs sticking out the sides at 120 degree offsets, instead of the usual two nibs 180 degrees apart. I've not come upon any other connector like it. A regular BNC male will fit inside but the locking ring with two slots won't mate with the three nibs on the outside of the jack. RF Connectors doesn't have anything like it, and I haven't seen one in the Mouser catalog. I could post a photo if it would be helpful. Anyone have a clue? Bob M. Bob, It sounds like a triax connector. The have an additional isolated shield between the center and outer conductors. Take a look here: http://www.amphenolrf.com/products/triax.asp?N=0sid=48867480942E17F; Ed Yoho W6YJ
Re: [Repeater-Builder] Strange BNC-like connector
It is not Triax, I generally refer to this connector as 'Security BNC'. Had one in the junk box and put it on a cable and it then I discovered they were incompatible when I went to put it on the radio. On 7/23/08, Ed Yoho [EMAIL PROTECTED] wrote: Bob M. wrote: I've got an old piece of HP test equipment that has a very strange BNC connector on the back. Initially it looks just like an ordinary BNC female jack, and an ordinaryh BNC male connector will start to fit it, but... It has THREE little nibs sticking out the sides at 120 degree offsets, instead of the usual two nibs 180 degrees apart. I've not come upon any other connector like it. A regular BNC male will fit inside but the locking ring with two slots won't mate with the three nibs on the outside of the jack. RF Connectors doesn't have anything like it, and I haven't seen one in the Mouser catalog. I could post a photo if it would be helpful. Anyone have a clue? Bob M. Bob, It sounds like a triax connector. The have an additional isolated shield between the center and outer conductors. Take a look here: http://www.amphenolrf.com/products/triax.asp?N=0sid=48867480942E17F; Ed Yoho W6YJ Yahoo! Groups Links
Re: [Repeater-Builder] Strange BNC-like connector
DCFluX wrote: It is not Triax, I generally refer to this connector as 'Security BNC'. Had one in the junk box and put it on a cable and it then I discovered they were incompatible when I went to put it on the radio. There are quite a few Agilent / HP (and other mfgs) instruments that use a triax BNC as shown in the referenced Amphenol link. A couple examples are: HP-4140B Picoammeter / Source. HP 4155C Semiconductor Parameter Analyzer http://www.amphenolrf.com/products/triax.asp?N=0sid=48867480942E17F; The triax connectors and cables are used to allow an inner conductor, a guard shield (or floating return), and an outer shield. This is about the only effective way of making accurate fA measurements (especially in a semi noisy lab environment). If you have an instrument with a triax BNC connector on it, and you measure from the outer metal to the inner gold shield, they are not connected as in a 'normal' BNC. Ed Yoho W6YJ (coming up on 40 years in the semiconductor test field - sigh, must be getting old)
Re: [Repeater-Builder] Strange BNC-like connector
I remember those in electronics class at the community college. I think they are a propriatary connector HP used on their equipment. --- On Wed, 7/23/08, Ted Bleiman K9MDM - MDM Radio [EMAIL PROTECTED] wrote: From: Ted Bleiman K9MDM - MDM Radio [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Strange BNC-like connector To: Repeater-Builder@yahoogroups.com Date: Wednesday, July 23, 2008, 7:21 AM try pasternak he may show this connector. sounds like an HV connector I encountered back years ago. its a fooler if you don't look carefully. mdm Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL --- On Wed, 7/23/08, Bob M. [EMAIL PROTECTED] wrote: From: Bob M. [EMAIL PROTECTED] Subject: [Repeater-Builder] Strange BNC-like connector To: repeater-builder@yahoogroups.com Date: Wednesday, July 23, 2008, 9:14 AM I've got an old piece of HP test equipment that has a very strange BNC connector on the back. Initially it looks just like an ordinary BNC female jack, and an ordinaryh BNC male connector will start to fit it, but... It has THREE little nibs sticking out the sides at 120 degree offsets, instead of the usual two nibs 180 degrees apart. I've not come upon any other connector like it. A regular BNC male will fit inside but the locking ring with two slots won't mate with the three nibs on the outside of the jack. RF Connectors doesn't have anything like it, and I haven't seen one in the Mouser catalog. I could post a photo if it would be helpful. Anyone have a clue? Bob M.
Re: [Repeater-Builder] Strange BNC-like connector
When I think triax I think about the big connectors used on TV cameras, that actually use cable with 3 conductors. Basicly a center and 2 shields. I am not sure that these connectors actually accept 3 conductor cable (Triax). On 7/23/08, kd6aaj [EMAIL PROTECTED] wrote:
Re: [Repeater-Builder] Strange BNC-like connector
It does seem that the real triax connector actually has a center pin and two shields, hence tri. Twinax used two center pins. This connector has one center receptacle and one shield connection, just like an ordinary BNC. The only difference I can tell is that there are three pins on the outside bayonet, equally spaced. I replaced it with an ordinary BNC jack, but the mounting hole was smaller, so I had to use some fender washers to install it. Functionally it's fine, but it would have been easier for HP to use an ordinary BNC jack. Bob M. == --- On Wed, 7/23/08, DCFluX [EMAIL PROTECTED] wrote: From: DCFluX [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Strange BNC-like connector To: Repeater-Builder@yahoogroups.com Date: Wednesday, July 23, 2008, 4:21 PM When I think triax I think about the big connectors used on TV cameras, that actually use cable with 3 conductors. Basicly a center and 2 shields. I am not sure that these connectors actually accept 3 conductor cable (Triax).
