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 heve :
3 meter Dish Reflector Kit. (also avaiable on request other Diameter)
307 CM DIAMETER F/D RATIO 0.4
The Kit includes:
16 Ribs pre-assembled
8 Angular reinforcement structure
1 Central Drum
1 Attack must (dia. 45 mm approx. – innocents-)
5 Tube Ø 16 mm shaped for the circumference.
All the necessary mounting hardware (all INOX)
All parts are numbered and the entire structure is easily assembled.
For mounting serve three keys: 10, 13 and 8.
The whole structure is made of anodized aluminium avio anti-corodal.
All hardware is STAINLESS steel.
The weight should be around 20/30 Kg (a person can hold it alone)
Once assembled it remains only to apply a mesh (not included in Kit) which
vest more befitting to the frequency on which will be working the parable,
keeping in mind that we can say that the length of the side of the mesh
shall be at least one-tenth of the wavelength of the lowest frequency
(example. 1296 MHz wavelength at least 23 cm knit 2,3 cm). A good
compromise may be from 1.2 cm that is what I have installed on my parable,
who works on 432 MHz 1296 and 2320 with excellent results.
The price is 850.00 euro(excluding shippingcosts),
taking into account the type of materials used
and the workmanship, and also taking into account that a German firm
producing a specimen like this and wants to € 1400.00!!!!
Just for news I built many kits from this dish and I personally tried
with great satisfaction via Tropo 432-1296-2320 MHz and 1296 Mhz EME,
representing that every subsequent construction are applied to minor
On request I can provide support for elevation, support for feed (depending
on what you decide to use) and feed.
On request sending other photos via email.
Anyway almost identical to this: http://digilander.libero.it/iz0cls/
Or watch this video: https://www.youtube.com/watch?v=Fxqs7mtuT-A
If you or someone of your friend is interested
Contact to: fabrizio.iz0cls(a)gmail.com or iz0cls(a)libero.it
73 to All! de Fabrzio IZ0CLS
Hello friends It is confession time
A good friend of mine recently reminded me what makes a JT QSO a VALID QSO. Lately I have started focusing on small stations or at least smaller than my station. & am having great fun.
I also have noticed more & more I am getting on MY CQ this ve1kg XXXX OOO to which I responded a few time with RO & then 73 that is NOT a valid QSO. What needs to be done is that BOTH calls are sent by each STATION. So i should have sent instead of RO? the following
XXXXX VE1KG OOO then i should have received RO I was the station calling CQ. The reason than small stations do this is simply because it easier to decode RO'S than XXXX VE1KG OOO
I know this has been covered By Lance W7GJ for 6M but it also makes a lot sense for 2M if you are face with that situation. It is just a reminder to the NEW stations, that we are getting in the DX EXPEDITION season & to respect the protocol.
I will also stop sending RO'S WHEN I CALL CQ. Also thank you to my friend to remind me of the protocol which I have somehow ignored at times
I'm now active on 2m EME since 2004 and I still need for my 2m WAS only
As I see in those 3 states is very low to completely non EME activity -
maybe this is a hint for a small inside U.S. DXped for one or some of
you American guys ?
All sked arrangements for those listed states are very welcome - I hope
to complete the WAS someday. ;-)
Member of the Team of MMMonVHF
On Saturday September 26 PI9CAM will be active again!
Starting approx. 20.00 UTC for the ARI contest.
End depending on activity...
25 m Dwingeloo dish
23 cm: 120 W @ feed
70 cm: 400 W @ feed
CU off the moon!
73 from the PI9CAM team
I am running for a couples off weeks 2 programs wsjt (H and V-pole)
under windows 10 at the same time on one computer..
No problems at all and all is working.
What is the diiference between XP and windows 10 when you are using a Delta
44 sound card ?.
Is there a difference at the RX in DB.s when you switch from XP to windows
I am using the Delta 6-0-8 driver for the Delta 44.
I want also run Map 65 on a other computer under windows 10 (now running it
For map 65 i am using a IQ+.
Will it give me many problems and what about the RX ?.
For Map 65 i use also a Delta 44 soundcard.
What i want to know , is my RX better under XP than running under WIndows
73 GYS PA1GYS
I need the following states for the WAS:
** AL ALABAMA
** CT CONNECTICUT
** HI HAWAI
** LA LOUSIANA
** RI RHODE ISLAND
I think K2P was working from FN20 NJ. Please anyone could confirm if K2P was
working via 144 EME from Rhode Island?
Last week I was glad to work two neo states:
- N0IRS JD congratulations for your new setup from Missouri
- KB7Q/0 Gene from Iowa, very nice setup, quick QSO and strong signals from
Come on! With new states in portable.
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