Its very easy to match when using the BN73-202 if you use half turn steps when needed and use an antenna bridge to confirm since ferrite Al values have a wide tolerance.
And with a low impedance line such as WD-1A there IS a difference in antenna mode and transmission line mode values. Plus you have to use the correct impedance value for the CT transformers. Carl KM1H ----- Original Message ----- From: "Andrey Fedorishchev" <[email protected]> To: "ZR" <[email protected]> Cc: "Topband" <[email protected]>; "N1BUG" <[email protected]> Sent: Monday, March 12, 2012 12:55 PM Subject: Re: Topband: How Good is Good Enough? > the KEY WORD is: "... when properly terminated at both ends ..." > > not so easy with FireRite 73 binoculars > > and the line impedance IS different from different manufacturer ... > > > > > 2012/3/12 ZR <[email protected]> > >> I dont find WD-1A or WF-16/U to be lossy at all when properly terminated >> at >> both ends. Thats what is used here for the 5 reversibles and a reversible >> BOG will be tried soon. >> >> Carl >> KM1H >> >> >> ----- Original Message ----- >> From: "N1BUG" <[email protected]> >> To: "Topband" <[email protected]> >> Sent: Monday, March 12, 2012 11:22 AM >> Subject: Re: Topband: How Good is Good Enough? >> >> >> >> If you need a preamp on any Beverage you have a problem IMO. Its too >> >> long, >> >> poorly terminated or there is a lot of feedline loss. >> > >> > Or you've been forced into some other bad situation. >> > >> > I have a local noise problem that is beyond my control. >> > Unfortunately I can't afford the DXE noise canceller so I got an >> > MFJ. With my ~600 foot Beverages as main antenna and a very short >> > vertical as the aux antenna it will completely null the noise (on >> > most Beverages). Unfortunately with its high noise floor I lose >> > several dB S/N unless I use a preamp ahead of it. >> > >> > My Beverages have lower signal output than most in some directions, >> > since they are reversible using WD-1A wire (lossy as a transmission >> > line). >> > >> > Not everyone can construct an ideal station, but even with all these >> > problems it is far better than not having Beverages at all. >> > >> > The bottom line is using a preamp buys me several dB S/N I cannot >> > get any other way (only when using the noise canceller). >> > >> > Paul >> > _______________________________________________ >> > UR RST IS ... ... ..9 QSB QSB - hw? BK >> > >> > >> > ----- >> > No virus found in this message. >> > Checked by AVG - www.avg.com >> > Version: 10.0.1424 / Virus Database: 2113/4866 - Release Date: 03/12/12 >> > >> >> _______________________________________________ >> UR RST IS ... ... ..9 QSB QSB - hw? BK >> > > > > -- > Andrey Fedorishchev, > RA6LBS > > > www.RA6LBS.ru > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1424 / Virus Database: 2113/4866 - Release Date: 03/12/12 > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
