Hello ,
I also want to thank Peter G3LTF for organizing this event.
I certailnly need more practice with my station as I am a builder more than
an operator!
There were plenty of signals !
Doppler is still a challenge I need to study this more to make better use of
random contacts calling CQ.
I heard and visualized (with waterfall and spectrum monitors) many CW
stations .
Since my ears and CW skills are poor (plus Doppler) I have avoided trying
CW for now.
I worked W5LUA with a very small station . my main target .
I hope to see more activity on 3cm as it is my main EME band. I have a new
TWTA and hope to mount it on the antenna soon .
73 to all!
Hope to see you again (maybe even CW and Circular POL!)
Jim WA3LBI FN20ji
2.4 m antenna
300w TWTA
30M of elliptical wave guide on TX
Kuhne Xverter - LNA
hi i got a request from Eddy ON7UN about if i planned any EME meeting
for 2017.
This meeting tends to active and hams that plan to be active on 432 &up
with main focus on CW EME and technics.
i have got some speakers already ON7UN and DL6SH we need more to make
this meeting possible , we cant just eat and drink beer :-)
I suppose Ingolf FHZ have some stuff=? Hannes PGP? Peter LTF Michael
YMK and so on and on we need a messurement department?
The calender says 19-21 May 2017 becouse -decl on moon, but i have
not check with the hotel. yet. as soon as i see that there are an
interest i will do premilary booking.
Thats all from now
73 cu
Lars SM4IVE
Hi LarsI could arrange NF measurments if needed.Gl73 HB9BBDDominique
Von meinem Samsung Gerät gesendet.
-------- Ursprüngliche Nachricht --------
Von: Lars Pettersson via Moon <moon(a)moonbounce.info>
Datum: 30.07.16 17:56 (GMT+01:00)
An: moon-net(a)mailman.pe1itr.com, moon(a)moonbounce.info
Betreff: [Moon] The Swedish 432 & UP meeting 2017
hi i got a request from Eddy ON7UN about if i planned any EME meeting
for 2017.
This meeting tends to active and hams that plan to be active on 432 &up
with main focus on CW EME and technics.
i have got some speakers already ON7UN and DL6SH we need more to make
this meeting possible , we cant just eat and drink beer :-)
I suppose Ingolf FHZ have some stuff=? Hannes PGP? Peter LTF Michael
YMK and so on and on we need a messurement department?
The calender says 19-21 May 2017 becouse -decl on moon, but i have
not check with the hotel. yet. as soon as i see that there are an
interest i will do premilary booking.
Thats all from now
73 cu
Lars SM4IVE
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Moon(a)moonbounce.info
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Subject: Re: [Moon-Net] Antenna Analyzers
Hello all,
I am also in a phase starting to tune up my OK1DFC septum placed in the 3m
RFhamdesign dish for 23cm.
I purchased VNWA from DG8SAQ some time ago, but have been a bit disappointed
to use it near its
range end point. To achieve some trustful and repeatable results was
neccessary to run lot of
measurements in a loop to reach an average value. There are various great
apps for the SW frequencies and for
checking my 2m rig it is great too. Lot of stuff to go through on VNWA Yahoo
group, but very little about
specific use in 23cm band.
I bought mini VNA Tiny antenna analyzer in addition, specified to run up to
3000 MHz and my first experience
tuning and measuring SWR of both septum ports looks very promising. The most
important moment will happen,
after finishing some cabling details, running the PA into the septum.
After hopefully successful testing I shall announce being QRV, guess till
end of August, if nothing would burn out.
73 Ivan OK1IL
------------------------------
Message: 4
Date: Fri, 29 Jul 2016 09:51:34 -0400
From: Curt Nixon <radio.ku8l(a)gmail.com>
Subject: [Moon-Net] Antenna Analyzers
To: moon-net(a)mailman.pe1itr.com
Message-ID: <0b7cb38e-1d89-5dbe-d05d-6be032b41881(a)gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Good Morning List:
I realize I need to obtain an analyzer in order to continue my
development in EME activities.
I have been looking at the SARK 110 which appears it will do pretty much
anything I need for a while.
I am slowly moving toward a set-up for 23cm and the SARK stops at 230MHz.
I plan to use a 3.5m TVRO mesh dish and build one of the square aluminum
tube feed assemblies. What type of instrumentation do folks use at 23cm
and above?
I wonder if I should step up and get something like the SDR-Kits DG8SAQ
VNA which covers up to 1.3GHz.
Or, are there other alternatives in that cost class?
Thanks for any thoughts,
Curt
KU8L
------------------------------
------------------------------
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Moon-Net posting and subscription instructions are at
http://www.nlsa.com/nets/moon-net-help.html
End of Moon-net Digest, Vol 272, Issue 16
*****************************************
Hello 3cm EMEers
I appreciate the following stations providing QSOs with W5LUA. OZ1LPR,
G3WDG, HB9Q and OK1KIR provided signals that impressed many attendees at the
Central States VHF Society conference in Rochester, MN. All JT-4F signals
provided many audible signals.
We plan to sked WA3LBI on JT-4F on 10368.050 at 1200Z and will look for
other signals on .050 after this schedule. Please do both receive and
transmit Doppler freq correction as I will be transceive on 10368.050 MHz.
If no signals are seen, I will QSY to .100 to work some folks on cw for the
Dubus 3 cm activity weekend.
Thanks to all.
73
Al W5LUA EN34sb
hi
i am sorry to say the output of the beacon is unstable between 2 and 25
w.if it becomes more worse, i had to switch down the beacon for a while
because there is no time for repare this moment.
vy 73 per dk7lj
Dear hobby fellows,
I have no experience with feeds and dishes (yet). Neither with other (software) antenna analyzers.
But I am using a DG8SAQ VNA for some years now. A Smith Chart is a standard feature on it.
Have done measurements with it on 1296 with no problem. Be aware that the noise floor is higher than on "real" network analyzers.
Real "deep" measurements will get difficult. But how often does one need that in our hobby?
For me it took some time to learn how to use the many features on the VNA, but can't do without it anymore.
73, Peter PA2V
-----Oorspronkelijk bericht-----
Van: Gary K Reed [mailto:gary.reed@sbcglobal.net]
Verzonden: vrijdag 29 juli 2016 19:28
Aan: Nando Pellegrini; moon-net(a)mailman.pe1itr.com; Edward R Cole
Onderwerp: Re: [Moon-Net] Antenna Analyzers
Though I have never (yet) tried tuning a septum feed or the like with a VNWA, I do tune patches all the time. You can easily see circularity on the Smith Chart. The Impedance curve has a loop in it at resonance. The peak of the loop is the resonant frequency. If it is linear there is no loop per se, maybe a big circle.. The smaller the loop the better the axial ratio. This also means better efficiency and gain. Does this help as much as checking with our antenna ranges? No, but it is a very good start. and can be done at home, too. This also worked on cross dipole antennas though the bandwidth is wider so there are loops, not loop. BTW: I did one time check a helix I made. Due to the bandwidth being quite large, there was loop upon loop upon loop. The smaller all the loops were, the better the axial ratio.
Maybe someone else here has more information on the septum feeds. But, I doubt they are much different. The phase reversal necessary for circularity probably still shows up on the Smith chart.
Gary WE9Y
--------------------------------------------
On Fri, 7/29/16, Edward R Cole <kl7uw(a)acsalaska.net> wrote:
Subject: Re: [Moon-Net] Antenna Analyzers
To: "Nando Pellegrini" <i1ndp.nando(a)gmail.com>, moon-net(a)mailman.pe1itr.com
Date: Friday, July 29, 2016, 12:30 PM
I used 5w into Tx port and directional coupler with HP432 as indicator. With that I determined my return loss >30 dB and isolation was 23 dB on my W2IMU feed horn.
I used sun noise for optimizing feed position and found little change over about +/- 10cm of the focal point on 1296. I did not check circularity as feed was already built and tuned when I got it (estate of K1RQJ).
Not QRV 23cm as still working out bugs on digital encoder display since installing it in my control panel (wiring faults??).
73, Ed - KL7UW
At 07:48 AM 7/29/2016, Nando Pellegrini wrote:
Hi
All,
Imho i would not spend money for a network analyzer and if you really want there are cheap solution with a noise generator and a directional coupler.
I believe that the main problem for achieving good result with a dish and for EME purposes is to provide the right illumination of the dish surface which means choose the proper feeder for a given F/D ratio.
The network analyzer does not help at all and it is not useful also if you try to check the circularity of the polarization once you built the feeder.
A good swr meter will give you results on proper impedance matching while i used a fixed signal from a nearby linearly polarized beacon and then checked the variance of the signal by rotating the feeder connected to a spectrum analyzer.
Nothing more than that.
I wish you good results and hope to catch you out of the moon.
73,nando i1ndp
On 29.07.2016 16:14, James C wrote:
Hello all,
Great question that I've wanted to get opinions on myself,
If you're planning to respond, Would you mind replying to Curt's email on the reflector or CC me to it? Thanks you, .-James KE7KQA
On Fri, Jul 29, 2016 at 6:51 AM, Curt Nixon <radio.ku8l(a)gmail.com>
wrote:
Good Morning List:
I realize I need to obtain an analyzer in order to continue my
development in EME activities.
I have been looking at the SARK 110 which appears it will do pretty much
anything I need for a while.
I am slowly moving toward a set-up for 23cm and the SARK stops at 230MHz.
I plan to use a 3.5m TVRO mesh dish and build one of the square aluminum
tube feed assemblies. What type of
instrumentation do folks use
at 23cm
and above?
I wonder if I should step up and get something like the SDR-Kits DG8SAQ
VNA which covers up to 1.3GHz.
Or, are there other alternatives in that cost class?
Thanks for any thoughts,
Curt
KU8L
_______________________________________________
Moon-Net posting and subscription instructions are at
http://www.nlsa.com/nets/moon-net-help.html
_______________________________________________
Moon-Net posting and subscription instructions are at
http://www.nlsa.com/nets/moon-net-help.html
_______________________________________________
Moon-Net posting and subscription instructions are at
http://www.nlsa.com/nets/moon-net-help.html
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubususa(a)gmail.com
-----Inline Attachment Follows-----
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Hello
In final 144 unit of the TS790 we find two pin diodes
One UM9401 and one M1308
On my TS790 the M1308 diode is dead (short circuit)
Is it possible to replace it by a UM9401 ?
May be any 1N4007 will do the job ?
Many thanks for your help.
73’s
Marius F8DO
Hello
In final 144 unit of the TS790 we find two pin diodes
One UM9401 and one M1308
On my TS790 the M1308 diode is dead (short circuit)
Is it possible to replace it by a UM9401 ?
May be any 1N4007 will do the job ?
Many thanks for your help.
73’s
Marius F8DO
