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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Any of you have a FT 991 for radio. according to what I read it does not required an Interface for digital work which include WSJT X. It has a soundcard but where is the interface????
I am considering a mobile radio which I can carry around easily like a FT857 or a FT991.
Please give me your comments & suggestion off line.
Thank you very much
I have a plan
I would like to apply, but step py step for EME of new stations .... I wld
like apply 6m & 70cm & 23cm ... the question what the first band I start ?
from above I have just ft-2000d & ft857
On 25 Jun 2016 1:01 p.m., <moon-net-request(a)mailman.pe1itr.com> wrote:
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> Today's Topics:
> 1. QRV 144 eme (Mike White)
> 2. Re: KL6M EME Reborn (Bob McCormick W1QA)
> 3. Re: 1296MHz Scalar ring on small dish. Good or no good? (Andy)
> Message: 1
> Date: Fri, 24 Jun 2016 22:35:56 +0000 (UTC)
> From: Mike White <k7uls(a)yahoo.com>
> Subject: [Moon-Net] QRV 144 eme
> To: "moon-net(a)mailman.pe1itr.com" <moon-net(a)mailman.pe1itr.com>
> Content-Type: text/plain; charset="utf-8"
> I will be qrv this weekend starting tonight 144Mhz with 2x12 350w full
> az/el will post to N0UK for freq and seq.de K7ULS
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.
The 432 _& UP EME for _Dinosaurs
Today i confirmed the Scandic Hotell Offer all is set there was
a*very *litle prize adjustment compared to 2015.
webb will be updated tmrw i hope. with all info. such as agenda (part of
Some plans are underway and it might be some change from previoues
lars SM4IVE EME 2017
*CW is Still the King!!!!*
The wonderful EME 2016 conference is still very much on our minds.
That motivated us to move fast for EME 2018.
We can tell you that the EME 2018 conference will take place at Hotel Zuiderduin in Egmond aan Zee (the Netherlands).
Dates will be August 16, 17, 18 and 19.
Thursday August 16:
Excursion by bus: Dutch waterworks.
This trip will be interesting for all as there is quite some technique involved in keeping our country dry and those waterworks are both impressive as well as beautiful!
Friday August 17:
Excursion by bus: to PI9CAM
We will visit the 25 m Dwingeloo dish (PI9CAM) but also the 14 dishes (25 m too) of the Westerbork array.
Thís trip will be interesting for all too, because this trip will be organised in such a way that:
a.. interested EME-ers have time to spend time at the big dish of PI9CAM and the 14 dishes of the Westerbork array;
b.. for partners (who are invited as well!) the visit at the dishes will be shorter and on both locations there will be time to visit other things.
Saturday August 18:
for the EME-ers: in the morning and afternoon: Lectures
for partners: Excursion by bus ‘Typical Dutch’
For all: Closing dinner in the beach-pavilion on the beach!
Sunday August 19:
for the EME-ers: in the morning: Lectures
for partners: Trip in and around Egmond aan Zee.
For all (around noon): Goodbye Lunch - an extended lunch for all to say our goodbyes.
Looking forward to see many of you in the Netherlands and at PI9CAM in 2018!
PA3FXB (team PI9CAM)
Still having efficiency issues with my K2RIW amplifier. I can get 500W out in Class C, but I seem to be stock at about 45% efficiency, which would be OK for AB1 but is low for C. I've tried cleaning and polishing the output stripline, the fingerstock connectors, double checked the RF chokes and tuning and loading flaps, but no significant improvement. One thing I do notice is that the output coupling flap is just about at the end of it's range (minimum capacitance - maximum distance from the stripline) using the original dimensions. I tried making it slightly smaller, but that didn't improve things either.
So I'm thinking of maybe going for fresh tubes to replace the current ones which were used and pulled from service sometime back in the 1970s. I'm wondering what a fair price these days would be for a pair of 4XC250R tubes, "new old stock", made 20+ years ago. They are hard to find, so I'd like to get a ballpark figure of what they typically sell for in case I find some and need to make a quick decision. I resume they sell at a premium over the 4CX250B, which seem to go for anything from $50-$200 each on ebay depending whether they were made in the USA, Russia or China!
Maybe new tubes won't improve the efficiency, but it might be worth a shot. 500W out is OK, but at only 45% efficiency I'm pushing my Variac and power supply quite hard and I'm getting close to tripping the 15A braker on my 120v line...