Does the K-40 twist off for entry into low garage?

If you twist it. It comes off. I don't know if these are still being made, but there is a small cap that fits over the base when the antenna is removed to eliminate rain and such.

does the k40 antenna support the cb weather bands?

Yes, my Bearcat receives the weather channels with no problem.

Is this a magnetic mount or capable of mounting on the center of a auto roof without drilling?

Yes Rich, as long as the auto roof is made of STEEL. The magnet is one of the strongest holding magnets I have ever seen. And the long whip, once tuned really adds to a good Cb. Doran

I have the uniden 980ssb, a cb / sideband radio. how is the performance on sideband with this antenna?

It works excellent with my Cobra 140 SSB CB. I used the magnetic mount in the center of the roof of my F-150. Sometimes 30 to 40 miles without skip on side band. I would buy it again.

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K40 K40A 57.25" Base Load CB Antenna Kit with Stainless Steel Whip and Black/Red K40 Logo

Product ID: 4786237

Details

Antenna
Radio
Brand
K40
Color
Black
Global Trade Identification Number
Impedance
50 ohm
Manufacturer
K40 Antennas

📡57.25" stainless steel whip

🔌18 ft RG-58A/U coax, 95% shielded

⚙️30° rotating base for perfect polarization

₹ 21887

Duties & taxes included

In stock

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Description

📡 Elevate your CB game with the antenna pros swear by!

UNMATCHED SIGNAL REACH - 57.25" stainless steel whip delivers superior range and clarity for all 40 CB channels.
PLUG PLAY VERSATILITY - Universal mounting and detachable design make setup and storage effortless—stay connected anywhere.
PROUDLY MADE IN THE USA - Crafted with precision and backed by a 1-year warranty—trust in quality that lasts.
DURABILITY MEETS CONVENIENCE - Stranded coax cable resists breakage while the radiused tip dissipates static without fragile parts.
ENGINEERED FOR PEAK PERFORMANCE - Exclusive METLPLAS construction and unique capacitor ensure consistent SWR and minimal static interference.

The K40 K40A CB Antenna Kit features a 57.25-inch 17-7 stainless steel whip optimized for maximum 500W power handling and universal mounting. It includes an 18-foot custom RG-58A/U coax cable with 95% shielding and a 30° rotating base for ideal vertical polarization. Exclusive METLPLAS construction and a unique capacitor deliver consistent SWR across all 40 channels, while a radiused tip reduces static without fragile components. Detachable design and durable materials make it perfect for mobile or base use, proudly made in the USA with a 1-year limited warranty.

Specifications

ASIN	B000FSADEA
AntennaDescription	Radio
Best Sellers Rank	#246 in Two-Way Radio Antennas
Brand	K40
Color	Black
Customer Reviews	4.2 4.2 out of 5 stars (274)
Global Trade Identification Number	00045464769513
Impedance	50 ohm
Item Type Name	Baseload CB Antenna Kit
Item Weight	2.3 pounds
Manufacturer	K40 Antennas
Maximum Range	18 feet
Mfr Part Number	K40A
Model Number	K40A
Number of Channels	40
Number of Items	3
UPC	045464769513 739238110402
Unit Count	1 Count
Warranty Description	1 Year Limited

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