I have been offered a used Yaesu ATAS-100 mobile antenna. Not knowing the differences with the newer ATAS-120, I am not sure whether it would be worthwhile to spend (considerably) more money on a new ATAS-120. Does anyone have information at that regard?

73

Tony I0JX

The ATAS-100 is a good antenna using a rubber boot for coil protection. Had
a few reports about water getting into the rubber boot causing corrossion
problems internatlly, which could be repaired.
The ATAS-120 was a remake of the ATAS-100 BUT used a metal coil protector
that avoided the water damage problem.
I've used both and both work the same way. If the ATAS-100 is available at
a "really" good price, would ensure it operated OK, and would not leave it
on the vehicle 100% of the time...just install it as you need it during a
trip. Therefore avoiding any water damage, which apparantely only occurs
during a rain storm while driving.
A nice Antenna for the price, but would like to compare it to a larger
diameter coil model.

73
Norm VE3CZI
www.rodemi.com


"Antonio Vernucci" wrote in message
...
I have been offered a used Yaesu ATAS-100 mobile antenna. Not knowing the
differences with the newer ATAS-120, I am not sure whether it would be
worthwhile to spend (considerably) more money on a new ATAS-120. Does anyone
have information at that regard?

73

Tony I0JX

I've used both and both work the same way. If the ATAS-100 is available at
a "really" good price, would ensure it operated OK

After your comments, today I have bought the used ATAS-100 and, before buying, I have tested it.

I tried all bands, including WARC, from 7 to 50 MHz.

It has a good SWR on all bands except 7 MHz, where the residual SWR is too high for the FT-100D to deliver full power. With the manual procedure, I could determine that the antenna shows a clear resonance point on 7MHz, but at that point the SWR is not low enough.

However I still have to optimize the ground system in my car, so I hope the situation will improve on 7.

Thanks and 73

Tony I0JX