[TenTec] THANK YOU AND APOLOGY - for Billy

[Jim Brown]

On 7/27/2014 11:26 PM, Rick - DJ0IP / NJ0IP wrote:
> I should have said by inserting a bandpass filter in the antenna line *of
> the transmitter causing the noise*, we can reduce all interference...

Not quite. Bandpass filters can only kill out of band noise -- that is, 
a 20M bandpass filter passes ALL 20M signals, regardless of where they 
come from, but will effectively prevent its own noise from being heard 
on 30M, 17M,15M, 12M, and 10M. But it will have NO effect on in-band 
trash -- trash that it generates on 20M, or 20M trash that someone else 
generates.  Likewise, a 15M bandpass filter on the 15M rig will prevent 
it from hearing 20M trash, but it won't do anything for trash that is ON 
15M from a 20M rig.

73, Jim K9YC