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.
I have no special contest plans other than I will be qrv in cw random calling cq on 2m-70cm-23cm. Hope gear at eme qth is ok. Emphasis will be on 144&432MHz so as to help increase cw activity on those 2 beloved bands. Pls note that I have bad qrn on 2m at moonset window even at high elevation, but will hang in there.
A tip: due to poor moon conditions and especially deep qsb minimums expected on 2m, when you hear qrz send your call a few more times for the period(s) needed, and be patient. QSO reward in this mode deserves the extra effort.
Want to wish GL to all participating stations and hope mixed and digital stations attempt to have fun in cw also. It is not about the numbers or dxcc's, it is about the moon journey...either spacecraft man guided or not, has its merits and joy.
2m: 16*6el xpol
70&23cm: 6.1m dishes
As a follow up to my analysis of the 1st leg of the contest, I found that
an additional 51 new stations were active in the second leg, bringing the
total to 357 stations per KB8RQs 18,000 decodes.
As Gary did spend a large part of his time CQing 2nd period, there may be
more stations, specifically in the US, that were not seen decoded. If a
large European station with good ears would send me their Map65rx file, I
would gladly compare and combine for a grand total of participants, at
least for 2M JT65B
Over the weekends, I had a blast and worked a total of 130 with my
moderate setup. I decoded close to 250 station. My limitation was not
having enough time to work all the stations I saw on Map-65, before they
Thanks to all who worked me. Next year look for me on 1296.
On Mon, Oct 28, 2013 at 10:51 PM, Les Listwa <llistwa(a)gmail.com> wrote:
> Did that get your attention? Yes, 306 EME stations logged in the first
> weekend of the contest on 2M with JT65b.
> So how many did you work? Now mind you, I did not say "worked", I said
> "logged". And I did not say it was me.
> During the contest, I was wondering how many stations I missed and could
> of worked, if I had the time.....then I wondered how many stations actually
> participated in the contest, not just the few who submitted logs to the
> ARRL, but all those who got on over the weekend and generated some RF.
> So I turned to Gary KB8RQ, who as we know has the best ears in the
> Americas, who provided me his Map65rx file. That file records every
> decode in .txt format that Map-65 makes, as it looks over the complete
> frequency range and not just .127 where Gary can always be found making
> noise. Gary was kind enough to share his file which contained about 10000
> decodes and after converting it to Excel and removing duplicates, the
> grand total was 306 different station calls it decoded here in the US
> during the first contest weekend.
> It is possible there were some additional European stations that came on
> and left before the US Moon rise. If a big gun in Europe will provide me
> their file, I will add it to Gary's, after duplicates are removed and we
> will have the full total.
> Credit goes to W3SZ for the idea of parsing the file in Excel, as he did,
> when analyzing the performance of Map-65 vs WSJT.
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 18.104.22.168)
11/19 17:05 Why Larry .... they on 142 also? (VE3KH Kevin ON FN03aj 22.214.171.124)
11/19 17:06 They are calling me to get a contest poitn and it ain't gonna happen!! (W7IUV Larry WA DN07dg 126.96.36.199)
11/19 17:08 Thansk Larry 73 ... Yes, I have been jumped by a quite a few stations (VE3KH Kevin ON FN03aj 188.8.131.52)
11/20 17:47 Also hr k1jt calling me -22 but not ans him (KN4SM/5WL/KW Jerry VA FM16qt 184.108.40.206)
11/20 18:02 Contest = reduced courtesy! (K5DOG/2M Stevedog NM DM52xw 220.127.116.11)
11/20 18:04 Yes, K1JT and W3SZ can hear on gold tooth. (K5DOG/2M Stevedog NM DM52xw 18.104.22.168)
One thing I wouldn’t regret missing on EME is JAMMING!!!
GL 73, Petros SV3AAF
I have an SSB-gmbh 2m LNA, a 145-MHP
Here is what it does or doesn't do:
The LNA is mounted at the power-divider which is between two 15-element
LFA's. LMR600 runs down to the base of the AZ/EL Rotor. Hence it's 7/8
heliax to shack where some LMR600 comes into the window and to the K3
Take a 144.286 CW beacon. With LNA inline at the splitter up there, but
switched off, we copy the CW beacon about a 439.
Turn on the LNA and the noise level on the receiver rises maybe 5 db but
the signal completely disappears.
Furthermore when I watch the frequency area with the SDR/IQ I see and
hear a wavering, wide, string modulation like a warble or intermod. But
only with the LNA on.
So, another cw beacon which appears strong here can be heard through the
noise-rise when the LNA is turned on. The signal does not improve. But
if it was strong enough w/o the pre-amp on, it will be heard under the
gain of the LNA.
I called the guys I bought it from, they sent me to N4ATS who does the
official testing for the SSB-usa distributor/ He sent it back to me with
a kind note that it passed all gain and such tests on the spectrum
So if it's not the LNA, what am I doing wrong?
I have two zp files with both audio and jpegs showing the beacon with
and without the LNA, if anyone wants to see them
Bob KD7YZ EM88LL
Fellow 70 cm moonbouncers!
I will be QRV on the moon tomorrow morning from about 9Z to 11Z on 432.023
MHz calling CQ.
Anyone that wants a new initial are most welcome to call in. All others as
The declination is low but the path loss is good and the moon is in an
reasonably cold/quiet part of the sky. Expect some Faraday effects though.
Hope to see you there!
73 / Ingolf, SM6FHZ