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

🔗8-piece versatile adapter set

🛡️Gold & nickel plating for durability

VT4111

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Connect Like a Pro — Never Miss a Signal!

UNIVERSAL COMPATIBILITY - Perfect for SDR dongles, HAM radios, walkie talkies, and wireless LAN devices.
RUGGED BRASS CONSTRUCTION - Built tough for both indoor and outdoor use, ready for your next RF adventure.
COMPLETE 8 PIECE ADAPTER KIT - Includes all SMA to BNC male/female combos to fit any RF setup effortlessly.
PREMIUM GOLD NICKEL PLATING - Ensures corrosion resistance and low transmission loss for long-lasting reliability.
SEAMLESS 3 G HZ RF PERFORMANCE - Supports high-frequency signals with minimal loss for crystal-clear connectivity.

The exgoofit SMA to BNC Adapter Kit offers 8 versatile brass connectors with gold and nickel plating, supporting up to 3 GHz frequency. Designed for low-loss, corrosion-resistant RF connections, it’s compatible with a wide range of devices including HAM radios, SDR dongles, and walkie talkies, making it an essential tool for professionals demanding reliable wireless performance.

Specifications

ASIN	B078K5563Y
Best Sellers Rank	#1,186 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 (474)
Data Transfer Rate	3 Gigabits Per Second
Ethernet Cable Category	Cat 6a
Frequency	3 GHz
Gauge	16.0
Indoor Outdoor Usage	Indoor, Outdoor
Item Weight	1.76 ounces
Manufacturer	exgoofit
Model	8541741496
Number of Items	8
Number of Pins	8
Other Special Features of the Product	Gold Plated, Low Loss
Part Number	43223-1511
UPC	795042075238

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