K400S K-400S Diamond Original K400S Heavy Duty Hatchback/Trunk Mobile Mount - K400 Base with UHF Mount - 13.5 Feet of RG316 - PL259

Good quality

Expensive, but it works so great!

This thing is amazing!! It really can work anywhere and in any position. Robust and well built. Very easy to use and very secure.

Easy install. Holding up well.

I was not willing to drill holes in my truck to mount my VHF antenna that is 39 inches high. This is a very sturdy mount that is fully adjustable. Installation took about 10 minutes. The cable is very small and it is easy to feed it past the door weather stripping so there are no water leaks. I will probably buy a second one to mount a VHF antenna on my car.

The best but too much money

I cannot recommend this antenna mount as it is made now because it will not hold the antenna in a fixed position. I recently purchased a Diamond K400S as the recommended mount for a Diamond CR-8900A antenna. I planned on using my YAESU FT-8900R in the lower 10 and 6 meter bands which I have never used before. This was a 3,500 mile trip and unfortunately I was never able to use the radio. The antenna mount would not stay tightened. I didn’t get even 20 minutes from home before the mount started to wobble loose. After several attempts at tightening one of the axis screws, I gave up and removed the antenna. I notice that regardless how tight the axis screw is, there is still play/wobble in one of the axis (see photo). I wonder if this causes the screw to come lose in a short period of time. Note, it is not the trunk clamp wobbling. It is the axis even when screw is fully tightened. Eventually (in my case - 20 minutes), the antenna falls over because the screw comes lose and lets the axis turn freely. The CR-8900A antenna, made by the same manufacturer, specifically calls for this mount to be used. I think the mount is not stable enough for the weight of the heavy antenna. Right now, I can only use the mount when the car is stationary and I install the antenna. The antenna has to be removed to drive any distance. Although this will work in some cases, it is disappointing and does not qualify as a properly working product. Update: Dealers who sell the mount generally do not permit returns, so I emailed Diamond for support. There has been no response.

Its great stuff very will made strong and highly recommended.

Looks good, and easy to install. You can see and feel the quality

durable, good presentation, excellent material.... i love it