[TowerTalk] Is the Atlas MT-1 Mobile Ant Transformer Good?

[Jim Brown]

On Thu, 09 Nov 2006 14:53:44 +0800, kd4e wrote:

>The old ATLAS Broadband Transformer MDL MT-1
>purports to step up a mobile antenna to 50 Ohms
>from the common low mobile antenna impedance.

DX Engineering sells a version of this that is an autotransformer 
using coils wound on ferrite cores. I own two, and used one for a 
while when I was mobiling actively. I found that it worked well to 
transform my antennas to an impedance that my rig could load more 
easily -- BUT I also found that it got warmer than I thought it 
should have after I transmitted much. I dont recall if I was 
running CW or SSB, but it was a 100 watt radio. Certainly not hot 
from the sense of failing. But the fact that it was warm indicates 
that its burning some power. 

I dont have the capability to do meaningful measurements on it, so 
I cant comment further on its efficiency.

73,

Jim K9YC