Tim. How does a device such as the NCC-1 work with diversity reception on the K3? Is it useful there or superfluous? ----- Original Message -----
From: "Tim Duffy" <[email protected]> To: "Marcelo Chrispin" <[email protected]>, "Tom W8JI" <[email protected]> Cc: "HAROLD SMITH JR" <[email protected]>, [email protected], "Jon Zaimes AA1K" <[email protected]>, "Robert L' 'Chortek" <[email protected]>, "carsten esch" <[email protected]> Sent: Sunday, November 17, 2013 3:01:54 PM Subject: Re: Topband: Topband NOISE CANCELLERS Hello Marcelo, Roger on thanking Tom, W8JI! Tom designed the MFJ-1025 and the DX Engineering NCC-1. Both MAJOR contributions - helping us to enjoy our Low Band hobby! 73, Tim K3LR -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of Marcelo Chrispin Sent: Sunday, November 17, 2013 3:50 PM To: 'Tom W8JI' Cc: 'ZR'; [email protected]; 'Jon Zaimes AA1K'; 'HAROLD SMITH JR'; 'Chortek,Robert L'; 'Tim Duffy'; [email protected] Subject: Topband: RES: NOISE CANCELLERS Mr. Tom - W8JI Et. All Top Band guys. Mr. Tom, is a great honor for me to receive your comments. I'm sure everyone thinks like me. I also want to thank all those who are interested in this subject, and further development of the technique of noise cancellation in the Top Band. Any hint is very welcome. I really appreciate yours comments and yours attentions. VY73 Marcelo Chrispin - PY5MC Araucaria DX Group CWJF De: Carsten Esch [mailto:[email protected]] Enviada em: domingo, 17 de novembro de 2013 07:55 Para: Tom W8JI; Marcelo Chrispin; [email protected] Assunto: Re: Topband: NOISE CANCELLERS ... I would like to try the DXE NCC-1 too (have one sitting here) to fight some noise on 80/160m ... I have a Hi-Z 8-circle for RX, TX antenna is a matched tower ... The DXE manual says: ---- "The NCC generally works best when both antennas have similar patterns, polarization, and S/N ratios. You may have to experiment to find the best antenna, but successful operation occurs more often with similar antennas. Use with Beverage or Other Low Noise Antennas The NCC-1is probably most useful when used to enhance reception on lower frequencies. The NCC-1 is often useful even if the station already employs low noise directional receiving arrays. A suggested method follows: Connect one Beverage or other similar low noise receiving antenna to INPUT A Connect another Beverage or another low noise receiving array to INPUT B Connect theNCC-1 RECEIVER connector to the receiver's input line. If you are using a Reversible Beverage, runtwo feedlines back to theNCC-1 INPUT connections. Then use the NCC-1 to control the directivity and nulls. ---- Any suggestion on how to use the unit best? Set up another single RX Element? Use 'the tower'? Thanks! Carsten, DL6LAU Am 17.11.13 00:34, schrieb Tom W8JI: What is the best acquisition between Timewave ANC-4 or MFJ-1025? While all of them will work, the Timewave phase adjustment causes a huge change in level. It also has less phase range. That is bad, because you have to go back and forth between the controls more. The phase should really only change phase, and the level or balance should really only change the signal levels. The MFJ is much better at control action than the Timewave, and it has much better IMD performance. The DXE NCC is, of course, better than the MFJ for everything. The DXE has much wider phase range and better IM performance, but you pay for the complexity. 73 Tom _________________ Topband Reflector _________________ Topband Reflector _________________ Topband Reflector _________________ Topband Reflector
