In assembling in the mounting bracket, you have 3 washers. 1 flat, 1 locking and 1 plastic isolator. as far as the isolator, top or bottom?

Antenna on top, then the plastic washer, then the metal mounting bracket, then the flat washer, then the locking washer. The antenna has to be isolated from the mounting bracket so make sure it is centered on the plastic washer or it will short out your system and the base of the antenna mount has to be grounded. You should check your SWR ratio before talking on your radio and if it is above 1.5 learn how to adjust it. If you know how to adjust it and still can not get a good reading try adding a ground wire from the antenna base to a metal ground. Certain trucks like the Mack Granite have isolated mirrors and require the ground wire.

How would you mount these antennas behind the cab of a f 550 flat bed?

You would need the L-bracket to mount to the back of the cab. If you bed has the security frame at the cab you can mount to that with a bracket.

how many come in the package?

One and it sucks it fell apart using a 4 foot fire stick antenna

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K-4A CB RADIO ANTENNA HEAVY DUTY SO-239 STUD MOUNT (BULK)

Product ID: 266327758

Details

Antenna
Radio
Brand
FireStik
Colour
Silver
Number of channels
40
Impedance
5E+1 Ohm

💪Heavy-duty construction

📡Universal fit for Firestik

🔧1/2" hole compatibility

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€ 41.39

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In stock

Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate Your Communication Game!

BUILT TO LAST - Heavy-duty design ensures durability in any environment.
BULK CONVENIENCE - No retail packaging means more value for your money.
EASY INSTALLATION - Designed for a straightforward setup with a 1/2" hole.
PROFESSIONAL QUALITY - Engineered for the discerning user who demands reliability.
UNMATCHED VERSATILITY - Fits all Firestik antennas and mounts seamlessly.

The FIRESTIK K-4A CB Radio Antenna is a heavy-duty SO-239 stud mount designed for universal compatibility with all Firestik antennas and mounts. This bulk item comes without retail packaging, making it a cost-effective choice for professionals seeking reliable communication solutions.

Specifications

ASIN	B0765QHQMZ
AntennaDescription	Radio
Best Sellers Rank	#133 in Two-Way Radio Accessories
Brand	FireStik
Color	Silver
Customer Reviews	4.7 4.7 out of 5 stars (3,671)
Impedance	50 Ohms
Item Dimensions L x W x H	6"L x 6"W x 6"H
Item Weight	0.02 Pounds
Manufacturer	Firestik
Number of Channels	40
UPC	714833139720 757183692668

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