Yeah that's right, but interference we usually care about  is in band, so the rejection is useful  only to deal with things like AM stations and NDBs. Wideband interference is usualy the job of the receiver to deal with, unless a specific application like say trying to hear a weka signal next to a transmitter (a pin drop next to an RB211  at WOT) . Narrow bandwidth is a hinderence for environments with wide bandwidth pulses (like power line arcs). I am doing a new 85kHz system, and while the Q ~ 5 assists with out of band, it's only 2nd order, and I have to be careful of aliases with the digital receiver of things like AM radio stations, NDBs etc. glen > > This is one reason tuned loop/loopsticks are popular - the reasonably > high Q resonance suppresses out of band signals.

I have seen this video, parts 1 and 2. This gentlemen also has a webpage where he advertises manufacturing and selling this exact same antenna. http://www.rescueelectronics.com/WWVB.html I emailed him a while back (before Covid) and he never responded. Don Resor From: P M <fgdhrtey@gmail.com> Sent: Sunday, September 11, 2022 6:40 AM To: Discussion of precise time and frequency measurement <time-nuts@lists.febo.com> Cc: D. Resor <organlists1@sonic.net>; jim@luxfamily.com; glenlist@cortexrf.com.au Subject: Re: [time-nuts] WWVB Loopstick Antenna Project Have you come across these fascinating YouTube videos by W1VLF? They may be of interest to you. WWVB Antenna Part 1 <https://www.youtube.com/watch?v=ySWpaAXiJCQ> https://www.youtube.com/watch?v=ySWpaAXiJCQ R/ Patrick Murphy (KG5YPQ)

Resor Suggest you try emailing him again. Those are good videos. Though not having a lathe I tend to hand wind my coils. I like his glue method. I tend to bundle them or one way or another heat shrink them together. Hand winding is not that hard. Just ensure you put a bit of tape on the wire wraps every 20-30 turns. Nothing worse than the loops jumping off. Also don't use the thinnest wire. Maybe 24-28 gauge. Easier to handle. You can put a lot of turns on in an evening. Have we taken over someone else thread?? I apologize. Regards Paul WB8TSL On Mon, Sep 12, 2022 at 12:33 PM D. Resor via time-nuts < time-nuts@lists.febo.com> wrote: > I have seen this video, parts 1 and 2. > > This gentlemen also has a webpage where he advertises manufacturing and > selling this exact same antenna. > > http://www.rescueelectronics.com/WWVB.html > > I emailed him a while back (before Covid) and he never responded. > > Don Resor > > From: P M <fgdhrtey@gmail.com> > Sent: Sunday, September 11, 2022 6:40 AM > To: Discussion of precise time and frequency measurement < > time-nuts@lists.febo.com> > Cc: D. Resor <organlists1@sonic.net>; jim@luxfamily.com; > glenlist@cortexrf.com.au > Subject: Re: [time-nuts] WWVB Loopstick Antenna Project > > Have you come across these fascinating YouTube videos by W1VLF? They may > be of interest to you. > > > WWVB Antenna Part 1 <https://www.youtube.com/watch?v=ySWpaAXiJCQ> > > > https://www.youtube.com/watch?v=ySWpaAXiJCQ > > R/ > > Patrick Murphy (KG5YPQ) > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com >