Will these work for 300ohm to 75ohm outdoor antenna to coaxial connection?

300 ohm cable is generally twin-axial balanced line and does not have connectors. Generally a transformer us needed. These connector are 50 ohms, so there will be a mismatch to 75 ohm cable. Not a big deal for receive applications. Most 75 ohm coax cable takes F type connectors. "These are not the connectors you are looking for" IF you need 50 ohm SMA to BNC, adapters, these have worked fine for me.

Will these work for sdi video camera connections?

For SDI you usually RG-59 or RG-6 and SMA is really for much lower performance thinner RF cable so it will work for a short run but probably not optimal

Yes .... you may use these adapters in a 50ohns cable

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BNC to SMA

Product ID: 58060844

Details

Brand
exgoofit
Cable Type
Coaxial
Compatible Devices
for SDR PC
Connector Type
BNC Coaxial RF
Special Feature
Gold Plated

📶3 GHz max frequency

🔗8pcs versatile connectors

🛡️Gold & nickel plating for durability

€ 17.87

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Stay connected, stay ahead — the ultimate SMA to BNC adapter kit for pros!

COMPLETE 8 PIECE KIT - Includes all male/female BNC to SMA adapters for every connection need.
PREMIUM BUILD QUALITY - Brass copper body with corrosion-resistant gold and nickel plating ensures longevity.
UNIVERSAL COMPATIBILITY - Fits top handheld radios like Baofeng, Wouxun, Kenwood, Yaesu, and SDR dongles.
SEAMLESS RF CONNECTIVITY - Connect BNC antennas to SMA radios with zero signal loss.
OPTIMIZED FOR HIGH FREQUENCY - Supports up to 3 GHz frequency for crystal-clear transmission.

This 8-piece SMA to BNC adapter kit offers reliable, low-loss RF connections up to 3 GHz. Crafted from brass with gold and nickel plating, it ensures corrosion resistance and durability. Compatible with a wide range of handheld radios, SDR dongles, and wireless devices, it’s the perfect solution for professionals demanding seamless antenna connectivity.

Specifications

ASIN	B078K5563Y
Best Sellers Rank	#1,507 in Audio & Video Connectors & Adapters
Brand Name	exgoofit
Cable Type	Coaxial
Color	silver
Compatible Devices	for SDR,PC,Handheld Radios, Scanner,Walkie Talkie
Compatible Phone Models	No Compatible Phone Models
Connector Gender	Female-to-Female, Male-to-Female
Connector Type	BNC, Coaxial, RF Connector, SMA
Customer Package Type	Standard Packaging
Customer Reviews	4.6 4.6 out of 5 stars (478)
Data Transfer Rate	3 gigabits_per_second
Ethernet Cable Category	Cat 6a
Frequency	3 GHz
Gauge	16
Indoor Outdoor Usage	Indoor, Outdoor
Item Weight	1.76 ounces
Manufacturer	exgoofit
Model	8541741496
Model Name	8541741496
Number of Items	8
Number of Pins	8
Other Special Features of the Product	Gold Plated, Low Loss
Part Number	43223-1511
Recommended Uses For Product	connecting BNC devices to SMA devices, widely used for RF applications, antennas, wireless LAN devices, coaxial cables, Wifi, ham radios, handheld radios, scanner, SDR, base stations aerial, uhf/vhf operator, PC/LAN telecom
UPC	795042075238

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