You will more antenna base mounts here.
Magnet mat as couterpoise for HF mobile antennas
Every shortwave mobile antenn requires a good and reliable counterpoise. But with some installations that's hard to achieve, for example when using a clamp on the roof railing or when using a small magnet base.
This problem can be solved with the new magnet mat from Diamond. Just put the mat on a flat surface on the car and connect the included wire to the antenna base.. Due to the large capacity between mat and chassis metal the HF resistance is greatly reduced. When operating on 3.5MHz two of these mats are recommended. When operating on 50MHz the connecting cable should be as short as necessary (less than 20cm).
Technical data:
For heavy HF antennas with 3/8" thread or PL connector
With three large single magnets with 12cm diameter each. Magnets black, 3.5m cable with PL connector included.
Heavy duty base mount for HF antennas, exceptional quality. Recommended for Bugcatcher and Outbacker or similiar antennas.

Useful for mounting on bumper or other suitable place on a car. In some cases a metal bracket might be necessary (not included). Requires 12mm hole. Base is made of solid brass, nickel plated. Connector is a female PL socket. Comes with a heavy spring.
For antennas with 3/8" thread. Tiltable by 90°, suitable for cables like RG-58 or RG-213.
Chrome plated spring for heavy HF antennas
with 3/8" thread
Heavy base mount for all antennas with 3/8" thread. Solid base plate with tilt/swivel base with integrated spring. Suitable for use with automatic antenna tuners like SG-230 etc.
Quick disconnect for shortwave antennas with 3/8" thread.
Also available a 5-pack with one base and 5 upper parts.
Outbacker OB-360C: heavy trunk lid mount with 3/8" thread, swivel and tiltable. COmes with 5m RG-58 with PL connector.
Universal mounting bracket, stainless steel.
Universal grip mount for antennas with 3/8" thread. Consists of solid forceps with attached base for the antenna, PL socket for cable to radio. Just clamp it somewhere and get on the air.
Especially long antennas can't be mounted safely on the top of the car because that would violate the max. allowed height. And the sheet metal might not be solid enough...
The massive aluminum mount is installed on the trailer hitch and fastened with two large screws. The top surface has drill holes prepared for the 3/8" mount Order No. 11106 (not included). With the large surface area the trailer hitch mount has a good ground contact to the car.
Of course this mount is also suitable for cars with aluminum chassis, where magnet mounts cannot be used. Please observe the local vehicle and traffic regulations! Use while driving is not permitted AFAWK.
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