In addition to the overall shape of the antenna (length vs diameter), a big factor in creating deep nulls is the symmetry of the antenna, both physically and electrically. In addition the symmetry of

Jim - The 705 is a nice little Zenith, but I think you would really like a 790 Navigator MUCH better. Look here- http://www.seedforsecurity.com/picture20.php?type=radio&imageid=341 You might want to

Hello All, The Tecsun PL-360 is one of the smallest Si4734 DSP-chip Ultralights, witha rather modest stock loopstick. It has fixed 3 kHz DSP selectivity,and fully enabled soft mute-- similar to the

This session was from the Isle of Palms,S.C. near Charleston. 4.5.10-4.6.10 740 CFNZ Canada,Toronto AM 740 & psa for a Toronto event.2015-2018 EDT.fair.E-100 barefoot. 630 Radio Progresso Cuba

Thank you both for your answers!

--- In ultralightdx@..., "ferrite61" wrote: > > 1.) This property involves the "Q" or figure of merit of the antenna. Higher Q does more than improve selectivity. As you've noted, higher Q is

--- In ultralightdx@..., "Pollock,Raphael E" wrote: > > What about the following issues: > 1. Tight center wound coil versus loose winding around a larger length of the ferrite bar? Paul S. covered

1.) This property involves the "Q" or figure of merit of the antenna. For example using solid wire tightly wound on a ferrite rod has low "Q". Adjacent channels will also be received because the

What about the following issues: 1. Tight center wound coil versus loose winding around a larger length of the ferrite bar? 2. Litz versus standard single or multistrand wire for coil winding? 3. If

I'm not an engineer, nor even an Amateur, but I can start the answer in a simple fashion. Essentially, the ratio of the ferrite rod length compared to its diameter determines the nulling quality.

I was able to log my 23rd Mexican state last night on the SRF-59 w/ SAT. 620, XEOO, Tepic, Nayarit, 0417 UTC, 4/11/10, 719 mi/1331 km, pgm was pretty much all tlk from what I could tell. Hrd 3 "Doble

Can any of the engineers here explain why some radios are VERY directional using the internal ferrite loops? With my PL-600 I can easily separate stations in different directions by only a fairly

With only one turn, maybe you could build a collapsible frame, with spokes which can be removed from a 'hub', or if you can find a beach umbrella with out any metal, to use as a collapsible frame. I

Yesterday I modified my 62-inch-tall PVC loop frame for one turn of wire, which measured 7 uH. Calculations showed this loop should be 4 dB better than the Hoop Loop. The frame is 1-1/2" PVC in a

This was very definitely WSUB 980 in Groton CT as I tuned by them yesterday and they had Yankees baseball. I am about 4 miles from the transmitter in SE CT and was very surprised that they were

I didn't hear a clear ID for WTEM, but many ESPN ID's. So it is likely that's what I heard, but I wouldn't log something like that.Sometimes WOFX would drift in over the signal even with the 'radio'

I will also add that by the time the first response was generated at 755PM EST, the Yankees game was over. The best I can conclude is that maybe WOFX carried the game, even thought there are numerous

1. WTEM is listed as a broadcast affiliate for the Baltimore Orioles. 2. MLB does not allow stations to broadcast games over the Internet so that they can get people to subscribe to the MLB Internet

The oldies are still fading in and out with coverage of a live game. WTEM would make sense, but on line they are talking about Tiger Woods. Could live game coverage be blocked on line? I can't make

A thought occurred to me that Farmeric would have to adjust the set more E-W... definately WNW to ESE from his location to mimic my conditions. Paul S. in CT