[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [IRCA] [MDXC] Desert DXPedition
We used "Wire-Stretchers" (tied the ends of the Cat-5 to the back of two
4-wheelers and sped away from each other).
Regards,
Mark Durenberger
-----Original Message-----
From: Forrest Skaine
Sent: Sunday, May 10, 2015 8:37 PM
To: Jim Dale
Cc: Baumgartner Fred ; NRC ; IRCA Mailing list for the International Radio
Club of America ; Shafer Mike
Subject: Re: [IRCA] [MDXC] Desert DXPedition
We turned up some troublesome results with extended Cat-5 transmission
lines that will be the basis for a follow-on report.
Did you use explosives (g)
Sincerely
Todd Skaine
Woodbury, MN
Sony ICF 2010
Toyota car radio
On May 10, 2015 8:10 AM, "'Mark Durenberger' Mark4@xxxxxxxxxxxxxxx [MDXC]" <
MDXC@xxxxxxxxxxxxxxx> wrote:
90-second Desert-DXPedition report:
CX were excellent 042815--050215. A LOT of time was wasted on trying to
get good F/B on D-Kaz 140 x 22's...until we went back to the basics*****
and THEN it really hummed. Two D-Kaz 140 x 22 in Broadside (340-foot
separation) produced marvelous results; heard well over a hundred stations
not previously copied. The real satisfaction was hearing stations down
the
bore-sight of the Broadside while the antenna rejected other Co's lots
closer but outside of what appeared to be a nice, narrowly-focused main
beam.
Experiments with a 1000-foot MW horizontal loop were disappointing
(likely, at 25 feet, not high enough).
A 1000-foot BOG worked as BOGs usually do...though F/B nulls were not
great.
Were able to load a 30-foot vertical in such a way as to create a
fairly-wide "sweet spot" that increased antenna sensitivity without
creating a sharply-tuned situation.
At one point we had five antennas up over a few acres of desert and did a
lot of comparison recording. We also "pre-swept" some antennas using a
RigExpert Antenna Analyzer. That showed us SWR, Reactance, Resistance,
Phase etc.
Then the winds picked up and that precluded our intended comparisons among
two large Super-Loops and some âD-Kaz-on-steroidâ lengths with larger
aspect ratios. Those are now goals for the next DXPedition.
Power this year was provided via *solar cells* recharging deep-cycle
batteries that powered our lap-top-charging inverter. (We were doing so
much construction that we had the down-time for re-charging.) At the Ft.
Wayne July convention we hope to present a seminar on the RIGHT way to
power field equipment for continuous, no-charging, low-noise operation <g>
Weâll be sorting the data for months. So far we've published a log of the
Broadside catches (ping me if you want an Excel copy).
***** *We turned up some troublesome results with extended Cat-5
transmission lines that will be the basis for a follow-on report.*
Cheers!
Mark Durenberger
__._,_.___
------------------------------
Posted by: "Mark Durenberger" <Mark4@xxxxxxxxxxxxxxx>
------------------------------
Reply via web post
<https://groups.yahoo.com/neo/groups/MDXC/conversations/messages/6781;_ylc=X3oDMTJwMDc2bHY2BF9TAzk3MzU5NzE0BGdycElkAzE4Mzg3MzAEZ3Jwc3BJZAMxNzA1MDYzMTA4BG1zZ0lkAzY3ODEEc2VjA2Z0cgRzbGsDcnBseQRzdGltZQMxNDMxMjYzNDE3?act=reply&messageNum=6781>
â Reply to sender
<Mark4@xxxxxxxxxxxxxxx?subject=Re%3A%20Desert%20DXPedition> â Reply to
group <MDXC@xxxxxxxxxxxxxxx?subject=Re%3A%20Desert%20DXPedition> â Start
a New Topic
<https://groups.yahoo.com/neo/groups/MDXC/conversations/newtopic;_ylc=X3oDMTJlNTc2bTRmBF9TAzk3MzU5NzE0BGdycElkAzE4Mzg3MzAEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTQzMTI2MzQxNw-->
â Messages in this topic
<https://groups.yahoo.com/neo/groups/MDXC/conversations/topics/6781;_ylc=X3oDMTM0ZjIyamprBF9TAzk3MzU5NzE0BGdycElkAzE4Mzg3MzAEZ3Jwc3BJZAMxNzA1MDYzMTA4BG1zZ0lkAzY3ODEEc2VjA2Z0cgRzbGsDdnRwYwRzdGltZQMxNDMxMjYzNDE3BHRwY0lkAzY3ODE->
(1)
Visit Your Group
<https://groups.yahoo.com/neo/groups/MDXC/info;_ylc=X3oDMTJlM201cXE0BF9TAzk3MzU5NzE0BGdycElkAzE4Mzg3MzAEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTQzMTI2MzQxNw-->
[image: Yahoo! Groups]
<https://groups.yahoo.com/neo;_ylc=X3oDMTJkcm5oNnQzBF9TAzk3NDc2NTkwBGdycElkAzE4Mzg3MzAEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxNDMxMjYzNDE3>
â Privacy <https://info.yahoo.com/privacy/us/yahoo/groups/details.html> â
Unsubscribe <MDXC-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe> â Terms
of Use <https://info.yahoo.com/legal/us/yahoo/utos/terms/>
.
__,_._,___
_______________________________________________
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
_______________________________________________
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