I second Frank's comments about FTDI chips. They are about as bullet proof as
you will find.
One of the reasons for problems with the Prolific chips is that they are widely
cloned. Prolific
started adding code to their drivers to identify cloned units, and not work
with them even though
-- Forwarded message --
From: Jerry Ehlers w0s...@gmail.com
Date: Sat, Jan 18, 2014 at 5:33 PM
Subject: rotors
To: amsat-bb@amsat.org
I have a good working 5400B control box and the azimuth and elevation
rotors
that need repairs all for $250.00 payment US postal
The problem with using a cable with a Prolific chipset, is that many
of these cables have counterfeit chips in them. What happens is you get
them set up with the included drivers, the cable and program work
properly, and then Windows Update replaces the driver with a newer
version, and the
From the old AMSAT website...maybe I'll move it to the new one today:
http://www.amsat.org/amsat-new/articles/Mode-J/
73, Drew KO4MA
-Original Message-
From: Gabriel - EA6VQ ea...@dxmaps.com
Sent: Jan 19, 2014 1:56 PM
To: AMSAT-BB@amsat.org
Subject: [amsat-bb] 145 MHz signal blocking
Buy a diplexer, and connect it as shown in the linked article:
http://www.amsat.org/amsat-new/articles/Mode-J/
I also tilt both of my Yagis so they're 45* to the boom, which makes
them 90* to each other.
Yes, I lose some signal on terrestrial use, but ti helped cut the
coupling, and
-- Forwarded message --
From: Jerry Ehlers w0s...@gmail.com
Date: Sun, Jan 19, 2014 at 10:43 AM
Subject: Fwd: rotors
To: amsat-bb@amsat.org
-- Forwarded message --
From: Jerry Ehlers w0s...@gmail.com
Date: Sat, Jan 18, 2014 at 5:33 PM
Subject: rotors
To:
-- Forwarded message --
From: Jerry Ehlers w0s...@gmail.com
Date: Sun, Jan 19, 2014 at 1:23 PM
Subject: Fwd: rotors
To: amsat-bb@amsat.org
-- Forwarded message --
From: Jerry Ehlers w0s...@gmail.com
Date: Sun, Jan 19, 2014 at 10:43 AM
Subject: Fwd: rotors
To:
Yep, been using one of those for years!
I have a Sinclair Labs unit that provides 100dB rejection outside of the
2 Meter band.
Jim KQ6EA
On 01/19/2014 07:32 PM, w4tas wrote:
I would also suggest a low pass filter on the two meter transmitter.
A diplexer will work well for this also.
This
Tnx everyone for the help on my drivers issue. also a very big thanks to Erich
who wrote the SATPC32 program. i also had the darn wrong Com port lol. Have a
great day everyone.
73 de Scott VE6ITV
___
Sent via AMSAT-BB@amsat.org. Opinions expressed are
Hi, Paul
I use that antenna as my Field Day antenna, as it's much easier to
transport.
At home I use an M2 2M7 and a 420-450-11 with SSB preamps.
73, Jim KQ6EA
On 01/19/2014 11:21 PM, Paul wrote:
Hello Jim,
Do you still use the GulfAlpha 'Easy Sat' antenna?
I'm looking for any advice
I know this has been answered before, but I forget. Given one Diplexer,
is it better to put it on the Tx side to limit the 3rd harmionic going
out, or better on the Rx side to limit the VHF fundamental coming in?
Tony's diagram shows the later; I would have thought the former would be
more
Hello Jim,
Do you still use the GulfAlpha 'Easy Sat' antenna?
I'm looking for any advice on improving performance.
I have already installed the diplexer as shown in the article below but it
seems I'm getting no good signal on the 70cm uplink.
Paul Delaney - K6HR
http://k6hr.dyndns.org:8080
Since I use a very good 2 Meter bandpass filter on my 2 Meter output, I
use the diplexer AT the antenna, ahead of the preamp.
Jim KQ6EA
On 01/20/2014 03:41 AM, Greg D wrote:
I know this has been answered before, but I forget. Given one
Diplexer, is it better to put it on the Tx side to
Hi all,
Was doing some snooping on some of the arduino libraries available.
If the chip is aware of it's lat/long and time, via gps, how difficult
would it be to calculate the AOS/LOS of the ISS? Given is an appropriate
TLE set, of course.
Norm n3ykf
___
The more I read about it, the more I expect that the right answer
depends on one's particular receive-side hardware. If it's already got
good out of band filtering, then the hi-pass filter offered by the
posted diagram won't help, since it's aimed at reducing the 2m
fundamental overload. For
Well, from my experience, every little bit helps.
I first had the two antennas mounted horizontally on the cross boom, and
had some interference/desense. Then I installed the diplexer, and it
lessened. Then I put the 2 Meter bandpass filter on the transmitter, and
it improved some more.
To All,
Solid State transmitters have white noise generated due to the changing I/O
reactance as a function of the junction voltage of FET/BJT devices. Since
both transmitters have low pass filters for harmonic suppression that also
reduce white noise above the transmit frequency the Diplexer is
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