[1000mp] Isolation transformers

[R Hamment]

Hi Dave and the group
With regard to the isolation transformer most Radio shack ,ect, 
transformers audio response 6dB drop off is at about 300 -400hz on 
bottom end, as you will be using it for contest work this is fine, just 
about anything will work with appropriate resistive pad on the output to 
get you the correct levels.
If you look at nu9n's web site there is some very informative 
information on this topic .
If you want the best go the Jensen  transformer route as some  have  
suggested.
 Good luck
             Roscoe VK3KRH