--- Begin Message ---
- Subject: Re: [NRC-AM] 1520 daytimer WTHE Long Island on tonight
- From: Mark Connelly <markwa1ion@xxxxxxx>
- Date: Sat, 2 May 2015 15:20:49 -0400
- Delivered-to: irca@xxxxxxxxxxxxxxxx
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This car-roof broadband loop might be scalable down to something like 4 ft. vertical by 5 ft. horizontal and put on a base to allow rotation and use in an indoor setting:
http://www.qsl.net/wa1ion/loop/car_roof_loop.htm
Note that a substantial amount of amplification is required to compensate for the small size. Even at 2m x 2m (6.6 ft. per side) square, amp noise floor may be a "skosh" higher than one would want for very weak signal DX such as daytime or heavy-aurora evening work. This is basically a night time DXing antenna. If you are somewhere with high ground conductivity (e.g. seashore or black-soil Nebraska farm) or at very high elevation relative to surrounding terrain, that will help the sensitivity issue. The antenna works fine around here on the car roof at sunset at beach DX sites. Take it to a low quality inland site and you might not be quite as happy.
Beyond the limitations inherent in a small broadband loop, any thoughts of serious DXing indoors need to be taken with a big grain of salt these days. Besides RF noise within a typical house today (.. it's completely DX-disabling here), I would be concerned that house wiring, metal plumbing, ductwork, etc. would affect the antenna pattern so severely that nulls - if available at all - would be shallow and not necessarily positioned as expected.
The cardioid pattern terminated loop is a good deal fussier in this regard than the ordinary figure-of-8 ferrite rod, box loop, etc.
Mark Connelly, WA1ION
South Yarmouth, MA
-----Original Message-----
From: neilkaz <neilkaz@xxxxxxxxxxxxx>
To: Earl Higgins <earlthenut@xxxxxxxxx>; William Dvorak <dxerak@xxxxxxxxx>
Cc: Michael Jeziorski <mjeziorski@xxxxxxxxx>; am <am@xxxxxxxxxxx>; irca <irca@xxxxxxxxxxxxxxxx>
Sent: Sat, May 2, 2015 12:52 pm
Subject: Re: [NRC-AM] 1520 daytimer WTHE Long Island on tonight
I don't think WWKB beams much signal your direction likely protecting KOKC. It's
also important to note what a difference antennas make. If I aim a DKAZ west or
SW I won't know WWKB is on the air. If I aim ENE as now with the array, I don't
know that KRHW and KOKC are on the air.
Bill is using a 140 ft x 20 ft DKAZ
that can be switched to 280 deg or 100 deg. Aiming 100 deg from Madison and
noting that side null for KRHW is about 10 dB down and even more towards KOKC
those stations likely wouldn't overpower the channel. If KOLM MN was on, it is
in the deep back null.
Of course not all of us can put large antennas outside.
Noting that, if someone could come up with a rotatable indoor flag-type antenna
with a cardioid pattern this could be a huge help to DXers who can't put wires
outside but have reasonably low noise with an indoor figure 8 patterned loop
(KIWA etc). Of course low noise environments indoors are rare nowadays.
73
KAZ
-----Original Message-----
>From: Earl Higgins
<earlthenut@xxxxxxxxx>
>Sent: May 2, 2015 9:11 AM
>To: William Dvorak
<dxerak@xxxxxxxxx>, neilkaz <neilkaz@xxxxxxxxxxxxx>
>Cc: "am@xxxxxxxxxxx"
<am@xxxxxxxxxxx>, "irca@xxxxxxxxxxxxxxxx" <irca@xxxxxxxxxxxxxxxx>, Michael
Jeziorski <mjeziorski@xxxxxxxxx>
>Subject: Re: [NRC-AM] 1520 daytimer WTHE Long
Island on tonight
>
>Great job guys. It's funny, what a difference a couple
hundred miles can make. Down here in St. Louis, Missouri, I feel lucky every
time I even hear WWKB u/the powerhouses KOKC and KRHW. I remember as a teenager
living near Chicago how easy and dominant Buffalo often was on 1520.
>Again,
great job on logging the "other" 1520 from New York. Earl Higgins
>
>
> On
Saturday, May 2, 2015 12:22 AM, William Dvorak <dxerak@xxxxxxxxx> wrote:
>
>
> Failed to add QTH: Madison WI 73 Bill Dvorak Madison WI
>On
Sat, May 2, 2015 at 12:20 AM, William Dvorak <dxerak@xxxxxxxxx> wrote:
>
>Heard
here too thanks to Kaz's tip. Weak to fragmented below WWKB with UC Gospel
music, call ID at 2309 CDT between two songs. NEW! Thank you very much,
Kaz!73 Bill Dvorak
>On Fri, May 1, 2015 at 10:36 PM, neilkaz
<neilkaz@xxxxxxxxxxxxx> wrote:
>
>"New York's 1st gospel station, WTHE Mineola
NY" somewhat under WKBW's coverage of the NHL draft and was bothered earlier by
Saudi het unless I uses LSB.
>
>73 KAZ 55 km NW of Chicago: Perseus and DKAZ
array with beam aimed ENE
>_______________________________________________
>Get
your copy of the
>35th Edition of the AM Radio
Log
>http://www.nrcdxas.org
>
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