Is this a good time for EME comm. ? Moon seems right for it , but never tried it . Is psk31 possible ? What freq. ? Orbitron says 145.000 ? Going to send cq throughout the day via PSK 31 on 145.000. Maybe a waste of time .
Jerry WB5LHD
JT65B is what is commonly used on both 2 meters and 432 MHz, however many stations use CW as well. In the microwave bands, with a large station, SSB is possible.
Search for the WSJT program and I'm sure you will find lots of information. The frequency range commonly used is the lower portion of the 2 meter band, below 144.200.
Moon bounce with circularly polarized satellite antennas is not very easy as almost all EME stations use either horizontal or vertical polarization, so using circular polarity will add additional loss, although I have made a couple of 432 EME contacts with my M2 circularly polarized antenna and just 50 watts from my TS-2000. However those contacts were with some very big big-guns, but don't let that discourage you!
73 de Sebastian, W4AS
On Jun 4, 2011, at 1:37 PM, jerry wrote:
Is this a good time for EME comm. ? Moon seems right for it , but never tried it . Is psk31 possible ? What freq. ? Orbitron says 145.000 ? Going to send cq throughout the day via PSK 31 on 145.000. Maybe a waste of time .
Jerry WB5LHD
At 09:37 AM 6/4/2011, jerry wrote:
Is this a good time for EME comm. ? Moon seems right for it , but never tried it . Is psk31 possible ? What freq. ? Orbitron says 145.000 ? Going to send cq throughout the day via PSK 31 on 145.000. Maybe a waste of time .
Jerry WB5LHD _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Jerry,
By your questions it appears you are interested in finding out more about eme (Moonbounce) but do not know very much about it.
On 2m eme is conducted in the 144.030-144.100 sub-band for CW, and on 144.100- 144.160 for digital eme. Psk-31 is not used and not really suitable. A mode called JT-65 is used for digital eme. It is a narrow-band FSK mode using software and computer soundcard to drive a SSB 2m radio. An excellent article on eme is in the current ARRL Handbook written by Joe Taylor, K1JT, author of JT-65. This will answer many of your basic questions on what eme is and how to get started. http://physics.princeton.edu/pulsar/K1JT/ http://www.n1bug.net/operate/emebasic.html http://www.vhfdx.info/jt65bintro.html
One cannot decide today I am doing eme. Where do I transmit?
If you have a good satellite or terrestrial 2m yagi and at least 150w you have the basics to start. But there is a lot to learn before one should expect to work eme. There is the basic station setup. Tracking the Moon. Frequencies and procedures used. As you get into it quite a bit to coming up the learning curve. Give yourself at least a couple months to accumulate this knowledge so you are better equipped to try eme.
Consider subscribing to the Moon-Net e-mail reflector: Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html
73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-testing*, 3400-? DUBUS Magazine USA Rep [email protected] ======================================
Jerry, If you're JT65 capable, monitor http://www.chris.org/cgi-bin/jt65emeA to find out who's transmitting where. I can copy the big guns with my meager setup. 73 Glenn AA5PK
----- Original Message ----- From: "jerry" [email protected] To: [email protected] Sent: Saturday, June 04, 2011 12:37 PM Subject: [amsat-bb] moon bounce
Is this a good time for EME comm. ? Moon seems right for it , but never tried it . Is psk31 possible ? What freq. ? Orbitron says 145.000 ? Going to send cq throughout the day via PSK 31 on 145.000. Maybe a waste of time .
Jerry WB5LHD _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
145.000 is not a good choice of frequency. It is a repeater input frequency.
On 04-Jun-11 17:37, jerry wrote:
Is this a good time for EME comm. ? Moon seems right for it , but never tried it . Is psk31 possible ? What freq. ? Orbitron says 145.000 ? Going to send cq throughout the day via PSK 31 on 145.000. Maybe a waste of time .
Jerry WB5LHD _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (5)
-
Edward R. Cole -
Glenn AA5PK -
jerry -
Nigel Gunn G8IFF/W8IFF -
Sebastian, W4AS