Hi Kevin,
With SSB, pretty much required, in order to get your Tx and Rx aligned
with each other and with the others you are talking to. It can be done
by computer with half duplex, but the operator on the other end will
probably need to work harder.
With FM it's highly recommended, not so
I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock? (Assuming it's an icy thing...)
Greg KO6TH
Vince Fiscus, KB7ADL wrote:
At 09:01 AM 2/8/2013 +1100, Tony Langdon vk3...@gmail.com wrote:
On 8/02/13 7:49 AM, Bob- W7LRD wrote:
maybe asteroid bounce? (EAE)
73
I liked this FO-29 video, ideal for running at hamfests, see
http://www.uk.amsat.org/?p=12592
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
Join or Renew your AMSAT-UK membership at
http://shop.amsat.org.uk/shop/category_7/Membership-of-AMSAT-UK.html
I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock?
Let's see, power goes down as 1/R squared. So lets compare it to a
candle. A candle is about 50 Watts or about (435000/50W) or about 10,000
times less power. Take the square root of that to get about 100/th the
Is the 435KW an EIRP number, or power into their feed. I was thinking the
later. No?
Greg. KO6TH
On Feb 8, 2013 6:53 AM, Robert Bruninga bruni...@usna.edu wrote:
I wonder what 435kw at 28,000 km will do to the surface temperature on
that rock?
Let's see, power goes down as 1/R squared.
Jeff
On the receive end of things, check out one of the SDR dongles like the
Funcube dongle, they are inexpensive and have the added benefit of providing
a panadapter which allows you to view the entire bandpass of a transponder
satellite. A receive preamp will probably be required.
A laptop
In this video Professor Sir Martin Sweeting G3YJO talks about STRaND-1 which is
aiming to be the world's first smartphone satellite in space.
See http://www.uk.amsat.org/?p=12600
73 Trevor M5AKA
AMSAT-UK http://www.amsat-uk.org/
Join or Renew your AMSAT-UK membership at
Its been a while and I need to be refreshed. When using the sats linear
transponders how does the transmit receive work.
Does the transmit stay on frequency and tune the receiver for best receive, or
does the receiver stay and transmit frequency changes for best receive. Or do
both move if
Right after I got done my qso with k8yse I heard some other people calling me
but I was getting LOS and I could not make out the call(s) and if anyone
wants/needs fm09 or wv let me know we can give it a try. I will try to be on
the next pass.
73
Ryan
KD8ATF
Sent from my Nexus 7 tablet!
On Fri, 08 Feb 2013 18:11:07 +0100, Bill Booth ve3...@gmail.com wrote:
Its been a while and I need to be refreshed. When using the sats linear
transponders how does the transmit receive work.
Does the transmit stay on frequency and tune the receiver for best
receive, or does the receiver
Bill,
Full computer doppler control is preferred, but if it isn't possible, tune
the higher of the two frequencies. Check out this link for the One true
rule
http://www.amsat.org/amsat/features/one_true_rule.html
Dave-KB1PVH
Sent from my Verizon Wireless Droid RAZR
Bill
I tune both using SATPC32 or HRD SATtracker.
You may not need a satellite mode if you use software.
I've been running across many more folks that tune both these days.
It definitely makes for a less chaotic passband without folks drifting
through the passband.
Rule of thumb is that
Hi Bill,
Take a look at this, still the best info:
http://www.amsat.org/amsat/features/one_true_rule.html
You always receive USB but may need to Tx LSB
if the transponder is inverting.
73,
Tony AA2TX
On 2/8/2013 12:11 PM, Bill Booth wrote:
Its been a while and I need to be refreshed.
Hi Kevin, WB5RUE.
My experience beginning from OSCAR-6 suggests that Full Duplex
is really required and not only an option because the first requirement
to succesfully access a satellite transponder is to hear your signal
coming back to your receiver.
If you are able to hear back your signal
Bill,
There is a recent article from the Journal which is not on the server which
might also be of interest. I will send you a copy.
73s,
Alan
WA4SCA
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Anthony Monteiro
Sent: Friday,
On 9/02/13 2:26 AM, Greg Dolkas wrote:
Is the 435KW an EIRP number, or power into their feed. I was thinking the
later. No?
If you read the link that was recently posted, their transmitter uses
2x250kW klystrons, so it'd be RF power. :)
--
73 de Tony VK3JED
http://vkradio.com
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