Products > Test Equipment
Banggood 50 ohm BNC feed-through terminator - a quick review
TheSteve:
Some time last year someone posted that Banggood had 50 ohm feed-through terminators for what is a reasonable price(6.66 USD shipped for a pair). I ordered a pair in December last year but they never arrived and a few months back Banggood issued me a refund. I was shocked yesterday when they arrived. It only took 7 months...
I did a quick check with a DMM and found one was near 50 ohms, the other though is 100 ohms - so quality control may be an issue.
Long story short the 50 ohm one actually works reasonably well.
Here is a picture showing SWR(return loss). I wouldn't really want to use these at 1 GHz but that shouldn't ever happen as any scope with such a high frequency will have a builtin 50 ohm terminator. For those with scopes up to 500 MHz without builtin 50 ohm terminators these will do the job though.
Resistor is close enough:
BravoV:
--- Quote from: TheSteve on July 07, 2017, 02:54:46 am ---For those with scopes up to 500 MHz without builtin 50 ohm terminators these will do the job though.
--- End quote ---
Steve, thank you, this is exactly what I'm expecting to hear. :-+
alm:
The 100 Ohm one might be an open resistor if they used 2 100 Ohm chip resistors in parallel.
That seems very close to the specs of the Pomona 4119-50: VSWR < 1.1 up to 250 MHz and < 1.2 up to 500 MHz. That one uses a carbon film resistor. The Tek 011-0049-01 is better (VSWR < 1.2 DC-1 GHz). But still sounds like excellent value for the money.
BravoV:
--- Quote from: alm on July 07, 2017, 03:27:06 am ---The 100 Ohm one might be an open resistor if they used 2 100 Ohm chip resistors in parallel.
That seems very close to the specs of the Pomona 4119-50: VSWR < 1.1 up to 250 MHz and < 1.2 up to 500 MHz. That one uses a carbon film resistor. The Tek 011-0049-01 is better (VSWR < 1.2 DC-1 GHz). But still sounds like excellent value for the money.
--- End quote ---
Yep, value for money for < 500 MHz works its very good.
As its full metal body, the physical built and mechanically is pretty decent imo, took a close up shot -> HERE (Beware of huge photo)
TheSteve:
So far the 100 ohm one doesn't want to come apart. I haven't gone all crazy on it though.
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