Has anyone located a driver for the LVB Tracker internal USB to serial
port adapter on Windows 7 x64?
If not, has anyone reverted to the serial port connection on LVB Tracker
and used an external USB to serial port adapter successfully with
SatPC32 on Windows 7 x64?
I have an Edgeport multiple USB to serial port that has drivers for
Windows 7 x64 that I will use if I have to. I would prefer using the LVB
Tracker with its USB to serial adapter if someone has another solution.
Here is a quick AO-16 update. On Sunday I turned AO-16 long enough to
get some telemetry packets. The satellite would remain on for less
than one minute after being commanded on. A quick test of the "bent
pipe" voice mode repeater was successful. . The "hardware watchdog
timer problem" is still evident; as expected, spacecraft temperatures
are insufficient to keep the transmitter ON (needs to be above 15 deg
Orbit projections suggest that satellite illumination conditions will
not result in increased temperatures for nearly 10 years. Command
stations do periodically turn AO-16 "ON" to check on its condition and
see if the hardware timer problem has "automagically" fixed itself
(which in not anticipated, but who knows...).
3 Oct 2010 1838 utc
PACSAT MBL Telemetry Decoder Ver. 1.3 (c) Mike Rupprecht, DK3WN
+10V Battery Bus : 0.00 V
Battery Charge Reg : 0.55 mA
Base Temp : 9.07 °C
PSK RF Out : 1.90 W
+5V RX Bus : 4.87 V
+8.5V RX Bus : 8.49 V
+10V RX Bus : 11.24 V
Here is another teaser :) Several months ago I commanded the AO-16
S-band transmitter ON; it too remains functional (albeit weak), and
was received by me, Drew KO4MA, and Alan WA4SCA.
Mark L. Hammond [N8MH]
Technical papers are solicited for presentation at the 26th Annual ARRL
and TAPR Digital Communications Conference to be held September 28-30,
2007 in Hartford, Connecticut. These papers will also be published in
the Conference Proceedings (you do NOT need to attend the conference to
have your paper included in the Proceedings). The submission deadline is
July 31, 2007. Please send papers to:
225 Main St
Newington, CT 06111
or you can make your submission via e-mail to: maty(a)arrl.org
Papers will be published exactly as submitted and authors will retain
73 . . . Steve, WB8IMY
I have both a commercial and a homebrew Eggbeater and am disappointed with both, especially in light of its rather high price. Connected to my IC-7000 via an ARR mast-mounted preamp, performance is far less than with an HT and an Arrow. Guess an omni can't cut it, at least not from my QTH.
Maybe if I could get it up higher, clear of all roofs, it would do better. I can make contacts at relatively high sat elevations, but can do just as well with a $10 dual band ground plane. My friend has an Eggbeater and the same preamp at a clearer QTH, and he hears substantially better, down to 10 degrees elevation in some directions.
Good luck and 73,
> > Hi Steve,
> > It is surprising to read that you are not hearing
> anything. I have
> > repeatedly used a 2m and 70cm Eggbeater for the sats
> and have had no
> > problem hearing things. No pre-amp.
> > I was using a short cable (e.g. less than 10 meters).
> The rigs I
> > used were a FT-736r (deaf) and a FT-847 (so-so).
> > 73,
> > Dave
Doing what I try to do every vacation which is try to spend a little time
back on the birds. I've yet to have a QSO on HO-68. I hear the beacon just
fine. But I just finished my 2nd pass from NJ and was unable to hear any
signals let alone myself coming back on any mode. Did I misread the
operating schedule or am I doing something wrong? MacDoppler told me there
was a good pass to this part of the world are around 21:30 my time. Great
beacon strength but nobody else was home.
----- Original Message -----
From: Dave Webb KB1PVH
Sent: Tuesday, February 08, 2011 3:36 AM
Subject: Re: [amsat-bb] G5400 elevation issue
The highest voltage that I can get at full 180° flip is 2.78 volts with voltage adjustment pot on rear of controller box.
Dave - KB1PVH
Hi Dave, KB1PVH
Make the following troubleshooting :
Measure please the DC voltage across E2 and E1 with the antennas at full 180° flip.Since the display on the control box reads correct elevation you must read about 5 volt DC.
By the way since as measured between pin 1 and 8 of the external control DIN connector and with the voltage adjustment of pot VR4 you can get only 2.78 volt at full 180° flip it means that there is someting damaged across the operational amplifier Q4 4558 1/2
Since the pot VR4 is 10 k and there is a 4.7 k fixed resistor in series of it if you measure the voltage across VR4 you should get about 3.3 volt DC
By the way measuring the voltage between the wiper of VR4 and the ground you should get a voltage change between 5 volt to 3.3 volt while rotating VR4 fully 270° back and forth
If this is the case than the operational amplifier Q4 4558 1/2 do not correctly amplify the DC input signal applied to Q4 input pin 3 from the wiper of VR4
Measure the DC voltage between output pin 1 an ground of Q4 and rotating VR4 by 270° back and forth you should get and amplified voltage greater than 5 volt DC and if not check diodes D22-D23-D24-D25 and all components connected around Q4
If all components diodes-resistors and capacitors are nominal than it is possible that Q4 has lost amplification.
In this case change the 47 k feedback resistor R39 with a 100 k resistor and the amplification will increase at a point that flipping the antenna at full 180° the voltage across pin 1 and 8 of the DIN external connector will rise up to 5 volt DC or more.
On Feb 7, 2011 7:46 PM, "i8cvs" <domenico.i8cvs(a)tin.it> wrote:
> ----- Original Message -----
> From: "Dave Webb KB1PVH" <kb1pvh(a)gmail.com>
> To: "AMSAT -BB" <amsat-bb(a)amsat.org>
> Sent: Monday, February 07, 2011 5:16 PM
> Subject: [amsat-bb] G5400 elevation issue
> The display on the control box reads correct elevation, but on my digital
> display on the Easy Rotor Controller shows erratic elevation position. I
> have recalibrated it several times with no success. It won't read any
> elevation until it is around 20° give or take. It also seems to have become
> worse since our really cold temps set in. My best guess is the pot in the
> rotor, but not sure where to start in the process.
> Thanks in advance
> Dave - KB1PVH
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Be the first to correctly identify the three folks in the photograph published here ...
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The April 2011 issue of the AMSAT-INDIA newsletter is now available for free
Topics in this month's edition include:
- Update on the Technical talk held on April 17th
- Update on the CubeSat Communication system project by AMSAT INDIA.
- News from AMSAT organisations around the world
Download the newsletter from
Previous issues are available at:
Secretary, AMSAT India
This is the first call for speakers for the AMSAT-UK Colloquium 2011
which will be held at the Holiday Inn, Guildford, UK
(same venue as in 2010) from *Fri 29 Jul to Sun 31 July 2011*
AMSAT-UK invite speakers, about amateur radio, space and associated
activities, for this event.
Offers of talks should be sent *ONLY* to G4DPZ, via the following routes:
e-mail: david.johnson AT blackpepper.co.uk
SnailMail: QTHR from www.QRZ.com
AMSAT-UK also invite anyone with requests for Program Topics to submit
them as soon as possible to G4DPZ. Invitations for specific subjects will
be included in the future call.
Likewise if anyone knows of a good speaker, please send contact and other
information to G4DPZ.