[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [IRCA] [am] BOG experiments, week 2: Amazing results!
Taking a look at Jim's comparisons between the E-W BOG and the N-S BOG we
can see big differences once we figure out what some of his UNID's are. I am
familiar enough with domestic DXing to have a good idea what many are, but
looking here is also helpful http://topazdesigns.com/ambc/
Jim, you want to do your best to ID the situations where you have a major
difference between the two antennas. For example on 540 you have it lots
better aimed S..I assume this in DFW area. 550 again much better aimed N-S,
I presume this is KS. 570 again better N-S..one would expect DFW. 620 and
660 DFW's better N-S. Now look at 710 which is about due west of OKC. They
were gone on the N-S BOG. 820 is gone on the E-W BOG but a B on the N-S BOG,
this is WBAP from DFW etc etc etc all the way up to the high end where DFW's
on 1630 and 1700 are lots better aimed N-S.
Midband..your 1020 sb KOKP Perry and it was lots better N-S as was KRLD 1080
Dallas. 1320 you have a C rating aimed E-W, likely KCLI Clinton as it was
gone N-S.
Yeah..now you see how well BOGs work !!
From what you wrote, I don't suggest grounding the rx to the car ! I'd just
keep my hands off the rx when measuring strengths and let it float.
Also did you BOG's run from North to South ? ie aim South from the rx or
visa versa and also same question for E-W BOG.
73 and look forward to having all kinds of fun if you can phase 2 of them //
and stay in that park at least somewhat after sundown. .. KAZ
----- Original Message -----
From: "Russ Edmunds" <wb2bjh@xxxxxxxxx>
To: <am@xxxxxxxxxxx>; <irca@xxxxxxxxxxxxxxxx>; "AM DX List" <am@xxxxxxxxx>
Sent: Monday, October 05, 2009 4:31 PM
Subject: Re: [am] BOG experiments, week 2: Amazing results!
I have used BOG's of 500' and they are indeed directional across the band.
What differs as you add length is the directionality and in some cases the
strength of signals. Between 500' and 1500' ( the longest I've had
experience with ) the pattern narrows, which translates into more rejection
off the sides.
Unterminated, you'll see some signals off the end where you have the
receiver, but they'll be somewhat weaker than those from the far end.
Adding a termination at the far end will enhance that effect.
With a roughly 1000' BOG on the beach in New Jersey, aimed at 42 degrees
( // the coastline at that point ) the vast majority of the stations heard
using that antenna were between 25 and 65 degrees. In this case there's
very little reasonably possible at less than 25 degrees, but at 65 - 70
degrees, signals started to drop off. At 500' the beamwidth is about twice
that based on a southwest-terminated antenna.
Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@xxxxxxxxx>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot
--- On Sun, 10/4/09, Jim Glover <psykey@xxxxxxxxxxxx> wrote:
From: Jim Glover <psykey@xxxxxxxxxxxx>
Subject: [am] BOG experiments, week 2: Amazing results!
To: amfmtvdx@xxxxxxxxxxxxxxx, am@xxxxxxxxxxx, irca@xxxxxxxxxxxxxxxx,
abdx@xxxxxxxxxxxxxxx, am@xxxxxxxxx
Date: Sunday, October 4, 2009, 4:19 AM
If you've been keeping up with my BOG
exploits, you may want to have a look
at this report about my latest experiments:
http://www.qsl.net/wb5ude/bog/bog091003.html
If you haven't been keeping up, or, if you'd like to see
some of my budding
opinions about BOG's, I invite you to read my new general
BOG page:
http://www.qsl.net/wb5ude/bog/
To review my experiments from last week, see:
http://www.qsl.net/wb5ude/bog/bog090926.html
Opinions, comments, and discussion will be gratefully
welcomed.
_______________________________________________
AM mailing list
AM@xxxxxxxxx
http://nine.pairlist.net/mailman/listinfo/am
_______________________________________________
AM mailing list
AM@xxxxxxxxx
http://nine.pairlist.net/mailman/listinfo/am
--------------------------------------------------------------------------------
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.420 / Virus Database: 270.14.3/2415 - Release Date: 10/05/09
06:19:00
_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca
Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers
For more information: http://www.ircaonline.org
To Post a message: irca@xxxxxxxxxxxxxxxx