EEVblog Electronics Community Forum
Products => Other Equipment & Products => Topic started by: WT4DX on April 10, 2024, 03:08:19 am
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Is there one company that makes a consistently more accurate 50 ohm RF terminator over another?
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Most no-name BNC ones are best avoided, since they are likely intended for old LAN setups, and are not very wideband.
The 50 ohm terminators/loads with a datasheet will be best, because you can examine that to see if it meets your needs (they will have a chart or table of return loss values). Examples are Minicircuits (generally affordable) or Huber+Suhner (might be a bit more expensive). Other examples off the top of my head that may offer them are MACOM, Radiall, Rosenberger, I've not purchased 50 ohm terminators/loads from them though. I'm sure there are even more exotic suppliers.
I've bought 50-ohm loads from Minicircuits if it's cost-sensitive (but it is still backed up by a datasheet), otherwise Huber+Suhner. Both are available from normal electronics distributors usually (or can buy direct from Minicircuits).
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Shabaz is correct, in my experience,. BNC are usually not good for higher freq.
I have a bunch of BNC 50 ohm loads Brand Name, Amphenol. as I remember, good to maybe 50 MHz
Also a bunch of Huber Suhner SMA loads good to over 3 GHz, This is as far as I can test.
I have lots of both, new in packages, if you want some.
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The best are old Tektronix 50 Ohm BNC 0.5W
Most accurate are vintage EG&G with 0.1% accuracty.
We use Mini-Circuits excellent HAT-xx+ (xx = attn in db)
DC-2 GHz, fine construction, just $10 and small orders easy.
https://www.minicircuits.com/WebStore/terminations.html (https://www.minicircuits.com/WebStore/terminations.html)
Made in amy power levels, BW and connectors, eg SMA, N, BNC.
ENjoy,
Jon
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What is an acceptable accuracy tolerance for a 50 ohm terminator?
Thanks,
Tem
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Does anyone own this N-Type Huber+Suhner terminator (65_N-50-0-1/133_NE)?
If so, would you tell me the average return loss in the 1MHz -1GHz range?
Thanks,
Tem
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Tem: Accuracy:
Rtn loss is only slightly affected if term is off bu a few %
DC accuracy to test eg Scope input Zo, should e at least 1%
It possible to have a fine wideband RL but the DC R and accuracy is not perfect.
Our old EG&G have 3 digit cal eg 51.1 Ohm.
The TEK can be off 2 %
Jon
Jon