Subject: NET NOTES JUL 14 2002
From: K1RQG
Most recent Schedules can be found here
Also submit your sked requests to Joe:
Joe, K1RQG
NET BEGINS
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***** PLEASE READ!!!! I APOLOGIZE TO THE RECIPIENTS OF THE "NET NOTES" FOR ****
***** NOT BEING PROMPT AND UP-TO-DATE. W1ZX IS IN MAINE HELPING ME TO REPAIR ****
***** MY DAMAGED DISH, AND I MUST WORK ON IT WHEN I HAVE TIME. MY JOB ALSO ****
***** IS CONSUMING A LOT OF MY TIME. THERE ALSO IS LOW NET PARTICIPATION, AS ****
***** USUAL DURING THE SUMMER MONTHS. IF THERE IS SOMEONE OUT THERE THAT ****
***** WOULD LIKE TO TAKE OVER THE NET AND SCHEDULING (VERY FEW SKED REQUESTS) ****
***** PLEASE LET ME KNOW. AS SOON AS REPAIRS ARE COMPLETE, I HOPE TO CONTINUE ****
***** AS NET CONTROL. THANKS FOR YOUR UNDERSTANDING. 73 DE JOE K1RQG ****
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Subj: 23 CM Activity weekend report
Date: 7/13/02 2:32:42 PM Eastern Daylight Time
From: [email protected] (k0yw)
Reply-to: [email protected]
To: [email protected] (Joe Demaso), [email protected] (Al Katz)
Hi Joe, Well, I snuck out of some domestic chores and was able to get on
for an hour. Echoes were good tracking was perfect under zero moon
visibility condux. I worked 11 stations in a little over an hour
including: F6KHM (SSB) 55/57 If he is at his own station, it would be
#123 initial. He said he was using 100W to a 10M dish and an IC-746 as
an IF. A good QSO. Also worked: WA6PY 549/449, F1ANH 539/559, N2UO
539/559, DL1YMK 548/559, W2UHI 569/589, DF4PV 579/579, K9BCT 569/579,
W7SZ 549/559, OE9ERC, 589/599 and F2TU @1800Z 55-6/56 Nice SSB. Heard
K5JL, K2UYH, and IK3COJ but had to go QRT or get a big stick! Good luck
on the antenna stuff! 73 Bruce
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Subj: 47 GHz Antenna Tests
Date: 7/13/02 9:33:51 PM Eastern Daylight Time
From: [email protected] (Barry Malowanchuk)
To: [email protected] (Microwave), [email protected] (Joe K1RQG), [email protected] (Sergei Joutiaev)
Hi Joe, Sergei & All,
I have been busy performing 47 GHz Sun Noise Tests in recent weeks and comparing
notes with Al W5LUA, Gary AD6FP and Will W0EOM. There are not many people
looking at sun noise or even capable of doing so at this frequency. There is a real
shortage of large antennas rated for this frequency.
Measurements were taken using 1, 2, 3, 4, 6, 8 and 10 ft dishes and all receivers
are believed to have Noise Figure of about 4.5 dB. Cold sky to ground measurements
are about 1.3 dB using the feedhorns alone
Here are the Sun Noise results:
W5LUA 15 " Prime Focus 39 GHz Dish 1.4 dB Sun Noise
VE4MA 30 inch Offset Metal 2.4 dB
W5LUA 24" Prime Focus 39 GHz Dish 2.5 dB Sun Noise
VE4MA 4 ft Offset Plastic dish 3.6 dB
W0EOM 2 ft dish 4.1 dB
VE4MA 6 ft Offset Fibreglass dish 5.0 dB
AD6FP 3 ft Precision (95 GHz) dish 5.2 dB
W5LUA 10 ft (24 GHZ EME dish) 5.7 dB Sun & 0.4 dB Moon Noise
VE4MA same 4 ft Offset Plastic dish with Aluminum foil now on surface 6.4 dB
VE4MA 8 ft (24 GHz EME dish) 6.9 dB
The remarkable thing is the 3.3 dB gain improvement in the 4 ft offset dish
performance with the addition of aluminum foil. The plastic/ fibreglass offset
dishes seem to be reasonably accurate but the reflecting material imbedded in
the surface is not very effective at this frequency (designed for 14 GHz) .
The 30 inch metal offset dish does not seem to be efficient, nor are the 39
GHz dishes.
The 4 ft dish I was using was part of a General Instrument 12 GHz receiving
system and has 8 large 5/16inch bolt heads sitting on the surface. I will be
modifying this for rounded heads.
The foil was attached with wallpaper cement (temporary) and subsequently painted
with white latex paint to reduce the heating of the feedhorn!
Best 73
Barry VE4MA
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Moon Noise was 0.3 dB
----- Original Message -----
Subj: More 47 GHz Sun Noise
Date: 7/14/02 3:49:16 PM Eastern Daylight Time
From: [email protected] (Barry Malowanchuk)
To: [email protected] (Joe K1RQG)
Good Afternoon Joe,
I made more progress today. I put round headed 5/16 " bolts to replace the hex headed
ones that stick out onto the surface, took a few bubbles out of the surface mounted
aluminum foil and put on a single coat of flat white latex paint. I measured sun noise
at 7.1 dB an increase of 0.7 dB from yesterday and that puts me at 2.3 dB above the
3 ft Precision 95 GHz dish (theoretical 2.5 dB) so I am very happy!
A good 4 ft dish is expected to be the minimum required for 47 GHz EME and it appears
that it is now possible to get one. It looks like I should do a similar foil job to
the 6 ft (borrowed) and my 8 ft 24 GHz dish. I will have to look for some really
good weatherproof adhesive.
I will try to measure moon noise later today & report
Best 73
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Subj: Net notes
Date: 7/13/02 11:02:38 PM Eastern Daylight Time
From: [email protected] (Trevor Benton)
Reply-to: [email protected]
To: [email protected]
VK4AFL - excellent conditions this s/w but very little
activity however I worked [432] on the Saturday DJ5NV,
K9SLQ & JH4JLV all with very good signals.
Will be on during the EU window tonight. Trevor, QG62OJ.
[email protected]
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Subj: SW report 16th July from SK0CC
Date: 7/16/02 9:05:56 AM Eastern Daylight Time
From: [email protected] (Sven Nordin)
To: [email protected]
CC: [email protected] (3 Uffe), [email protected] (2 FOB)
Hi all
Last weekend SK0CC worked on 70 cm : KO7N (sked), UA3PTW and DJ5NV (random) .
Sked with UA9FAD was "one way".
Sked with EA3DXU was M/M but not finished. KJ7F NIL.
Low 70cm activity, are all people 1296:ing ?
Going on project; to "zerorize" LNA to antenna cable ( is -0.25 dB ).
73 de Sven SM5LE EME op @ SK0CC
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K0YW: see email below..
K5JL: many stations on yesterday.. worked quite a few on SSB.. F6KHM extremely
loud.
W2UHI: condx excellent.. will be on today .. worked N2UO on random. good signal
from Marc. #159.. K5JL(SSB), F6KHM (SSB)..OE9ERC, K0YW, WA6PY, DL1YMK, W7SZ,
F2TU (SSB), N2IQ, IK3COJ, DF5PV, OZ6OL...
K5PJR: No xmit yet .. but many stations copied.. will be on in about a month xmit..
N2IQ: got repaired yesterday.. worked a few yesterday.. OH2DG, G4CCH worked this
morning.. QRV today..
NA4N: working on HV p/s and not long before he goets on 23cm .
N2UO: was on yesterday and worked many..
K5UGM: Bill.. found a 12' mesh dish ..
KB5SKW/: Bill..
N4PU: dish is down.. hopes to have dish back up with modification this week. will
send out IC-746 & XVTR to W4OP Monday.
NU7Z: made a decision .. FOR SALE: P/S for 2135 TWT .. 2 tubes(TWTs) , preamp, waveguide
switch and feed horn for 10ghz. will get back on 70cm and 222mhz.. serious
interest contact Rick [email protected] or phone 425-775-9196.
W4AD: questions about VE1ALQ/F1EHN box..
N8FHF: ...sig check..
EUROPE: 11:50 AM 7/14/02
DK3WG: not good results..JA3SGR not on has problems.. W4ZRZ nil, W1IPL nil,
JH7PAV nil.. K6IBY not ready till Sep. will not be home in sep.. will be around
in August..
LX1DB: will be on 23cm today this eve.. after 1900z..
VE4MA: see email for dish data..
W4SC: coming along on dish project..
VE7BQH: 12:00 PM 7/14/02
NET ENDS
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