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HP 85046 S-parameter Test set: Port A & Port B connectors availability

gren All Messages By This Member #97654 hi, HP 85046 S-parameter Test Set arrived without the external Port A & PortB connectors. Does anyone have a spare set of these connectors , (or have some mechanical description of how to make them) ?? thank you, rick
bownes Member Profile All Messages By This Member #97655 开云体育 Are the couplers there? Even if the couplers are there, you may be out of luck. I seem to recall that they are bonded to the substrate or soldered directly to the smallest coax I have ever seen.? Bob toggle quoted message Show quoted text On Jul 10, 2019, at 16:24, garp6 <hrgerson@...> wrote: hi, HP 85046 S-parameter Test Set arrived without the external Port A & PortB connectors. Does anyone have a spare set of these connectors , (or have some mechanical description of how to make them) ?? thank you, rick
peter bunge All Messages By This Member #97658 Is it an A or B? The HP85046B is a 75 ohm version. The connectors are not standard nor easy to replace. Maybe someone had thoughts of converting a 75 ohm to 50 ohm - good luck with that. You are faced with connecting to a saphire substrate. The spec of fly poop in the picture below is one of the 50 ohm terminating resistors. If they are blown you have even bigger problems. This is one item you want complete and working. Sorry for the bad news. toggle quoted message Show quoted text On Wed, Jul 10, 2019 at 4:24 PM garp6 <hrgerson@...> wrote: hi, HP 85046 S-parameter Test Set arrived without the external Port A & PortB connectors. Does anyone have a spare set of these connectors , (or have some mechanical description of how to make them) ?? thank you, rick
Dr. David Kirkby from Kirkby Microwave Ltd #97659 On Wed, 10 Jul 2019 at 22:39, peter bunge <bunge.pjp@...> wrote: Is it an A or B? The HP85046B is a 75 ohm version. The connectors are not standard nor easy to replace. Maybe someone had thoughts of converting a 75 ohm to 50 ohm - good luck with that. Note the A, B, R and RF in on a 75 ohm 85046B test set are all 50 ohm. It is only the test ports, which are 50 or 75 ohm. I did actually convert a 75 ohm 85046B to 50 ohm by replacing the bridges from a 50 ohm 8503A 1.3 GHz test set. This site gave me the idea At the time, the combined cost of the 1.3 GHz test set plus a 75 ohm 85046B test set, were much cheaper than an 85046A 50 ohm test set. Since I have a 20 GHz microwave VNA, I was not bothered about limiting the performance to 1.3 GHz. In fact, the 1.3 GHz bridges actually meet the spec of the 85046A to 2 GHz, and is quite usable at 3 GHz. If the A and B ports of an S-parameter test set are missing, then its really anyone's guesses what has been done to it. Obviously, someone has picked it apart for some reason - perhaps would of the bridges are blown up, and it became a parts doner. Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom. Registered in England and Wales as company number 08914892 Tel 01621-680100 / +44 1621-680100
gren All Messages By This Member #97663 Clarification: My unit is an HP 85046a with OPT 1 BP (whatever that is ?). The external Port 1 & Port 2 connectors are missing. One can peer down into the threaded Port hole and see, deeper inside, a gold pin that would appear to be an internal connector pin. The unit is sealed at the back with Agilent stickers over the screws of the unit covers.? So, the unit seems intact, except that the Port 1 & 2 connectors have been unscrewed from the front. IMG_0479.JPG IMG_0486.JPG IMG_0473.JPG

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