I use the MFJ-1025 (similar to the NCC-1) with my SAL-20. In my case I use my TX antenna as the sense input. My xcvr (FTdx5000) internally feeds the TX antenna to an output connector while in receive. So I just feed that signal to the MFJ-1025. Works great on local powerline buzz as well as switching PS noise that may drift into my receive BW. On 80m my TX antenna is a 4sq and on 160m it's a vertical.
Re: SAL pattern. The null is at 180 degrees if you have the delay line and couplers configured right. See the users manual and 4nec2 model. But this is more appropriate fodder for the sharedapexloop yahoo forum. 73, Kris N5KM -------------------------- original message ---------------------------------------------------------- Date: Sun, 20 Dec 2015 08:09:43 -0800 From: "Richard (Rick) Karlquist" <[email protected]> To: Rune ?ye <[email protected]>, "[email protected]" <[email protected]> Subject: Re: Topband: DX Engineering NCC-1 phase controller Message-ID: <[email protected]> Content-Type: text/plain; charset=windows-1252; format=flowed On 12/19/2015 11:46 PM, Rune ?ye wrote: > a NCC-1 from Dx Engeneering. My plan is to use this with my SAL30 RX array on antenna port A and > 73 Rune LA7THA This isn't an answer to your question, but a more straightforward way to accomplish what I think you are trying to do would be to make an array of two loops, where the azimuth of the individual loops can be chosen so that they null out the single point noise source that you are trying to null out with the NCC-1. The azimuth of the array can then be chosen to enhance in the direction of the signal you want to receive. IOW, the orientation of the loops is independent of the orientation of the array. The trouble with the SAL is that the null of the loops is always at a 90 degree angle to the angle of reception. You can't choose the angle. The other trouble with the SAL is that the spacing between the loops is always very small, and you can't choose that either. If you increase the spacing, it isn't a SAL any more, it's just ordinary loops in phase. Rick N6RK ----------------------------------------------------------------------------------------------------------- _________________ Topband Reflector Archives - http://www.contesting.com/_topband
