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[N6HPO]

Hi Everyone,

Will this combination work [stay on the top of the pickup cab at California freeway speeds(!)] My 2003 Tacoma P/U is a loaned vehicle, temporarily. I'd like to use the antenna on the cab's top and not worry about the mag/antenna flying off at 65 MPH...

Many thanks for taking the time to respond.

[N4MJG]

i never any have mag on top of my doing 65 mph you may try drill holeas of allen applegate if remember his name k0bg on his website !

[KG7VQ]

I have used Larson mag mounts in the past and never had problems, even driving across the country at freeway speeds. I now use them for event APRS trakers.

[N9DRY]

Hi,

I am using a Comet SBB-224 (tri band with size and profile similar to the SG-7500) with a Larsen mag mount.  This has been working quite well.  It has been blown off the roof but only 2 or 3 times in 2 years and a couple of tip overs.  "Freeway speed" with a brisk headwind or wind from either front quarter will do it.  I have had many more tip overs and a few 'off the roof' incidents due to overhead obstructions. 

This size antenna seems to be the largest that this mag mount can handle. 

[KM3F]

You don't specify the size of the antenna or the diameter of the magnetic mount.
A 5 inch magnet and a dual band 2/440 antenna about 36 " will hang on well beyond 90 mph.
My Larson mount is on an Alum cab Ford F150 between the rear light and cab.
The mag hangs on so well I have to slide it off the mount to get it free.
Only other way is to invest in a three mag base mount.
Your antenna is also 36"+/-.