Topband: Image on 160M

[Tom W8JI]

>I sometimes see spurious signals at the 5kHz points when using my K7JTR 8 
>circle
> array. I tracked them down to powerful short wave station booming in when
> propagation
> is good. I think this is the curse of most broadband antenna sytems.


Roger,

Broadband systems do not need to be that bad. It isn't actually a "curse". 
In your system it probably comes from the antenna amplifiers. Unless you 
have something local, a better amplifier might be a cure.

His system has no element amps.

You have a product ending on a "5" because shortwave channels are involved. 
His systems, according to him anyway, involved an AM BCB station. It is 
impossible to generate a 5 internally in the antenna system unless shortwave 
is involved, or something on a channel ending in 5 kHz.

It will be interesting to see if Wayne comments further, but if it is 
exclusively AM BCB it has to be a receiver image or a spurious in the AM 
transmitter.

73 Tom