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| Banggood 50 ohm BNC feed-through terminator - a quick review |
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| bjcuizon:
That's pretty neat though. What are the sizes/wattage of the resistors? I also wonder why tek/hp feedthru terminators can cost much. Are we paying for the name brand it has? Or does it have really really high quality parts used? |
| TheSteve:
They look to be 1206 resistors. I resoldered the resistors on the bad one and it is 49.75 ohms now. I am not convinced it will keep working though. While the resistors didn't fall off I can't help but think there is a crack in one of them. The name brand ones are overpriced but I would think the internal construction is probably a decent amount nicer. I doubt they have hand soldered smt resistors going to the center conductor. Right now any stress on the center conductor can break the resistors. |
| BravoV:
Steve, if you decided to fix it with the resistors like the ones you put in your home brew load as you mentioned above, please update us. |
| lukier:
Thanks for testing. I just got 4 of these (I guess the same) few days ago: https://www.aliexpress.com/item/P7001-2PCS-High-quality-BNC-to-BNC-Female-seat-50KY-50-ohm-matching-device-Q9-adapter/32661228102.html and I wondered how good/bad these are. Thanks to your teardown now I see these are pretty much the same as the DIY ones I made a while ago :D |
| BravoV:
--- Quote from: lukier on July 07, 2017, 06:37:13 am ---Thanks to your teardown now I see these are pretty much the same as the DIY ones I made a while ago :D --- End quote --- As its clear it can be opened, I guess its time to mod it with better resistors or even construction to make it better at high freq ? |
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