I think the concern about overload is another reason to not consider it. That box is not designed to handle a strong signal like another transmitter.
One other solution is to try and come up with a coax length that presents an out of phase signal at the right amplitude to cancel it out on the 2nd receiver. I know W8JI has done this on 160. I have been successful with in-band receiving on 160 with a loop antenna about 800 feet away from the TX vertical with the null parked on the TX antenna. On 20 meters, I have done it with about 500 feet separation. It's obviously a lot easier with low power (like used in the NAQP). The K5KA muiti-ops used an all band vertical for RX for the in band radios. Tree N6TR Tree N6TR On Sun, Dec 17, 2023 at 10:41 AM Kenny Silverman <[email protected]> wrote: > Thanks for all the comments, but knowing what the resulting antenna > pattern seems elusive. > > I need in-band RX antenna for a mult station. Typically antenna > separation, front-to-back and polarization are the main tools for that. > When I run out of room > > I was wondering if phasing from an NCC-2 box is another tool to consider. > But I don’t want to consider it without knowing what the resulting pattern > would be. > > Many thanks, Kenny K2KW > > > Regards , Kenny > > > On Dec 17, 2023, at 1:05 PM, Rick Kunath <[email protected]> wrote: > > > > I'm not sure we still understand the intended application of the > original poster, I know I don't. > > > > I've done lots of work with loops and loop arrays phased either > passively (active or entirely passive external phaser boxes) or actively > phased via an SDR but none of that would eliminate the need for RX > protection on the receive antenna and any electronics associated with it. > So if the OP is trying to get away from any protection from the TX energy, > I think this is false hope. A loop mounted preamp makes that more > complicated. And The NCC2 does have options for protection boards for TX > internally. There are several types available and also internal preamps. > But it cannot set a specific amplitude and phase angle on the phasing. I > don't have one and haven't ever had the pleasure of using one, but those > that do tell me they enjoy them and they work well especially for live > listening. I do like the idea of having the electronics at the shack end of > things and as little as possible at the antenna when possible, though > depending on the specifics you will have VACTROL devices or other > termination devices at at the antenna with at least some antenna types. > > > > Preset patterns and unattended work are another case entirely and this > is best done with specific phase coherent dual-channel SDRs and a specific > SDR application. > > > > I think doing what the OP might want as I might understand it is > possible, but I'd like to hear more from him about his hopes for the > project. > > > > Rick Kunath, K9AO > > > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
