[Moon-net] Fwd: Fwd: EME weekend on 24GHz_March 9, 2008

[Paul Chominski]

Congratulations to ALL 24 GHz stations !!
GL 73 Paul WA6PY

----- Original Message ----- 
From: <vladimir.masek at volny.cz>
To: <moon-net at list-serv.davidv.net>; "Rainer" <moon at moonbounce.info>
Sent: Monday, March 10, 2008 4:54 PM
Subject: [Moon-net] Fwd: Fwd: EME weekend on 24GHz_March 9, 2008


> Many thanks to all
> who participated in the great weekend party on 24GHz EME !
>
> OK1KIR finally got on the board completing the rig after 4 yrs (hi)
> and contacted all stns available on Sunday, Mar09:
> 11:03 UT  24048.100 MHz  OK1KIR - DF1OI   O/O
> 11:34 UT  24048.100 MHz  OK1KIR - DK7LJ   O/O fb
> 14:01 UT   24048.200 MHz OK1KIR - LX1DB   449/449
> 16:01 UT   24048.100 MHz  OK1KIR - W5LUA  O/O --> 549/449
> 17:06 UT  24048.150 MHz   OK1KIR - VE4MA  O/O
> We are really happy for each one contact, especially mentioning the
> first OK-LX and OK-VE QSOs.
> Rotating the feed (LP) showed low influence (as perceived, not
> measured) except approx. +/- 10 ...15 deg from quite deep minimum at
> perpendicular polarization. Signals showed frequency spreading from
> about 100 Hz up to 200 or 300 at maximum on Spectran waterfall. Very
> clean (narrow) signal during QSO with DK7LJ and later on quite clean
> from LX1DB and especially from W5LUA. RX CW bandwidth about 1 kHz was
> optimum for most of signals during the day.
> Sun was 14.8dB morning at 09:00 UT (lightly cloudy) and 14.4 dB
> afternoon at el 43deg (more cloudy). Respective Moon noise was approx.
> 1.95 dB in both cases. Noise ratios were measured to close sky (not
> searching for maximum in the couldest sky like few weeks ago).
> Antenna beamwidth slightly over 0.2deg (hard to measure on noise
> sources of 0.5 deg size). Moon tracking F1EHN with incremental steps
> of 0.02 deg was used to point the beam to the Moon centre (tested every
> 10...15 min with small but necessary corrections). Changes less than
> +/- 0.02 dB in Moon noise when rotating the rig focus gear.
> OK1KIR 24GHz rig:
> Primary solid dish 4.5m, horn feed - linear
> polarization+ transverter+TWT/PS all in the focal point  and rotable
> over +/-90deg.  LNA DB6NT 1.5dB (not measured), rf pwr about 20W (not
> measured precisely as each one piece of WG or transition swallows 0.5
> dB or more. Two WG switches in series  after TWT (continuously powered
> up) with proper sequencing to safely operate LNA.
> We are ready for anybody else interested in tests, just send e-mail in
> advance !
> We preliminary agreed with Per, DK7LJ to be QRV on 24GHz on the
> Saturday, Mar15 afternoon during the DUBUS contest. Anybody else
> interested to arrange (agree) a time window on 24 GHz during the contest
> ?
> Vy 73s,
> Vladimir, OK1DAK for OK1KIR
>
>
>
>
>
> _______________________________________________
> Moon-Net posting and subscription instructions are at 
> http://www.nlsa.com/nets/moon-net-help.html
>