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 ...
Pete WA2ODO
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Sri I made, at least a mistake, I send it again.
Hi all,
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
JT65.
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:
*Self Doppler
+3KHz
*DX Doppler
-2KHz
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:
*Me
TX: 1296.070 -1.5KHz = 1296.0685MHz
RX: 1296.070 +1.5KHz= 1296.0715MHz
*DX
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
partner:
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
Doppler magnitude.
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.
Juan Antonio
EA4CYQ
Its been awhile since I have been QRV with my 2m-eme station.
Four independent problems in my transmission line during the winter
kept me off the Moon and then my HVPS acted up. Well it turned out
to be a simple problem but it didn't appear that way. My 4kV dropped
to 2.8kV without a load. I envisioned all kinds of problems but in
the end it was simply a blown HV fuse. It did not blow open but
instead went to 16meg-ohm which was enough to drop the HV with very
low current being drawn by the HV panel meter.
Having no replacement fuse, I decided to remove the HB fuse holder
from the HVPS since changing the fuse required removing the 8877 deck
from the rack to gain access thru the HVPS top plate which is
directly under the amplifier. I will order some more HV fuses from
Nebraska sales ($25/ea.) and make an inline HV fuse box which will be
much quicker access to replace a fuse. Actually, I have only blown
two of these fuses in 8-years of running.
How I blew this one is that the 6-dB attenuator that I was using to
lower drive to my transverter to keep drive below 50w to the 8877
failed in short resulting in over 100w drive to the 8877. Anode
current spiked taking out the HV fuse as it is designed to
do. Probably hit over 2kW output!
A couple other improvements will make recovery from HV events
quicker: I brought the 240vac mains fuses to the front panel of the
HVPS and increased them to 20A. And I added a vernier to the 8877
drive input cap. Looks like I got a finer tune on the input as it is
taking less drive to reach 1200w.
I will be QRV Sunday from about 1400utc to 1700utc (Moonset):
144.116, 1st for CQ and on N0UK logger. Mon> I will be trying to
work 6W/PE1L in Senegal very early in my morning. We only have about
30-min common Moon on Monday but this increases on subsequent days.
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubususa(a)gmail.com
Hi everyone
HB9Q (JN47cg) will be QRV coming weekend November 8th 17.45z (our moonrise) until November 9th 08.30z (our moonset). Depending on activity we may take a break for a few hours on November 9th early morning hours.
50 MHz: 1x11y, preamp, no elevation
We will do moonrise and moonset. We will be QRV up to 22° el and start at 22° on moonset.
We will announce our frequency on ON4KST EME chat.
144 MHz: 15m dish 1KW
We will do the full window, announcing our frequency on N0UK on a regular base.
432 MHz: 15m dish 1KW
We will do the full window, announcing our frequency on HB9Q 432 logger on a regular base.
1296 MHz: 10m dish 1KW
We will do the full window, announcing our frequency on HB9Q 1296 logger on a regular base.
23xx/3400 MHz: 10m dish 100W
We can be QRV 13 and 9cm on request. Please contact us on HB9Q 1296 logger.
Obviously we are NOT participating in the contest. Our aim is to provide HB9 to all needing it for the contest and we hope to work new initials and have fun. Good luck finding our signal. QRP stations are VERY welcome!
We wish all a lot of fun and a successful EME weekend!
Vy 73, Dan HB9Q JN47cg
Ghislain,
OK. When I open the attachment my computer asks what program I wish
to use for that. I chose wordpad which opened the file as a txt
document. I saved it to upload to NOVA.
thanks,
Ed - KL7UW
At 08:17 PM 11/13/2014, Ghislain RUY wrote:
>Hello
>Just change tce for txt.
>I am writing the final blog section. Also compiling the data that
>were sent by mail, preparing certificates, qsl, contest results....
>
>73 LX2RG
>
>
>
>------------------------------
>On Fri, Nov 14, 2014 1:19 AM CET Edward R Cole wrote:
>
> >At 05:24 AM 11/13/2014, Ghislain RUY wrote:
> >>Dear All,
> >>
> >>please find attached the latest TLE for 4M.
> >>
> >>It is obtained using an accurate Doppler fit and should do for some months.
> >>
> >>4M may awaken from time to time and there is the possibility that it
> >>gets enough sun to stay powered for a long time due to Earth's orbit
> >>and inertial properties of the attitude of the last stage.
> >>
> >>Thanks again to all.
> >>
> >>(pse: if thi smail does not go trhough the moon.net list, pleas be
> >>kind enough to push it)
> >>
> >>Ghislain, lx2rg
> >>
> >>
> >>
> >>_______________________________________________
> >>Moon-Net posting and subscription instructions are at
> >>http://www.nlsa.com/nets/moon-net-help.html
> >
> >Thanks Ghislain,
> >
> >The .tce file format is not familiar and my computer finds no
> >programs to use. I wonder if a .txt version could be provided in the
> >2-line NASA format? NOVA accepts eight .txt or .dat file formats for
> >keps. I'd like be able to check for activity, on occasion.
> >
> >Did you write a final blog recapping the 4M mission?
> >
> >
> >73, Ed - KL7UW
> >http://www.kl7uw.com
> > "Kits made by KL7UW"
> >Dubus Mag business:
> > dubususa(a)gmail.com
> >
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubususa(a)gmail.com
Hello All,
Please have a quick look at this:
Shin'en is a space probe to be launched in Japan this Friday.
Shin’en 2 IARU coordinated frequencies:
• 437.505 MHz CW beacon
• 437.385 MHz WSJT telemetry **************
• Inverting SSB/CW transponder Note: it is now understood that due to regulatory issues the transponder will not be operational
– 145.940-145.960 MHz uplink LSB
– 435.280-435.260 MHz downlink USB
Similar project from China, a lunar flyby with a ham radio payload transmitting JT65B mode on 145.990 ==
MHz is expected to take place toward the end of this year, giving earthbound radio amateurs the opportunity to ==
receive some otherworldly DX signals as the payload flies around the Moon. ==
China has announced plans to launch a lunar orbiter carrying a 14 kg battery-powered payload known ==
as 4M-LXS, which was developed at LuxSpace. Signals from the Amateur Radio payload can be decoded using ==
the free WJST software.
and this
http://moon.luxspace.lu/blog/ ( 4M-LXS )
73 Rein W6SZ
Dear all,
I just got sad news through UA3TCF, about the passing of our good radio
friend RA3LE (ex-UA3LBO).
We have lost another great VHF-UHF-SHF pioneer.
Rest in peace dear Valery!
Dick PA2DW
1296-eme Status:
I'm still working on getting the 150w PA QRV in time. Unfortunate
mistake blew one of the surface-mount 22uF electrolytic's
(replacement was shipped yesterday so may arrive in time). DC test
looks good otherwise; RF test must wait for the cap. I am proceeding
with all the rest of the installation in the meantime so minimum
effort will be needed once I can make the RF tests and adjustments
for max RF. I expect to have 100w at the feed, but no margins for
error are left. Hope to add some photos, here:
http://www.kl7uw.com/1296-300PA.htm
144-eme Status: QRV with 1300w - MAP65
I'll post final status and contest plans toward end of this week.
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubususa(a)gmail.com
