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wa8yxm · 09-15-2016, 12:22 PM

Thinking on this some more. The RFI problem the ham had on HN was his own RF getting back into the Shack's Audio and causing distortion.

The reason was the lack of the "Other half" of his antenna (The counterpoise) forced the Coax and Radio to assume that duty. which it did badly.

For your RECEIVED noise problem.. It might make a 3DB (1/2 S-unit) INCREASE (And by the way increase signals received by the same amount) or not

I have seen some strange things when dealing with received noise... For example.. I designed a double-j-pole (There is a name for this butr I forget what it is, it is a form of colinier array but fed at the phasing stub, not the end) worked great but if I put the shield at the "U" on teh phasing harness (Fed it as unbalanced) the noise was increadable.. Putting the shield directly across from the center wire (Balanced) no noise.

09-15-2016, 12:22 PM	#21
wa8yxm Senior Member Join Date: Nov 2007 Location: Mobile, on the road Posts: 1,139	Thinking on this some more. The RFI problem the ham had on HN was his own RF getting back into the Shack's Audio and causing distortion. The reason was the lack of the "Other half" of his antenna (The counterpoise) forced the Coax and Radio to assume that duty. which it did badly. For your RECEIVED noise problem.. It might make a 3DB (1/2 S-unit) INCREASE (And by the way increase signals received by the same amount) or not I have seen some strange things when dealing with received noise... For example.. I designed a double-j-pole (There is a name for this butr I forget what it is, it is a form of colinier array but fed at the phasing stub, not the end) worked great but if I put the shield at the "U" on teh phasing harness (Fed it as unbalanced) the noise was increadable.. Putting the shield directly across from the center wire (Balanced) no noise.