[roc-chat] Re: Anyone With The Kenwood TH-D72 GPS Radio?
- From: Rick Maschek <rickmaschek@xxxxxxxxxxx>
- To: ROC-Chat <roc-chat@xxxxxxxxxxxxx>
- Date: Mon, 19 Dec 2011 17:56:25 -0800
Cliff, I built one using 1" pvc and the elements slide inside the pipe for
transport...and a pvc cap on the end keeps it all neatly inside (cost less than
$7.00)
http://www.nr6ca.org/70cmyagi.html
Rick ps works greatDate: Mon, 19 Dec 2011 09:35:54 -0800
From: cls@xxxxxxxxxxxxx
To: roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re: Anyone With The Kenwood TH-D72 GPS Radio?
On 2011-12-19 08:44, Richard wrote:
Mike
If you are still interested in Yagi antennas here are some
links:
Do IT Yourself: http://www.nr6ca.org/70cmyagi.html
this one says author unknown but it looks exactly like these
http://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf
I've built several and they work well, they are indeed easy, cheap,
and functional
Arrow Antenna's:
http://www.arrowantennas.com/sub/arrowiiyagi.html I have the
(http://www.arrowantennas.com/arrowii/146-437.html) for working
satellites and remove the 2m elements when tracking. This is a 7
element antenna and is around 2' long, one of the 3 or 5 elements
Yagi would work for most tracking needs. The extra gain helps pull
in the signal and what if the GPS loses lock you can still track
the transmitter.
Richard
-----Original
Message-----
From: Allen Farrington
Sent: Dec 19, 2011 6:53 AM
To: "roc-chat@xxxxxxxxxxxxx"
Subject: [roc-chat] Re: Anyone With The Kenwood TH-D72 GPS
Radio?
You can put the D72 into km mode (menu 2-C on my
version) which makes the display 100 meters. Without
WAIS, that's as good as it gets. Like most people, I
just enter it into my Garmin and drive/walk to it.
Allen
Terseness and mis-spelling courtesy of my iPhone
On Dec 18, 2011, at 5:26 PM, Greg Clark <bigredbee@xxxxxxxxx>
wrote:
Why would you bother doing that, negates the
whole point of having a GPS in the first place --
the GPS should be able to get you with 30 feet. If
the Kenwood radio doesn't support finer granularity
than .1 mile, then ditch it and use a cheapo
handheld GPS (or even your Iphone) and type the
coordinates into that (that's what I do) . Used
Garmin Etrex's are $50 on ebay.
-- Greg
On Sun, Dec 18, 2011 at
5:06 PM, Lesnick, Mike <mikel@xxxxxxxxxxx>
wrote:
Richard,
Thanks for
the input. So bottom line is that
when I’m close I would switch to the
Yagi antenna and use it like a
traditional radio beacon (non-GPS)
directional signal finding radio. Is
there a particular Yagi antenna you
would recommend for the 70cm
transmitter, the BeeLine 70 cm GPS
transmitter?
Mike
Michael
Lesnick
Axiom
Healthcare Group
18135
Santa Lauretta Cir
Fountain
Valley, CA 92708
714-594-5720
- Office Phone
714-323-5968
- Cell
714-968-7076
- Fax
MikeL@xxxxxxxxxxx
From:
roc-chat-bounce@xxxxxxxxxxxxx
[mailto:roc-chat-bounce@xxxxxxxxxxxxx]
On Behalf Of Richard
Sent: Sunday, December 18,
2011 12:52 PM
To: roc-chat@xxxxxxxxxxxxx;
roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re:
Anyone With The Kenwood TH-D72 GPS
Radio?
Hi Michael
I thrown in my experience in
tracking. I have a Kenwood F6A I
use for tracking and a Arrow Yagi
antenna(http://www.arrowantennas.com/).
You can also make your own Yagi
out of a old measuring tape do an
internet search also look up
foxhunting, transmitter hunting.
You'll need some kind of
directional ant. to aid in zeroing
in on you rocket transmitter. In
the brush at the edges of the lake
you can walk by a rocket that is
50-100' if the brush is dense
enough. By moving the the ant.
side to side and watching the
signal strength meter you can zero
in the location. It maybe
necessary to tune your receiver
off freq. a bit to attenuate the
signal as you get closer. A Yagi
can also aid you in locating the
signal after the rocket has
landed. If the transmitter antenna
is damaged (bent, wrapped up in
shock cords, etc.) or if it's in a
low spot (ditch) the signal can be
lost. It is sometime necessary to
get on a hill or a rise to get a
direction (think of a 10-15k
flight on a breezy day) members
have found rockets on the other
side of the hills to the north. On
a big level 2 or level 3 project
it's a little windy you launch and
the main unexpectedly deploys at
apogee and now your looking for
your rocket 4-5+ miles down range.
Even with GPS you need the high
gain of a Yagi or similar antenna
to get good data.
Practice, taking your Beeline
out and get someone to hide it and
practice finding it. Your local
ham clubs will have transmitter
hunts monthly in your area, talk
to the participants they'll have
good advice.
Good luck
Richard C. Hall
TRA 11515 AF6IH
-----Original
Message-----
From: Greg Clark
Sent: Dec 17, 2011 3:29 PM
To: roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re: Anyone
With The Kenwood TH-D72 GPS Radio?
I don't use my Kenwood that way --
maybe turned on the GPS once or
twice. I use a handheld GPS to
track down the rocket.
-- Greg K7RKT
On Sat, Dec 17,
2011 at 3:20 PM, Dennis Dinga
<dennis@xxxxxxxxx>
wrote:
OK Mike.
I'll wait to others on
roc-chat reply. I know that
Allen Farrington and maybe
Rob Bringham use Kenwood
APRS radios. I'm hoping
they will have your answer
before I go further. Greg
K7RKT should have the answer
too.
-Dennis
At 01:50 PM 12/17/2011,
you wrote:
Dennis
Thanks for the quick
reply. I’ve used the
combination a few time
now and the transmitter
and receiver work well
together.
Unfortunately, the scale
does not change when I
get close. If I’m
closer than 1/10 of a
mile, the reading is
simply 0.0 mi. If you
have anyone who may have
an answer I’d appreciate
it. If Im in a flat
open deters (like the
lakebed 500 feet is
fine, but if there are a
lot of obstructions it
could be hidden and 500
feet resolution will not
be very good.
Mike
Michael Lesnick
Axiom Healthcare Group
18135 Santa Lauretta Cir
Fountain Valley, CA
92708
714-594-5720 - Office Phone
714-323-5968 - Cell
714-968-7076 - Fax
MikeL@xxxxxxxxxxx
From:
roc-chat-bounce@xxxxxxxxxxxxx
[
mailto:roc-chat-bounce@xxxxxxxxxxxxx]
On Behalf Of Dennis
Dinga
Sent: Saturday,
December 17, 2011 1:41
PM
To: roc-chat@xxxxxxxxxxxxx
Subject:
[roc-chat] Re: Anyone
With The Kenwood TH-D72
GPS Radio?
Mike-
I can't answer your
question, but have you
tried an actual tracking
test? Maybe
when you get to within
500ft of the rocket, the
TH-D72 automatically
changes resolution.
If you don't get an
answer here before
Monday, drop me an email
and I'll ask the
Stratofox trackers up in
the Bay Area. They
mostly use the Kenwood
APRS radios.
On a different note, a
balloon was launched
from NorCal last weekend
and was tracked via APRS
all the way to the
Mediterranean Sea before
it deflated north of
Algeria. Pretty good
for amateurs. The track
is still on www.aprs.fi Type
in
K6RPT-11.
73, Dennis N6DD
At 12:59 PM 12/17/2011,
you wrote:
I have the Kenwood
TH-D72 radio and the
BeeLine 70cm GPS
transmitter. The
Kenwood radio display
screen shows the
distance from the radio
to the transmitter as
well as a compass with
an arrow that points the
direction of the
transmitter.
The problem is that the
distance scale is in
1/10 of a mile (500
feet) increments. Does
anyone know if the
distance scale can be
changed to feet of
meters or anything more
precise than 1/10 of a
mile?
Mike
Michael Lesnick
Axiom Healthcare Group
18135 Santa Lauretta Cir
Fountain Valley, CA
92708
714-594-5720 - Office Phone
714-323-5968 - Cell
714-968-7076 - Fax
MikeL@xxxxxxxxxxx
Dennis Dinga dennis@xxxxxxxxx
H: 909-860-1515 C: 951-313-5192
1024 Twin Canyon,
Diamond Bar, CA 91765
N6DD TRA 8427 L3
Dennis
Dinga dennis@xxxxxxxxx
H: 909-860-1515 C: 951-313-5192
1024 Twin Canyon,
Diamond Bar, CA 91765
N6DD TRA 8427 L3
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