Can someone tell me what type of connector this is? - RC Groups
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Jun 13, 2012, 11:20 AM
Registered User
ImAcracker's Avatar

Can someone tell me what type of connector this is?

Greetings fellow RC'ers. I purchased this VRX from and was wondering what type of connector this was. At first I thought it was a cheap version of a standard SMA, but when I try to thread on a standard SMA connector to it, it does not fit. The threads wont start. It feels as if the inner diameter of the connector on RX is smaller than a standard SMA. I guess I should have takes some measurements. I will do that when I get home.

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Jun 13, 2012, 12:00 PM
Technoweenie's Avatar
Looks to be an "F" connector similar to cable TV connectors. This is fairly typical of video RXs for FPV.
Jun 13, 2012, 12:07 PM
Registered User
The page does say "Detachable SMA Omini antenna " which suggests it is an sma.

F connectors are much larger diameter than sma.
Jun 13, 2012, 01:49 PM
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malcr001's Avatar
Those type of recievers are normally SMA. I have two that look exactly the same but from RMRC and they are SMA connectors.
Jun 13, 2012, 02:41 PM
Registered User
ImAcracker's Avatar
I went home for lunch and grabbed the RX. Took some measurements and the RX connector inside diameter is about 4.45mm to 4.5mm. Standard SMA inner diameter is about 4.6MM. Amazing that the difference is that close. I have measure about 5 different SMA connectors laying around and all of them are about 4.6MM. Looks to be power quality control on this "SMA" wannabe connector on the RX? I wonder if anyone else has ordered this same RX from Hobbywireless. I'll probably end up replacing the connector on the RX with a real SMA connector of some sort.
Jun 14, 2012, 02:10 AM
Registered User
alexedit's Avatar
If it is an F connector you can just use this to make it ab sma
Jun 14, 2012, 09:26 AM
Registered User
ImAcracker's Avatar
It is not an F connector. The outer diameter of the connector is way to small to be an F connector.

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