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.
I’ve been a ham now for about 35 years, but from age 22 to 43 I was inactive. I’ve since gotten back in, enjoying the new digital modes, specifically jt65. I’ve been slowing putting the pieces together for a qrp eme station with the following:
TS-2000 no mods
2x2m9ssb’s in vertical polarization (I’d like to work sats as well)
I’m planning on building a 8’ wooden tripod for the antenna’s with the 5030g as close to the antenna as I can get it, most likely it will be in a weatherproof container at the base of the tripod.
My run to the antenna is going to be 125-150’ from the rig. It has been suggested from other forums, that no less than LMR400 line will be acceptable for the run.
Will I need/would it help to have an additional preamp at the antenna, bypassing the preamp in the 5030?
Will a 440mhz antenna between the two 2m beams cause any issues?
What rig control software is advised? Linux/Windows?
Where can SDR, like a RTL-SDR, Funcube dongle for separate recieve or Flex 1500 with a transverter play a part?
At ~300 watts is it advisable for a relay to bypass a separate preamp should it be desirable to bypass the mirage 5030 preamp?
Does anyone have any procedures/links for graphing/mapping ambient noise such as garage door openers, microwave ovens, small children and HOA spies?
What other questions should I be asking?
I had the exact same problem with the Lorex brand cameras!
---------------------------------------------------- Message: 1 Date: Mon, 30 Dec 2013 15:49:32 -0500 From: Subject: [Moon-Net] Video Camera noise To: "moonet" Message-ID: Content-Type: text/plain;charset="utf-8"; format="flowed" Hi All, I was unable to copy eme signals for two weeks. I spent the last two weeks working on my 2m array. I changed out the mast mounted preamp and H/V remote switch as well as several LMR 600 cables to no avail. I could copy the clubs 5w beacon from 50 miles away but no eme signals. Preamp was showing 25db of gain and H/V switch was working. Today I got out the old Elecraft transverter and put it on the other Flex 5000 and computer with different instance of wsjt. Same thing. The only thing I changed in two weeks was a new mast mounted camera since the old one got water into it and froze. I pulled power off it and lo and behold eme signals. Camera had 20db of noise on 2m. It now has a switch for 12v and is only used for aiming when needed. Rx in Map65 showed the difference and was a useful tool. Wsjt did not. Hope I helped someone. 73 es gl, Paul, wa3qpx
I am looking for some 2.3ghz eq.
Down converter.exciter, pa,
Please state type, condx, price, specs.
I will answer your listing not on the
MB Mail, but on your E Mail address.