432 MHz AND ABOVE EME NEWS
JUNE 1999 VOL 27 #6
ALLEN KATZ, K2UYH
ENGR DEPT., THE COLLEGE OF NEW JERSEY, TRENTON, NJ 08650-4700 (W 609-490-2817
OR H 443- 3184, FAX 609-443-1713, AND EMAIL:
Allen Katz, K2UYH
PRODUCTION ASSIST: TOM KIRK, KA2VAD (908-521-2049).
NETNEWS EDITOR: G4RGK, DAVID DIBLEY
SKEDS CORD & DIRECTORY: DL4EBY/DK0TU, KLAUS TIEDEMANN,
HALSKESTR.35, D-12167 BERLIN, (49-30-7955467), E-Mail:
EME WEB DIRECTORY by DL4EBY
***E-MAIL LIST CORD: Scott KD4LT***
*** NA EME BBS: 704-284-4854 ***
14.345, 10 AM ET SATURDAYS, AFTER VARO NET SUNDAYS:
This has been a very quiet month with little in the way
of reports. Conditions were not exceptional and activity typical of
a post contest SW. The only real bright spot was PY5ZBU presence on
both 70 and 23 to give out SA for WAC off the Moon. What is going on
with all those dxpedition possibilities discussed earlier in the
year? Summer is almost here, but I do not have one definitive
dxpedition to announce!
Mike recently finished a 16 x 12 el (NBS2.2) array and has
about 700 W from an RIW PA -- I have made some contacts on 144 EME
and have now converted my array over to 432. I heard 70 cm signals
off the Moon during the Eur contest, but condx were not good here,
and I was not heard by anyone. I also had to leave on a trip, so I
only had a couple of hours to try. But, now I am ready and inter-
ested in skeds! I worked DL9KR (559/559)
for my 1st 432 EME QSO, so
I know the system is working. I plan to start working on another 432
system this summer. I am also going to get on 1296. I have a 14'
dish and a 1.2G module for the FT-736. I just need a preamp and PA
for 23 cm.
Luis been concentrating on the microwave bands -- Since the
DUBUS contest I have been QRV on only 5.7 and 10 GHz. During the
contest I worked on 5.7 GHz SM4DHN (O/O)
with a good signal, I would
bet that Lars was using circular pol as he came with exactly equal
signals on hor and vert pol, (that never happened before with any
other linear pol station). I also contacted
LX1DB (O/O) on vert pol.
Nobody was found on random, despite 5 hours of endless CQs. On the
2nd Moon pass of the contest weekend, I switched to 10 GHz and
worked G3WDG (M/O) at the start of his Moon acquisition, which was
also my very last minutes of Moon. There are only a few weekends
with favorable declination when the Moon is in both Charlies window
and inside my polar mount's capabilities. Later I worked
DL2LAC (O/O) with good copy, but wide signal spreading. I think I was on
5.7 GHz when just about everyone else was on 10 GHz. I've made a few
improvements to my 5.7 GHz system. I have a new LNA with 2 x
ATF35076s, which give me about 27 dB of gain and 0.4-0.5 dB NF -
(its hard to tell exactly when it came to these low NFs. I also made
a few adjustments on the TWT supply and on the transverter... I'm
happy for the time being. So I will be stable with V/H, 33 W and 1.2
dB of Moon noise. I also worked VE4MA (O/O)
on 5.7 GHz with good
signals and one week later LX1DB (O/O)
on 10 GHz - now with a much
stronger signal than before. In the Jan issue of DUBUS, you will
find my TWT power supply design article. I am happy to inform all
that I have the PCB's and cores available for those who are
interested in playing with deadly high voltages - Hi.
Ruediger was active on 432 during the last SW. He worked
JA5NNS during his sked quite easily. His 2nd sked with WA4NJP was
NIL. He thought WA4NJP might have been there a few times, but condx
were not too good. Additionally, Ruediger QSO'd
N9AB for an initial
and K4QI on random. Heard were RW1AW - just when he finished up with
N9AB, then RW1AW disappeared suddenly.
Stephan was also active on 70 cm during SW. His sked with
JA5NNS was also successful, but as Ruediger (above), his sked with
WA4NJP produced only some sky-noise. Stephan called N9AB and RW1AW,
but got no response. He also heard K4QI at moonset, but it was too
late to finish a QSO (only 2 deg el).
Bernd reports not much fun during the SW on 432 -- In skeds
I heard VK4AFL only (T-M) for a partial,
and nil from UA9FAD and
YO2IS. No echoes this time, but later QSO'd
HP3XUG (M/M) for an
initial #. It seemed that Faraday was not very cooperative. I am
busy working on a solid state amp for 432, which will produce 700 W
by combing 2 x 350 W modules.
Louis reports good WX for the 2nd part of the Eur EME
contest. He operated on both 2 and 144. Louis found condition OK on
1296 and ended with a final score of 48x27. High points were QSOs
with VK5MC and DJ5MN
on random who was using only 1 yagi
J-Jacques, F1EHN reports -- The F6KSX EME group was QRV on
Saturday, 27 March during the Eur contest. We were active only on 3
cm. Activity was very poor during the Eur window, but better later
during the NA window. The operators were F1EHN, F5HRY, F6DLA and
F6ECX. The station consisted of a 50 W TWTA, 3.3 m dish, 0.8 dB NF
LNA, 10 GHz to 28 MHz direct transverter with an Image Reject Mixer
(IRM) and F1EHN's tracking system. We worked IW4BTP (539/549) for
initial #19, DL2LAC (M/O) #20, S57UUU (O-O), OH2AXH (O/O) #21 for
the 1st F-OH on 3 cm, WA7CJO (559/O) - very strong, VE4MA (M/O) #22
and VE7CLD (M/M) #23. All QSOs were made on
random. I support more
single band contests to improve EME activity on the higher bands.
Peter wasn't able to get on for much of the SW due to
conflicting activities -- I was only unable to work on 432 as my el
indicator broke (now repaired). On 432 on 24 April I worked UT3LL
for initial #340 and nil from S57RA. I called RW1AW for 45 min, but
he could not get my call correctly; he was a good signal. On 25
April I heard nil from WL7U and N2HLT, but contacted WE2Y #341 and
WB0GGM #342. Heard were N9AB, DF3RU (on SSB), DL8OBU, JA4BLC and
W7CNK. I hope this month to improve my 13 cm signal level.
Concerning the idea of alternate sked weekends for the microwave
bands, having the 2nd day dedicated to the higher bands sounds OK to
me. I guess the Europeans and JAs could have a Friday evening
activity period as well every SW, while NA stations are still hard
Harry worked 5 stations on 23 cm during the SW -- On skeds
PY5ZBU became initial #65. Nil was heard from WA9OUU or any of my
other sked stations - rather frustrating. I did work numerous
randoms, so the station appears to be working fine.
George is interested in EME. On 432 he has a 31 el Hygain yagi
at 60' fed with 70' of 7/8 hardline and a 700 W PA, but no elevation
- as yet. He also has a 10' TVRO dish for 1296 but not much power.
He is interested in trying some skeds and can be reached at:
K5TR tel 830-868-2510, or WEB:
K5TR's WEB Page
Jeff is temporarily QRT on 70 cm EME -- During the April SW, I
had a catastrophic failure. I lost the solid state driver amp to my
tube PA. I can now only put out 50 W. I also just took down my 432
EME array per the advice of Mike, K6MYC. He told me not to have a
432 array inside of a 144 MHz array. This causes serious problem in
the patterns. Something I do not want to lose especially on EME. I
will be off for a little, while I get things back up. [Some stations
have had success with 432 arrays inside their 144 arrays, but other
have had serious problems. Generally the 2 m antennas affect the 70
cm yagis, but not vice verse.]
Willie was active on 10 GHz and 70 cm in April. He now has 50
W on 3 cm at the WG switch of his feed. He uses 2 transistor amps in
parallel to achieve the 50 W. On 3 cm Willie CWNR AA5C and QSO'd
CT1DMK, GW3WDG and G4KGC.
On 432 he heard HP3XUG and DL7APV.
Hoppy's activity report for April follows -- I was unable to
operate during Eur window on 24/25 April due to high winds. I did
get on during the JA window on 25 April and worked K2UYH,
JA7BMB and W7SZ. On 26 April the wind was more moderate and I was
able to work W7SZ and OZ6OL
on random. Conditions seem to be down
this weekend. The highlight of the month was installing my 5 m dish
at WA6KBL's QTH on 22 April with lots of help, especially from W6HD
and members of the local radio club. We must all thank W6HD who led
the effort in driving the manlift and hoisting the radar mount,
counterweight assy, and dish on to the tower. It was a windy day,
but the job was finished with no casualties. Now the fun work begins
- getting all the electronics hooked up. The Feed support bracket is
being made by W6HD. The feed support poles and miscellaneous cover
plates still need to be installed, but the absolute position
indicators and servo system worked beautifully. It appears we will
see full moon at 2 degs el during normal to high dec. We all feel
confident this will be a real performer with the TH327 PA and approx
2 kW near the feed on 23 cm. Our hearty thanks also goes out to
Jeffrey, WA6KBL who did the majority of the planning, organization,
and supervision. Excellent job, Jeffrey. Many of the members of the
local radio club participated every step of the way, in preparation
for this project and we'd not be here now without their help. Our
goal is to try and be QRV on 23 cm with the new dish during the May
SW, but lots of work still needs to be accomplished. The 10 GHz
equipment should arrive this week and with a 32 W TWT at the feed,
we are hoping to be QRV on 10 GHz for the June SW. We will see how
things progress, but we are definitely getting close.
Andy is experimenting on 70 cm EME with a new form of digital
(data) transmission, PSK31, which has much better performance in the
presence of noise than the old FSK RTTY format or standard packet.
He has copied his own PSK31 echoes, but notes it is difficult to
echo test in this mode. Andy is interested in testing PSK31 EME with
others having the capability. His e-mail address is:
Rick has his dish back in operation. The new hydraulic system
is working very well. He is seeing 13.5 dB of Sun noise on 13 cm and
expects be QRV for the May SW. Rick is not on 23 cm at present.
Zdenek wants everyone to have his correct address. Many hams
have been sending QSLs, which he does not receive because they are
addressed to a very old address from CALL book. His address is
(SAMEK Zdenek, Okruzni 338, 435 13 MEZIBORI, Czech Republic). He was
not QRV for the April SW because of a business trip. Zdenek is the
1st to offer to host the 2002 EME Conference. He writes -- I am
ready with my friends to organize the EME Conference in 2002 in
Prague – the capitol city of the Czech republic. This would be the
1st EME conference in Eastern Eur.
Marc writes -- Michel and I have been quite busy working on
the station. The antenna mast is now cut down to 7 m. The dish was
completely disassembled and put back together again. The dish is en-
forced and it seems that the stability has improved. Furthermore the
reception of a local beacon is much better! We checked all
components like the coax cables, hybrid, relays, etc. and found a
bad terminator on the hybrid. The cabling from the shack to the top
of the mast will be changed this week. If all goes well we will be
on the air for the May activity weekend, and hope to get some
Don can now be QRV on either 70 and 23 cm -- I have
installed my 432 feed in my big dish together with the 1296 feed, so
I can be regularly active on 432 as well as 1296. I have engineered
a fold down type of hinge arrangement for 432 so I can change bands
in little more than 10 minutes. I listened to most of the 432 skeds
this past weekend with a very high success rate, and later QSO'd on
432 DF3RU on random and KA0RYT
on sked. Both with good signals.
Alex has finish his HPA (> 1 kW out). He is now fully QRV on
432 with 12 x 15 el BV yagis and his new amplifier, and looking for
skeds and random QSOs. QSLs (pse SASE) and skeds are via DK3WG,
(J.Fiedler, P.O.Box 1531, 15205 Frankfurt.)
Sergei missed his April skeds -- I was ready for the 2nd part
of the DUBUS-REF Contest on 3 cm, but had to go into the hospital. I
must go back to the hospital to solve my problems, should be OK for
the May SW.
Barry in April completed on 10 GHz with SM4DHN
initial and with VE7CLD (M/M)
#12 - the smear was very bad but
Gunter had a pretty good signals once they found each other. Barry
is continuing his move up the bands and is now working on 24 GHz. He
is working on preamps for 24 GHz and is getting his RX together. He
has a NF meter working and has found that a modified 2 stage LUA
amplifier with WG in/out is working best. He also has a HB 3 stage
DB6NT WG in/out LNA running FB, but the NF does not seem as good as
his LUA amp(?). He used NE329s vs 325s. He is modifying a JE1AAH
preamp for WG (3 stages) for comparison.
Grant sends an update of his activity on 70 cm -- I got the
station up and running on 432 on 21 March and worked the following
stations on 21 March W7QX and KD4LT,
and on 24 March
K5JL, K4QI, and
W7CNK. I was on for the DUBUS/REF contest and found condx average to
poor with a lot of polarity smearing - no clearly defined polarity
much of the time. I did manage to work the following stations:
OE5EYM for initial #6, DK3BU #7, W7HAH #8, K2UYH #9, K5JL, JA5OVU
#10, UR5LX #11, N2IQU #12, OE5JFL #13, DL9NDD #14, DF3RU #15, K4QI,
G3LTF #16 and DL9KR #17. After the contest I arranged a sked with
Ron, KA0RYT for #18. I had a couple more skeds after completing with
Ron, but it seemed like the band had totally shutdown. I will try
again next sked weekend to add to my 70 cm initial count and will
then switch back to 23 cm in May. I will be trying some 7211 type
tubes in the 23 cm amp courtesy of Barry, VE4MA and will let you
know how they work out.
John is now located in EM35bc and says there is a chance that
he will be back on EME, but probably only on 1296. John has the
possibility of obtaining a 14' dish and wonder if it is big enough
to work anyone? He can be reached at e-mail:
Al proposes that the SWs be arranged so that the 1st day is
primarily for 23 cm, and the 2nd for 70 cm and skeds on the micro-
wave bands. Microwave skeds would alternate every other month from
13 to 3 cm (on the 2nd day). This will accommodate those that are
active on 3 cm, but need time (portable operations) to setup. [Al
is looking for S57UUU and OH2AXH for 3 cm skeds. He is leaving for
Eur on 25 April and will be there for several weeks.]
Paul (x-SM0PYP) has reconstructed schematics of the power
supply for Thomson's TH3631 10 GHz TWTA. The power supply number is
TH22631K/ RW. Paul has mailed copies to W4TJ and W2UHI. If anybody
needs a copy of these schematics, contact W4TJ or Paul for help. He
can also help with questions regarding this power supply's problems
as he has had plenty of exercise repairing this thing! He hopes to
have his new home in shape soon, and will then concentrate on EME.
He plans to be fully QRV by the ARRL Contest.
I tried to arrange a sked with AL7OB, but never received a
reply with regard to my proposal. As it turned out, I had a cloud
burst at the time. My 432 preamp stopped working - possibly due to
water. With all the rain, I did not try real hard to repair it and
missed my K7XQ sked. The next day it was working fine. On the 2nd
day of the SW, on 24 April I switched over to 1296 and worked at
2116 I5MPK (559/559) on random
for initial #168 - it took several
calls to get his attention, 2143 K5JL (56/56)
on SSB, who was joint
at 2152 by VE1ALQ (55/54) to make it a 3-way, 22214 HB9SV (56/57) on
SSB, 2244 K3HZO (549/539) and 2317 F3PL (559/569). I also was on 23
cm for the JA window (Sunday morning), but heard only
N6BQ, who I
QSO'd at 0522 (559/539).
G4RGK, DAVID DIBLEY
DD1XF's telephone number in the April NL was incorrect. The right
number is 00 49 4532 26 13 77.
W7SZ heard KD5FZX very loud and needs a sked.
UT3LL is running 4 x 27 BV yagis with open wire feedlien, 400W PA
and 0.4 dB NF LNA.
W2UHI blew the final transistor in his transverter, and is
temporarily QRT on 1296 until repairs are made.
K5WXN worked on 432 during the April SW DL8OBU for a new one on sked
and W7CNK random, but then blew the input of his 70 cm xvtr.
KB4CNI worked on 432 in April K7XD, IK5QLO and JA5OVU but did not
hear W7EME or W0KJY on sked.
I6PNN is QRV on 5760 and looking for skeds.
WE2Y completed in April on 70 cm with W7QX and K4QI. CWNR were
W7GBI, DK3FB and DL9NDD.
KA0RYT completed 70 cm WAC in April by QSOing PY5ZBU for initial
HP3XUG worked during the April SW DL8OBU, DL7APV and RW1AW. Louis
looks for random QSOs around 432.022.
VE1ALQVE1ALQ is working on 12' dish for 10 GHz.
K1FO's 70 cm EME system is all functional, but Steve has been busy
with house projects and not had much free time for operation.
N4CNN is working toward 23 cm EME. He has a 10' dish and is working
on a GI7B PA.
CT1DMK has 3 PCB's for my TWT power supply (main board, helix board
and collector board) for $US30.
Main core (up to 350 W total dc) for
$US7. Helix core (any tube up to 10 kV helix)
for $US3, or all for
$US40 plus about $US10 for shipping. Contact Luis via e-mail at:
VK3ZQV is looking for info on 70 cm cavity low
noise amps. Contact
Mike at e-mail:
W1ZX, Willie has for sale a General Radio 1236
30 MHz IF Amplifier
$US150+S, General Radio 1216A 30 Mhz IF Amplifier
Super DSP filter $US145+s,
HP 415E SWR Meter-brown unit (later build
Noise Com Noise Diodes NC305, glass package
flat package $US42+S. Call Willie at 301 645 5584 between 2000-2300
EST, FAX 301 645 6853, 24 hrs, or E-mail:
W4AD: is looking for info on a diagonal feedhorn for 1296.
W8TN has picked up some expanded flattened Aluminum 76" x 41 1/4"
and has some leftover (0.030” thick with holes 0.160"x0.110") for
$US0.40 per 20 sq/ft.
K7XD is looking for information on driven elements for FO22 yagis.
VE4MA is looking for a manual to copy or a complete manual for a HP-
This month we have a piece on TWTA power supplies by AA5C
taken from the North Texas Microwave Society's newsletter.
UT3LL array, 4 *27el BV 432 with 2 * 2m yagis
KB0PYO 10 ft Dish for 1296 MHz
In the past few months there has been considerable discussion
on how to better coordinate skeds. Some feel we should abandon the
single SW and have multiple SWs. I am very much against such a
change. Although with e-mail, fax and inexpensive long distance
telephone service, the need for the space of several weeks to
distribute the skeds has gone the way of the Dodo bird, there is
still a good reason to have a single SW... The same reason SWs were
started more than 27 years ago... to concentrate activity. The more
days and operating weekends scheduled, the less activity you will
find on any one weekend. I am much more supportive of the idea of
partitioning the SW for activity on different bands - see W5LUAs
report. Most operators are in favor of this idea. The only question
appears whether we should move the 23 cm activity to Saturday, and
70 cm activity to Sunday as Al proposes, or vice verse. I do not
think it much matters, just as long as we get started!
It may seem early with Brazil2000 still a year away, but we have
proposal for 2002, see OK1DFC's report!
Please keep the information coming in. Technical reports are
especially needed. I will be a Dayton on Saturday and hope to see
many of you there and off the Moon the following weekend.
73, Al - K2UYH
This information was obtained from: Scott, KD4LT