SO-239 connection on top of the ball mount for the antenna and for the PL-259 connection on the inside of the vehicle.
The plates are 3 inches in diameter and 3/8 inch thick. Stainless steel bolts
with aluminum alloy 6061 construction. A 1/8 inch thick solid neoprene rubber gasket. The body is locked to the plate with two 1/4 inch delrin pins to prevent rotation but to break away when you hit that tree limb or garage.
When installing, vertical, left to right is determined by placement of the holes. The surface needs to be near vertical since there is no adjustment in and out toward the vehicle.
This is a fixed ball, is does not swivel.
A new SO-239 antenna ball mount made from solid aluminum bar stock.
Good for any size antenna with a PL-259 base.
See More:
WSJT-X 2.1.0 Description
WSJT-X implements communication protocols or “modes” called FT4, FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon. These modes were all designed for making reliable, confirmed QSOs under extreme weak-signal conditions.
JT4, JT9, JT65, and QRA64 use nearly identical message structure and source encoding (the efficient compression of standard messages used for minimal QSOs). They use timed 60-second T/R sequences synchronized with UTC. JT65 and QRA64 were designed for EME (“moonbounce”) on the VHF/UHF bands; JT65 has also proved popular and effective for worldwide QRP communication at HF. JT9 is optimized for the LF, MF, and HF bands. It is about 2 dB more sensitive than JT65 while using less than 10% of the bandwidth. With either JT9 or JT65, world-wide QSOs are possible with power levels of a few watts and compromise antennas. JT4 and QRA64 are optimized for EME on the VHF and higher bands, and especially the microwave bands from 2.3 to 24 GHz.
FT4 and FT8 are operationally similar but use T/R cycles only 7.5 and 15 s long, respectively. MSK144 is designed for Meteor Scatter on the VHF bands. These modes offer enhanced message formats with support for nonstandard callsigns and some popular contests.
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