At my new QTH in AZ, I'm in the process of laying out an enclosed operating room (not for surgeries but for my ham radio, hi, hi). It will be 320 sq ft & located inside a metal insulated 1500 sq ft workshop. I'm really excited abt finally having a comfortable room for a couple of different stations as well as test bench with various test equipment. The framing & exterior siding is planned to be done May 16-19. The electrical wiring will take place after that is completed.
I had an electrician here today to look at my sketches for location of various electrical outlets & a lighting plan consisting of several T8 fluorescent fixtures & several adjustable bullet lights.
I watched one You Tube video (think it was fm EU) which showed how some different LED lights caused interference which was quantitatively measured. Some bulbs caused no interference, some a moderate amount & some were vy high levels. The electrician said the newer T8 fluorescent bulbs use an electronic ignition similar to LEDs which causes me concern. He suggested an alternative approach of using several track lighting strips with halogen bulbs. I know they're not as efficient as LEDs or fluorescents but suspect they also don't generate interference.
So, my question for this group is what experience hv you had with LEDs, halogens, &/or T8 fluorescents generating interference in the HF, VHF, UHF & SHF spectrums?
Tnx & vy 73,
Bob, K6PF
Can anyone help with a data sheet for this device, Ive tried every Googling trick I know without sucess so far, hopefully there is someone out there smarter at it than me!
many thanks, Peter G3LTF
Pleased to work HB9Q today (of course!) but overjoyed to complete with
Gerard PA3BAT who is "just" running 500W to a 3.5m dish. For my 150W to 1
55ele this is a great achievent for Gerard, well done! Sadly I failed to be
heard by another station who had a much bigger dish so some of you need to
up your RX game to to match Gerard! :-)
I will be QRV tomorrow again on 1296, but 144 has been a waste of time due
to our poor rx performance and noisy site so we will not operating 144EME
again this trip. The 144 system is performing well on MS so stations within
Europe can try their luck with us.
73
John
I’m new to using dB for signal strengths and likewise.
I’m have a difficult time understanding a few terms as it relates to the software I’m seeing.
Right now, all of the software is connected to a funcube dongle pro+, MAP65 is getting it’s data from Linrad which is connected to the FCDPP and HDSDR is getting its data directly from the FCDPP.
WSJT10 is getting its signal directly from my array, via a TS-2000 and a Signalink with its RX level set at the 9 o’clock position and the windows level is set to 50%
Lets start with signal strength. Signals reported in WSJT and MAP65 are reported as dB, this report is relative to and represents??
The next is RX Noise in MAP65, I generally keep this around 23-25 dB. I’m assuming that signal strengths are related to this number, for example, my Rx Noise is say, 25 and a signal that I’m getting is 28 dB, then that is 3 dB below the RX noise, correct?
The next number is in specJT and the right most number, which is RX Noise. The current number is 10dB while the RX Noise is 28 dB in MAP65, how do these two relate?
The next numbers come from HDSDR currently I’m seeing right around –150 dB and when I take power away from the preamp, that drops to about –170 dB. How does this relate to, well, anything else?
The next question is how do all these numbers relate to the gain of my array, 2x2M9SSB’s which is around 14 dBd if I recall correctly.
Thanks for taking the time to read and helping out the new guy.
Brian KA7KDX
DN30SN
Just sent QSL to ZL2ADU. Thank you Harry.
As of March 31st the cost of mailing QSL has gone up to $2.50 for international mailing & to the USA $ 1.20 so please when you QSL direct I need an SAE & IRC or $.
I only QSL direct NOT via the bureau. Because of the low activity from Canada on WSJT I get a LOT of QSL. So please help me with it.
so I can continue to go to Costa Rica in the winter.
If you have send me a QSL direct & not received mine please get in touch with me.hopefully off the reflector.
Thank you
Serge VE1KG
Hi
Thanks to Ted, Mike and Armando for answer my questions.
The experience of you for sure is already helping me a lot.
Really two aspects looks me as the most relevant, that would be attenuation and noise.
As there are many trees in all directions, this will force me to put the antenna (4 meters dish 200 k without feeder) to at least 6 meters from the ground, to be able to stay above the wall among others.
As a function of the difficulty of installing such an antenna in these conditions, it was that let me to think before make a mistake in positioning.
Again I thank the help of experienced friends on the subject…and Here we go…
work to reach the moon!
Nelson
py2kxh(a)gmail.com
On 28/04/2014, at 00:30, Armando Bonilla <ti2aeb(a)gmail.com> wrote:
> Hi Nelson
>
> Regarding antenna obstructions, its a difficult matter, but I will write about it.
>
> Specially at UHF, like 1.2 GHz 23 cms band, if you have a dish, you have to consider the Near Field and Far Field obstructions.
>
> You will have problems if the obstructions are at the Near Field, which is distance= square root of ( d*d*d / wave lenght) *0,62 were d is diameter of dish, wave lenght is 23 cms
>
> So for a dish of 3.6 mts it becomes 8.8 mts. You cant have obstacles closer than 8.8 mts. For the far field at 2*d*d/wavelenght = 112 mts. That means that obstacles are not important, since the waves are open enough. On the Near Field, its like the waves travel with no dispersión, like in a rectangular. That is why its critical.
>
> If I were you, look the almost 9 mts clean; then also look obstacles between 9 and 102 mts. If you have high trees before the 102 mts, well look they do not cover the a cone that is opening from the Near End.
>
> Please look at "FRESNEL and FRAUNHOFER regions of antennas, look Obstructions to antennas. There you will find all about it.
>
> A tree is worst, it does not reflect, it "eats " the waves. Happy that antenna seldon is near no elevation
>
> 73
>
> Armando
>
> TI2AEB
>
>
> 2014-04-27 9:53 GMT-06:00 Nelson <py2kxh(a)gmail.com>:
> Hi to all EME enthusiasts
>
> let me introduce myself to the participants of this forum…my name is Nelson and my call sign py2kxh.
> My station is located in Embu-Guacu SP Brazil.
> I intend to start by the 23 cm band in EME, and I'm working hard on it.
> This topic interests me greatly, since I am studying the ideal position to put my first EME antenna (4 meters solid dish).
> I have many trees and a 30 meters tower blocking a good portion of the low horizon, also has a large amount of HF wire antennas
> 2 houses... a large garage on a plot of 1000 square meters only.
> Since space is limited and there are many obstacles, the correct positioning of the antenna is very important, so I'm one month studying this case.
>
> As Craig said .. But how much? Has anyone ever Performed or read about any quantitative analysis Regarding How much metal is TOO much?
>
> the answer to that question would be very useful to help me in choosing the best position for my antenna
> what are the main factors that I take into consideration to position my antenna
>
> thanks
> py2kxh(a)gmail.com
>
>
> On 27/04/2014, at 10:48, moon-net-request(a)mailman.pe1itr.com wrote:
>
> > Send Moon-net mailing list submissions to
> > moon-net(a)mailman.pe1itr.com
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> > http://mailman.pe1itr.com/mailman/listinfo/moon-net
> > or, via email, send a message with subject or body 'help' to
> > moon-net-request(a)mailman.pe1itr.com
> >
> > You can reach the person managing the list at
> > moon-net-owner(a)mailman.pe1itr.com
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Moon-net digest..."
> >
> >
> > Today's Topics:
> >
> > 1. Gs3pye/p update (g4bao)
> > 2. path obstructions (craig)
> > 3. Re: Stacking distance 4x9 DK7ZB (Dr. David Kirkby)
> > 4. EME 2014 registration (F2CT)
> > 5. EME 2014 (F2CT)
> > 6. Re: [Moon] EME 2014 registration (olivier MEHEUT)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sun, 27 Apr 2014 11:46:44 +0100
> > From: g4bao <john(a)g4bao.com>
> > Subject: [Moon-Net] Gs3pye/p update
> > To: Moon-Net <moon-net(a)mailman.pe1itr.com>, "moon(a)moonbounce.info"
> > <moon(a)moonbounce.info>
> > Message-ID:
> > <CAPtvDLUVZS0WSrmJ=bzEzqZcxAZgDhZUfRaW+zxct2oFMLCZXw(a)mail.gmail.com>
> > Content-Type: text/plain; charset="utf-8"
> >
> > Antennas up and tracking, problems with radio hardware and noise. Working
> > on it
> > Watch here for updates.
> >
After much chasing around trying to find noise sources, I got QRV on 23cms
and worked I1NDP, UA4HTS, UA3PTW and K2UYH/W1AW/2
Good achievement guys, considering my 150W and 55element Yagi. thanks!
If your station is "man enough" to match these 4 "Titans" please look for
me on 1286.011 JT65c (and CW on request) tomorrow. co-ordinate via HB9Q. We
also plan to be qrv ON 144MHz with 400W/17element at the same time
73
John
Hi to all EME enthusiasts
let me introduce myself to the participants of this forum…my name is Nelson and my call sign py2kxh.
My station is located in Embu-Guacu SP Brazil.
I intend to start by the 23 cm band in EME, and I'm working hard on it.
This topic interests me greatly, since I am studying the ideal position to put my first EME antenna (4 meters solid dish).
I have many trees and a 30 meters tower blocking a good portion of the low horizon, also has a large amount of HF wire antennas
2 houses... a large garage on a plot of 1000 square meters only.
Since space is limited and there are many obstacles, the correct positioning of the antenna is very important, so I'm one month studying this case.
As Craig said .. But how much? Has anyone ever Performed or read about any quantitative analysis Regarding How much metal is TOO much?
the answer to that question would be very useful to help me in choosing the best position for my antenna
what are the main factors that I take into consideration to position my antenna
thanks
py2kxh(a)gmail.com
On 27/04/2014, at 10:48, moon-net-request(a)mailman.pe1itr.com wrote:
> Send Moon-net mailing list submissions to
> moon-net(a)mailman.pe1itr.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mailman.pe1itr.com/mailman/listinfo/moon-net
> or, via email, send a message with subject or body 'help' to
> moon-net-request(a)mailman.pe1itr.com
>
> You can reach the person managing the list at
> moon-net-owner(a)mailman.pe1itr.com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Moon-net digest..."
>
>
> Today's Topics:
>
> 1. Gs3pye/p update (g4bao)
> 2. path obstructions (craig)
> 3. Re: Stacking distance 4x9 DK7ZB (Dr. David Kirkby)
> 4. EME 2014 registration (F2CT)
> 5. EME 2014 (F2CT)
> 6. Re: [Moon] EME 2014 registration (olivier MEHEUT)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 27 Apr 2014 11:46:44 +0100
> From: g4bao <john(a)g4bao.com>
> Subject: [Moon-Net] Gs3pye/p update
> To: Moon-Net <moon-net(a)mailman.pe1itr.com>, "moon(a)moonbounce.info"
> <moon(a)moonbounce.info>
> Message-ID:
> <CAPtvDLUVZS0WSrmJ=bzEzqZcxAZgDhZUfRaW+zxct2oFMLCZXw(a)mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Antennas up and tracking, problems with radio hardware and noise. Working
> on it
> Watch here for updates.
>
