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LeCroy Probus reverse engineering
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ollopa:
There are a few panel-mount push-on male BNC connectors out there. 

https://www.aliexpress.com/item/RF-electrical-terminal-connector-BNC-Plug-panel-mount-Quick-Push-on-bulkhead-with-Solder-cup-connector/32443473110.html

https://www.aliexpress.com/item/5PCS-BNC-Panel-Mount-Plug-Quick-Push-on-with-Nut-and-Solder-Cup/32704864505.html

Obviously PCB mount would be preferred so I'm looking forward to hearing back from wingel.
Mechatrommer:
yes i saw that deck mount quick bnc type connector sold in ebay, the price is a bit high for a china brand. and its less neater than the original, the ground connector is "loose" type i'm not sure it will be impedance controlled. that will be the last option.
wingel:
> for non EU members, can you share the source?

sure, I just wanted to check with the supplier that i was allowed to post their product drawing in a public forum.

I found an edge mounted BNC connector from a Chinese company called "Eastron" (eastron.cn) on Alibaba:

https://www.alibaba.com/product-detail/RF-50ohms-ST-180-degree-edge_60634004992.html

When I contacted them it turns out that they also have a "push-on" variant of the connector without the coupling nut as in the attached picture.  Not too hard for them to do such a variant I guess, since all they have to do is to build a batch of the normal connector and not mount the coupling nut. And they are willing to sell just a handful of them since they still have a few in stock.

The Alibaba page shows a picture of a vector network analzyer (looks like a HP 8753E which goes up to 3GHz or 6GHz depending on options) so they should be able to check the impedance matching of the connectors they manufacture.  I'm hopeful that the connector will be of decent quality.

Please don't buy up all of their stocks though, I want to buy some first. :)
wingel:
(Updated.  Darn, I can't spell when I have just woken up and should be on my way to work.)

Finding a decent pin header turns out to be much harder.   I haven't found any supplier with any angled connector with 0.03" pins.

If one could just find a straight pin with the proper rounded end and surface finish (a couple of micrometers of gold on nickel) one could probably 3D-print or mill a plastic support to put the pins in.  And then build something like the attached picture with a bulk-head push-on-BNC to SMA adapter that one can find on eBay for a few dollars.

Build a small PCB like that with an I2C EEPROM on it and you'd have something that fits nicely in the LeCroy scope with no risk of inserting the pin header in the wrong direction.

Do you know any decent manufacturer that have an automatic lathe who could manufacture a run of a hunded pins or so and then plate them with nickel and gold?  It shouldn't be that hard to do, I just have no idea where to find a manufacturer who can do it for a decent price.
Mechatrommer:

--- Quote from: wingel on March 11, 2019, 07:08:28 am ---Please don't buy up all of their stocks though, I want to buy some first. :)

--- End quote ---
dont worry, alibaba is a bit inconvenient for me (not sure how to make order (and paypal payment possible?) and look at seller rating) and i'm not in great need, otherwise we still have alternative the china nutted version above. if you want you can buy all and post in ebay for non-EU member as well. the alibaba link you provided has the outer rotating/lock ring, lecroy doesnt. but i'm thinking we can improvise that by removing the outer ring using brute force or something hard. i thought i've linked earlier the pcb side mount of a BNC connector with lock ring. i measure it about 15.5mm tip to pcb edge. i have this a few in stock.


--- Quote from: wingel on March 08, 2019, 08:27:13 pm ---One more thing.  Could someone who has a LeCroy probe measure the pin header and post the exact dimensions.  I'm trying to find a supplier who can manufacture the connectors just to see how much it would cost, and it would be nice to be able to give them some drawings of the part.

--- End quote ---
not entirely sure what you want, but measuring with my rusty caliper on AP020, the internal of protruding rectangular plastic protecting/guiding the pins is 6.7 W x 5.3 H x 5 D (mm) the pin diameter is about 0.76mm type, the mill-max also have 0.46mm diameter pins like what i bought from china no brand ebay here, which is too loose and not suitable. the linked pogo spring loaded in 1.07mm dia i dont think that will fit. i browsed mill-max catalog i cant find 2mm pitch headers with 0.76mm pin diameter, 0.76mm pin only available in 2.54mm pitch format, so maybe need to improvise again ::)
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