I have been playing with a new Triquint ULNA device (TQP3M9036). It
Shows a lot of promise. It is like a MAR or MSA device in that it is
50ohm in and out. and has a claimed NF about .4db nf ( their numbers).
I have built several pramps to test them and have gotten even better
than they claim and they cover 50-1296 with ease and NF is .4ish or
below. The S11 and S22 are both great and the OIP3 is +35db also
...very nice device. It has great promise as a good terrestrial LNA.
Preamps are foolproof to build and would cost under $50 if all the best
quality parts are used.
Just for information only ...
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Sri I made, at least a mistake, I send it again.
Very interesting answers. I come from Sats world, where the Doppler
is a serious issue and it is so quick that it is impossible to work
I will speak thinking in one carrier. Sats need to receive in only
one fix frequency (it is an active RX with a wideband), if the Sat
receives a carrier in this frequency then it will be repeated. The
signal TX from the Sat will be in one fix frequency. So people who
work Sats must correct its TX frequency (according with actual
Doppler) to reach the sat in its fix frequency, in the same way
because of the Sats will repeat this signal in a fix frequency, people
must correct its RX frequency (according with actual Doppler).
This way of dealing with Doppler is very interesting because NOBODY
KNOWS the Doppler of the other stations and nobody needs to know it,
we only need to know our own Doppler.
If we would use this agreement to EME communications we will always
speak about the frequency we hit the Moon, in other words the
frequency which the Moon hear us and repeat our signal.
The actual EME software shows us the Doppler as the sum of the Doppler
effects to reach the Moon and to receive the bounce signal, so Moon
will receive us at ½ Doppler announced, the other ½ effect will appear
after de bounce.
I will try to set a couple of examples.
1.- We will agree to hit the Moon in 1296.070. This is the frequency I
will announce in the log. In our software the dates will be:
The sign that the software shows will aplly to RX frequency and the
opposite to the TX frequency, and always ½ magnitude on each one.
Both of us must deal with Doppler, each one must do their task to hit
the moon in the agreed frequency and to receive the bounce according
our Doppler. Then we must set on our transceivers:
TX: 1296.070 -1.5KHz = 1296.0685MHz
RX: 1296.070 +1.5KHz= 1296.0715MHz
TX: 1296.070 +1.0KHz = 1299.071MHz
RX: 1296.070 -1.0KHz= 1296.069MHz
Each station who sees the post will act only according its own
Doppler. Don´t mind where is the DX station.
2.- In this case I see a signal in my receiver in 1296.070. What
kind of pair of frequencies I must set (I know nothing about the DX
station I have still decode nothing), I only know me own Doppler, and
it is +2KHz. I must hit the moon in the same frequency that my
TX: 1296.070 -1.0KHz = 1296.069MHz
RX: 1296.070 = 1296.070MHz
WE WILL NOT NEED TO KNOW NO MORE THAN OUR DATES.
I haven´t spoken about what frequencies will be the echoes (both
echoes), to make the understanding easy.
As a drawback we should change our habits, we should always use the
RIT as follow:
TX: The frequency we choose plus the opposite sign of Doppler and ½
RIT: the sign of our Doppler and ½ Doppler magnitude.
Although at first glance it seems not to be interesting in 144MHz but
we will always hit the target in whatever band, even in 144MHz.
Somebody can tell that they need a computer, to do JT65 of course, if
you do CW surely have a smart phone with the proper software to know
your own Doppler or you can print it before.
If I made some mistakes let me know.
It is my 2 cents.
Anybody using a 144 mc LNA device called ALN0140WT ?
Specs look very interesting .. but are they for sale ???
73's Rick ,PA1BVM
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There was very nice CW activity during ARRL contest this year (on all bands except 2m from US) and it is unfortunate I did not have a lot of free time for it.
I also “worked” JT65 logger eme (I thought: who is going to find out anyway??) and apart from constant chatter I also found JAMMING.... a lot of Jamming, even from its own creator!!?
Check a small part of it from N0UK logger:
11/19 17:04 VE3KH you being jammed by K1JT and W6YX (W7IUV Larry WA DN07dg 188.8.131.52)
11/19 17:05 Why Larry .... they on 142 also? (VE3KH Kevin ON FN03aj 184.108.40.206)
11/19 17:06 They are calling me to get a contest poitn and it ain't gonna happen!! (W7IUV Larry WA DN07dg 220.127.116.11)
11/19 17:08 Thansk Larry 73 ... Yes, I have been jumped by a quite a few stations (VE3KH Kevin ON FN03aj 18.104.22.168)
11/20 17:47 Also hr k1jt calling me -22 but not ans him (KN4SM/5WL/KW Jerry VA FM16qt 22.214.171.124)
11/20 18:02 Contest = reduced courtesy! (K5DOG/2M Stevedog NM DM52xw 126.96.36.199)
11/20 18:04 Yes, K1JT and W3SZ can hear on gold tooth. (K5DOG/2M Stevedog NM DM52xw 188.8.131.52)
One thing I wouldn’t regret missing on EME is JAMMING!!!
GL 73, Petros SV3AAF
I just received a Spectrian 13 CM power amplifier today from Pyrojoseph
It would be useful to see what N5AC has done to modify his amplifier as
published in the Microwave Update 2006, pages 273-275.
Could someone email/copy these pages for me?
I have already copied several other modification articles, but could not
find the one by N5AC, since I do not have the 2006 MUD proceedings.
Steve Bell, DM42mh
Free space loss in dB to the ISS at 1296 MHz assuming perigee range 410 km
=20*log(4*pi*range*f/c)= 20*log(4*3.14159*410000*1296000000/300000000)=146.95 dB
Now if the 3m dish has about 30 dB gain and 500 watt or 57 dBm are being transmitted, then the signal arriving at the ISS would be 57+30-146.95=-59.95 dBm
This cannot create any problem to the electronics of the ISS but I don't know if the guys up there like the whole ISS-bounce idea :-)
73s de Michael, SV1CAL
--- Στις Πέμ., 30/05/13, ο/η moon-net-request(a)mailman.pe1itr.com <moon-net-request(a)mailman.pe1itr.com> έγραψε:
Από: moon-net-request(a)mailman.pe1itr.com <moon-net-request(a)mailman.pe1itr.com>
Θέμα: Moon-net Digest, Vol 107, Issue 8
Ημερομηνία: Πέμπτη, 30 Μάιος 2013, 9:56
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1. Re: First(?) ISS bounce QSO on 23 cm (Andreas Imse)
2. Re ISS Bounce (Doug McArthur)
3. Re: First(?)
ISS bounce QSO on 23 cm (Alex Trushkin 4Z5LV)
Date: Mon, 27 May 2013 07:53:44 +0200
From: "Andreas Imse" <andreas(a)imse.de>
Subject: Re: [Moon-Net] First(?) ISS bounce QSO on 23 cm
To: "'Barry VE4MA'" <ve4ma(a)shaw.ca>
Content-Type: text/plain; charset="iso-8859-1"
thank you very much.
If you need aircraft information for use in DL2ALF?s AirScout, just enter
<http://www.flightradar24.com/> http://www.flightradar24.com in Options >
Planes > URL
For everyone else, who would like to try this unique piece of software:
download it at <http://www.dl0gth.de/software/airscout.zip>
Von: Barry VE4MA [mailto:email@example.com]
Gesendet: Sonntag, 26. Mai 2013 23:33
An: 'Andreas Imse'
Betreff: RE: [Moon-Net] First(?) ISS bounce QSO on 23 cm
Congratulations?very well done. I also believe the VE contact was one
I was looking at the software required and have been trying to find a server
to download aircraft information. Can you provide me with any further
I was in Arizona USA this winter and tried on 10 Ghz with some W6s but could
really use the help of a program like DL2AF's
in the morning of May 23rd, 2013 Jan, PA3FXB and I completed a QSO on 1296
MHz via reflections at the International Space Station.
The full story can be found on www.dj5ar.de
We are now looking for EMErs in Europe, active on 23 cm, to perform further
tests with us.
Please contact us, you can find Jan and me on the HB9Q logger or ON4KST
chat, when QRV.