[TenTec] Tuner

[Jim Brown]

On 7/8/2013 12:42 PM, Richards wrote:
> (I use Off Center Fed (OCF) antennas because they tend to work on 
> their EVEN harmonics...) 

OCF antennas have inherently high imbalance, which makes their feedline 
part of the antenna, which makes them pick up lots of noise (and also 
puts RF in the shack).  They are not easy to choke, because the high 
level of imbalance places a very high common mode voltage across the 
choke, which will often fry the choke, even at moderate power levels.

MANY years ago, when the world was much quieter, and when homes were not 
full of entertainment equipment with Pin One Problems, OCF antennas were 
a very good idea.  That was then, and now is now. And NOW they are a BAD 
idea.

73, Jim K9YC