[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: A couple more Tonna Questions


I used Tonna 2m and 70cm antennas about 20 years ago. I stopped using them
because the 70cm antenna (at least) didn't perform well at 435 MHz; it turned
out that it was cut for 432, not 435. I asked Tonna how to modify it but
never got a reply. Thin elements (about 8-gauge) didn't have the bandwidth
that other antennas with tubing elements have. Make sure that the antenna is 
specified for 435 rather than 432.

> 1. How is the antenna connected to a crossboom or mast?  (Would it be
> easy to attach it in an X pattern or only in a + pattern?)

As far as I recall I made a 45 degree bracket from thick aluminium to achieve 
the X orientation on them. 

> 2. The elements appear to be insulated from the boom.  Is this correct?

There was no insulation on the models I had; went thru a hole in the boom and 
were retained with spring clips.

Richard W L Limebear G3RWL
FOC # 1188

          So many beautiful girls ..... (sob) so little time
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org