Subject: NET NOTES 6 January 2001
Most recent Schedules can be found here
Also submit your sked requests to Joe:
DL4MEA .. can you take skeds on weekends ?? Please answer via e-mail..
NEED ALL SKED REQUESTS FOR MARCH 3/4 ASAP !!!!
See NU7Z e-mail below for update needs for microwave list.
Check the following skeds for any changes .. 73 de Joe
EME schedules, last update 11 Feb 2001, 19:13
(432 MHz listed only)
Skeds for MAR 2
2130z AL7OB -UA6LGH
2200z AL7OB -HA1YA
2230z AL7OB -S52CW
2300z AL7OB -ON5OF
2330z AL7OB -DJ3FI
Skeds for MAR 3
Time 432.040 432.045 432.070
0000z AL7OB -PA0PLY
0300z WB0GGM-KL7HFQ 7M2PDT-AL7OB
0400z JH1XUJ-WB0GGM JA2TY -AL7OB
0530z AL7OB -N1BUG
1630z HB9Q -RW3PF
1730z DF3RU -RW3PF
1800z DK3BU -RW3PF
1900z G3LTF -RW3PF
2000z K2UYH -RW3PF WB0GGM-YO2IS
2100z KD4LT -G4YTL WB0GGM-UA6LGH
2130z KD4LT -PA4FP
2200z W1ZX -PA4FP AL7OB -YO2IS
2230z AL7OB -OE3JPC
2300z AL7OB -DK3WG
2330z AL7OB -PA4FP
Skeds for MAR 4
0230z AL7OB -KJ7F
2230z AL7OB -CT1DMK
EME schedules, last update 11 Feb 2001, 19:13
(1296 MHz listed only)
Skeds for MAR 3
0200z VE6TA -WA9OUU
1700z DJ5MN -OK1UWA
1730z DJ5MN -PA3DZL
2000z KD4LT -F1PYR
2200z VE6TA -HA5SHF
KD4LT: Needs reskeds from FEB *******
VE1ALQ: high winds .. lost some shingles off the roof..
WA4NJP: good wx past few days.. good echoes on 222..
K0YW: found out about 1296 module installation in TS-2000.. also
will be installing voice module..
K5JL: did not hear anyone on EME last night .. may go back to 70cm soon..
W7CNK: was on 70cm EME last night .. no signals, so shut down ..
W5LUA: no traffic..
W2UHI: no traffic..
W4RDI: no too much.. uses ALC to control power out ..
WA1JOF: no traffic.. Missed some skeds last weekend .. missed hitting
moon .. then found it and no one there.. almost ready with
power amp (6 tube)
NC1I: hi winds .. did not untie the antenna due to the winds.
got 28" of snow in 11 hours .. on Monday.. record snowfall for
a calendar day..
KA0RYT: temp QRT on 70cm .. antennas not complete yet..
W1ZX/M: no traffic..
WB0GGM: listened on 70cm and heard nil.. did get on with G4YTL and did
N1BUG: nil heard from EA8FF on horizon shot .. nil from AL7OB ..
Paul lost electricty and could not respond on internet..
KJ7F: ran with AL7OB and nil heard.. did visit with K5GW..
AL7OB: completed with UA9FAD.. 2 skeds this morning , did not hear
from them and did not show up.. did not complete with G4YTL..
will try to be ready for 23cm for second leg of Dubus..
DJ5MN: nil from WA8WZG last weekend .. did work WA1JOF on sked # 8
and smallest station worked..progress on 10ghz.. looking for
waveguide.. address for WA1JOF:
PO Box 186
North New Portland, Maine
10' dish 200w FN44xv
PA3DZL, OK1UWA skeds on 23cm ********
Heard IK2MMB/HB9 ok last weekend SSB/CW
LX1DB: no traffic.. not using multi-band feed due to heavy weight of all
the equipment and effects of the wx..
DK0TU: working on web page .. will have sched.skd ready Monday on web.
CT1DMK: not much traffic.. looking for AL7OB .. ******* will be on 70cm
in March weekend.. will be on 6cm and 3cm during Dubus contest
any skeds welcome, may also be back on 23cm.. after all stations
worked on 6cm & 3cm.. amy move to 23cm..
no luck with ROMs for HP-1631 .. (for K2DH)
VE7BQH: 12:07 PM 2/11/01
Subj: For NET NOTES FEB 11, 2001
Date: 2/11/01 12:18:22 PM Eastern Standard Time
From: firstname.lastname@example.org (Melum)
I forgot to tell you what time I can start on 2 March, 2130z.
Here is my list of stations for next SW:
UA6LGH S52CW 7M2PDT
HA1YA DK3WG JH1XUJ
DJ3FI PA4FP JA2TY
ON5OF DL4MEA PAØPLY
I am available all 3 days starting at Friday, 2 March at 2130z. I have 10
degree mountains to the east at moonrise, and I can work down to the
horizon to the west. I will probably get up for EU moonrise anyway so feel
free to use it.
I would like as many from JA land as I can get, if you know some more. And
I will take any stateside skeds outside my EU window. You can squeeze KJ7F
in somewhere, and N1BUG if you know his window.
Don't feel bad if you can't work these all in.
I'm off the air until next perigee.
Tnx & 73
Mike, AL7OB BP51dc http://www.customcpu.com/al7ob
432 EME - FT-736; FT-767; 9.2 Meter Dish; DEM 0.4dB; 700 WATTS
Unable to make it home this weekend for the nets.. Working out oftown
and living out of a Hotel room.. I would like reskeds with the two
stations from last month that Ihad to cancel.. Hope all is well and
look forward to getting home tomorrow (Monday) night.. May be working
in Alabama next weekend but hopefully can get it done by Friday..
Miss hearing fom all the guys on the net.. Say hi for me..!!
de Scott - KD4LT
Clyde Scott, Jr. -- EME Communications, Technical consultant
to the AM, FM & TV broadcast industry
KD4LT 229-890-2506 -- 229-985-0864 (Fax)
Subj: 6cm operation
Date: 2/11/01 3:18:33 AM Eastern Standard Time
From: email@example.com (Ivo Chladek)
To: firstname.lastname@example.org (K1RQG)
Worked last night F2TU on 6cm, he came to my CQ. Good signals 559/539.
SM4DHN did not appear. I will be on tonight, if any takers, after
2300UT. 40W, circular polarization, 5760,100.
I will be connecting to Email around 1900 UT, so before that please.
This is a last chance , with good conditions and perigee.
Thanks, 73, Ivo
Ivo Chladek, ZS6AXT
I tried to meet the schedule with W7MEM and I called and called and
heard nothing. So wont give up but I did forget one thing, I have
developed a high noise about 90 degrees azimuth, low elevation, and
horizontal polarization. Anyway thanks and Will be looking forward to
Subj: NU7Z and 5760
Date: 2/10/01 10:45:43 PM Eastern Standard Time
Hi Joe --
Wanted to give you status on my 5760 project. I have been hearing
well with increased moon noise, so the receiver is working. The DEM
transverter is doing a very comendable job too.
To my shagrin, though, I found that I have no transmitter. At first
I thought it was the TWT, in some way, but I found that I can't transmit!
It seems I have lost the control cable for TX/RX, Hydraulics on/off, and
AZ/EL control. The cable is burried under my house, and 100 feet long.
So, when things settle down I will be out rebuilding the control circuits.
I'll let you know how it goes.
Sorry, I have not been on the net but there is just to much going on
right now.. We shall return -- I promise.
By the way, please annouce that we need to update the Microwave listing,
e-mail addresses are hard to come by so I need all the help I can get
to keep it accurate.
73 to all and to all a good night
IMPROVING GS9B 13CM OPERATION
BY JOHN BERKER WA9OUU 2-01
The Gs9b tube will put out 150w with 10 to 15w drive. The DEM solid-state driver amp
has no testing drift and was used. My different test amps and the popular K9EK Ed Krome
amp all do about 18% efficiency. The main problem is tuning drift.
Ed's design has a lot going for it in construction areas, anode bypassing and cooling.
The overmode TE11 operation does not reduce efficiency and bandwidth is better then
other tested TEM only mode amps. The standard loop output coupling shows two fields,
one nearly touching the inner line and other at the outer cavity wall rotated 90
degrees. Loading adjustments can be touchy and tuning interaction is high. Different
output ideas were tried and a wire probe about a ¼ wavelength long works very well.
A #16 copper wire with a 90 deg. bend completed .44 inch out from the end of the
supplied connector was used. The best position is centered between the inner and
outer resonator lines. A filed notch where the connector collet ends inside will
aid installation. When the length is correct, best loading will be at about 20 deg.
rotation from inline. Too short peaks inline and too long peaks at large angles that
could touch the outer wall. A bent length of 1.12 inches, tip to the connector center
was used. This output adjustment allows easy over and under coupling with less tuning
change affect. Slightly over coupled seems best and lowering the drive to just reduce
power 2% is good.
Testing showed very little loading change was needed from 50w to150w output operation.
At 150w out a tuning point can be found that holds steady. This was shown to Ed Krome
at his test bench Feb 8 and is more stable at any power level than previous GS9b 13cm
Powering up drift caused by internal tube changes is another area of many experiments.
Grid heating and deformation was first tested with relay switching in the bias circuit
and the anode high voltage line. On standby a positive grid bias voltage was applied
with up to 15 volts and a grid current of 300ma, resulting in 4.5w grid dissipation.
On keydown normal operation at 100w output was tested. Drift into tune time was not
improved and at the 4.5w level it was longer. Power up drift causes the input and
output circuits to both go lower in frequency indicating increase in tube capacitance
at both gaps. Just grid movement would not do this. Heater overvoltage during standby
helped bring power up quicker and reduce input tuning drift to one set point. 14 to
14.5volts during standby, dropping back to 12 to 12.5volts keydown makes a noticeable
improvement in operation. 15 volts is not better and hours of overvoltage have not
shown damage but lots of cathode air is a good idea.
Bias and resulting idle current tests show 30 to 50ma best. More or less has greater
power up drift. A 20 volt zener diode is about right. Using a variable bias adjustment
showed that power up was helped by a low bias moving to 20volts. Tests using a 20,000
to 30,000 mfd capacitor shunting the zener diode works well. A 20 ohm series resistor
is used and a 300 ohm bleeder sets the discharge time. A solid-state dc-dc relay was
added in series triggered by drive power so the desired affect waited for CW keying
or SSB speech. This makes a noticeable improvement in operation.
With the changes, power up times and stability have been improved. Tests with outputs
of 100w keydown, 160w keyed 50% duty and 160w peak SSB were conducted will visiting
Ed Krome. With preset adjustments, power was 65% to start and 85% in two seconds going
to 100% and staying above 90% long term.
My use is for EME and now I hear short length echo's well.