Who knows,
the
weather forecast for July Contest. Even Czech ČHMÚ
has different
view. Also
here. Mediate! Eda Merta OK1EM
celebrates 80-th
Birthday. Everyone wish him all the best, health, good luck and
happy μW!
VHF UHF Dxpedition April May 2025
A21TX
-
V5/ZS4TX -
D2TX. Chris,
PA2CHR, on holidays in Croatia,
More. 8-10W 3cm PA by DB6NT
here. Similar PA just prepares for production as well
OK1FPC.
Who made
this one? June 2025
Contest
note by
OK2KQQ,OK1KPA
&
DK0NA. But only
10-years ago
it was a real big contest.
Send to others
info about your plans for
July Fielday contest 2025.
OM results
of May 2.s.+ June MW C-test in
DL.
The best
UHF
Contest in OK call history and reminder to OK2KKW gear.
International
results of MMC 2024. Long delayed
June microwave Contest report OK2A. Es opening
loosing atractivity
due to use of FT8 robots. After few days will be
held
Friedrichshafen meeting. Large participation prepares as well
IARU.
CW training SW.
On
18.6
was
nice
Es.
New
EME
QTH OM3TRN.
Congrats! News from Texas:
1,
2,
3. Well
known
phasemeter.
Info -> if you plan to join June
IARU μW subregional, remind, that
C-test will
be held in 3rd.full weekend ->
22.6.
And next reports from the May contest? Look at
OK1FEN, OK2PPK,
OK2KOJ,
OK1KFH and
OK1KKI web. Delayed and even not
completed
contest
report from the IARU 2nd. subr. C-test of May (logs
were sent). Claimed results list of
the IARU SHF contesting in
OK,
OM &
9A. On 11.6 was
Es
observed again
but only
FT8.
Už za pár dnů se bude
konat setkání ve
Friedrichshafenu. Rozsáhlou účast připravuje
také
IARU. Učte se
CW. This evening in
70cm NAC (IAC) by OK1TEH: in 1h
activity wkd.7xI,
e.g. iz0dhc 876km, ik5amb
775km. And you?
Former Ukraian (previous)
ham radio company VHF
design from
Donetsk was suspended until end of war.
GL. IARU 2025 SHF
contest is over. Weather in OK was bad. Even hailstones. Fortunately
not
such monsters.
Quietly passed away the one who
was our beacon
of amateur radio efforts on VHF and microwave bands in EU. Something abt EME
aerials:OM0MS
at 13cm. But such antenna wasn't use for EME QSO. Read a
short story.
View to MUF and ES
QSO by Spanish eyesight OK1TEH completed personal Es CW DX
record.on 3.6:here. Italian microwave
session
"na studnici". Finally
nice Es,
but why mostly FT8?
Microwave components
IZ1OTT.
RW3BP Es above
us
send your
Es reports.
Do you think, that such
sequencer will be more reliable than
our
old?
Not likely! The key part are connectors! Next weekend will be held
IARU SHF Contest 2025. Send our
plan. Alpe-Adria
UHF-SHF Contest will be 22.6. Current EME Newsletter
for 70cm band and above
here. Failure fix
IC275H. How to fix at
70cm QRM by 2m Tx.
Prefinal
OK result list of May subregional Contest 2025. Meaningfull
instruction
manual for 23cm PA of W6PQL.
In these
days (within
last May decade) commonly we observe first large
Es opening on two metres. Be ready.
OK
rad.authority
consider to
move data
70cm? Nice pic
May C-test.
Microwave
issue and
DX record
VA3TO. Still you can use
good EME condx.
EME condx on MMM on VHF srv is down.
Digitalization:
serious
threat?
OM3TRN from OM3W is
on
the way to Moon. Pics
here,
here
&
here.
Power splitters are part of construction.
Výkonové
PAs by OZ3Z.
Video with design thematics of robust
receivers
for C-test category.
Small 300W PA.
EA8DBM
wander over Europe and
activate such DXCC countries, where the EME operation is not
so often yet. For download is available new version of Moon tracker
by SM5CUI: v.
3.2.3. here.
This
Kenwood i wll not buy. New
noise diodes up to 100GHz. Mistake in translation:
DB6NT wrote today, DX record 92,8km was at 241GHz.
May subregional prefinal
results in
DL. March subregional 2025 in
OM.
World DX record 157km on 134 GHz. Production trouble of
ICOM 7400
-
deep-fried ICs
in TX chain amplifier and how to fix it at all
-
written by 9A4CW. With regret we need say, that RC Přerov OK2KJU
lost member B.Spáčil
OK2MBN
in the age of 98 years. RIP!
How
Slovak
operator
CT9/OM3RG wkd his first (not only one)
TEP QSO
between CT9 and
ZD7 on 2 m.
More. Visit
archive library
of DB6NT. For example check also his
design. Good
experience
with aluminium
soldering. IARU May
Contest 2025 by:
OK2IWU+OK2VWX,
OL2J, DR2X,
DK0NA,
F6KFH. RF0
by
KM5PO.
Tex.
beacons. Maybe it will be helpful
for
someone. Voltage
stabilizer for
low noise
oscillator.
EME is always
needed for you? Today, on
10.5.2025 has been held traditional microwave
session of OK microwave enthusiasts
on the top of Kozakov
hill. A lot of visitors were there. Operation of 76GHz stations
were shown, lot of questions were abt.ant. Contest reports from May
subregional by:
OK2KRT,
OK1OSA,
OK2KQQ,
OK6M and on FB hidden
OL7M. When you need
send by yourself the contest log to IARU, make it today till
midnight. IARU server is running. We want send contest
results of OK2A for IARU evaluation in May VHF contest. Sad to say,
IARU web is OFF. May IARU subregional contest is over. Claimed
results in
OK,
OM,
9A, S5,
QRVmap QTH info
from YO. Unusual TEP QSO CT9ACF
and ZD7GWM. To the
EI7GL article would be nice listen to
CT9/OM3RG as well, Leave your
message about planned activity
in the IARU 2nd.subregional May contest. Ad hoc
communications. List of OK stations
calls
currently valid licensees for hamradio service use and
notification.
TESLA BC history. Lunar
calendar DL7APV
not only focused to EME. Take over from wifi guys
our 6cm DX band 5760MHz
asap. On
2m a 70cm is planned for next week
EME trip to V5. Look at
V5/ZS4TX JH92.
In May Contest make
Angola,
LNA Antennas-amplifiers
for
144 a
432 MHz,
unfortunately with
reverse logic.We suggest active ant.relay 4. RX. OK1TEH's
Auroral 70cm log since 2023. Last 70cm Aurora of ok1vpz was at
2023. More
from TEH
here +
here. On
14.4.
OK1VR
celebrated 98
birthday!
Congrats! Jindra bring
many OK hams
to VHF already
since 40-ties.
16.4. was usable
Aurora.
Unfortunately quite
poor
activity here. IC905 marketing
video.
Conference in Utrecht.
Toshiba
50W PA for 9cm.
On Sunday will be held
Easter C-test and OK
Activity test.
US plan as well as 4
EU?
SP6 VHF meeting
Zieleniec 2025 will be
held this year on the end of August (29-31.8), one week after
Holice. Search 4 signals
from
galactic
radiocommunication
direction. First hamradio Venus (EVE)
bounce
confirmed. Impressive OK results of 2024
ARRL EME Contest. Manuals of amateur radio products you can
find here. Remind to join traditional OK VHF
Easter contest.
For PA?
Recently, we had no
UNC/UNF screws on market.
2x frequency
multiplier
for HF with C-MOS chip. Maybe it
could be
modified to 432 / 1296MHz dish feed ? OK1DIX released new
version of the SW log
VUSC v.7.08.
More
here.
EME SSB 23cm today.
Dubus
EME C. April joke abt.
HF gear.
Croatian
April & AAC
meeting.
Note to tin
Flea radio market
in Prague
and
Frenštát.
Actual
EME Newsletter for 70 cm & above.
Simple "field"
reflectometer
made
by OK1FOX and
by LA8AK. Ranking in
OK Winter
VHF contest
+
BBT.
Results list of March IARU C-test in
OM
+
DL.
Claimed in
EU
+
OK.
More nifty MMIC for
higher GHz bands.
Good for your
μW gear.
Contest results 40.years
ago
- compare
here. Tomorrow: SV9/SV2DCD will run
TEP tests on 28
-
30.3.2025.
QSL EA8DBM.
Article abt.
23cm
LNA w.
MMIC.
What performance you can await from the
directional coupler - papers
16,
17,
18,
19,
more... Aurora
on 26.3.
F/DL3IAS in March AGCW 2m C-test. Tnx to I4LCK archive were
completed results of MMC
1985 and
1986. V/U/SHF web
VK3FS. When will be
PA from
microwave owen usable at 13cm? SW
tools
for circuits design.
HA6PX SK.
RIP. March IARU 2025 Subregional Contest by
OK1KKI,
IU4APB. They wrote
about us.
3cm
PA.
How to bend
a microstrip line. Calc
for compensation. Conversion "mil" to mm
here. How many
dB to him? Ferrite
circulator - view below the skin. What is
missing in calendar.
Faraday rotation loss calc by OK2AQ. A21TX opportunity.
144MHz
EME
Newsletter
DF2ZC.
March
subregional
IZ2XFR.
Croatian
calendar for
VHF up. Interdigital Bandpass
filter for cm bands -
how to do it. Similar
filters
&
cavity resonators
you may buy as well.
Prefinal results of Marconi Memorial
Contest 2024 in
OK
&
EU.
Invitation to tomorrow
9A UKV
Activity C-test.
Prefinal IARU
results of UHF - SHF - MW
Contest 2024.
Notes on the evaluation of IARU VHF Contest 2024. A view of
32
years ago to 1993 history - March
subregional and
Field day
- 12-years
later we got CRC
award. Read the last, currently valid VHF
Managers
Handbook V 10-02. Check the bandplan of 23cm on page.45-46. March VHFC-test by:
OK2C,
OK2O,
DK0NA,
OK2VMC,
HB9LU. Elecraft KH1,
CW
HF handheld.
13cm
EME. It could be
interesting - evaluation
comparison ĆRK & IARU
at first few OK stations of VHF contest
IARU 2024. Results of the IARU VHF Contest 2024
jn EU &
in OK has added.
EME
NewsLetter 432MHz & up
for Feb. 25.
Problems with 76 GHz
HW
by Tonda, OK2VMC.
Attention,
check out deadline of 3 days for sending OK logs. March VHF-C
2025 by:
OK1KFH,
OK5P,
DL3IAS,
S51ZO. Claimed results in:
9A,
S5,
OK,
OM,
PA,
G,
IARU. 1.subregional C-test IARU
is over. Already in Tuesday join
Nordic activity contest at 2m. Maybe in
tropo condx. Transceivers, manuals, schematics
as well as here.
Antennas by DF6SJ.
Dualband ant.
Eggbeater ant. OK1KKL a OK1FUN
wrote articles supports morse telegraphy.
It
open to you world of DX
QSOs incl.at
GHz. DG7YBN released new, short (5.el.)
2m antenna
with 10,5dBi gain.
International
VHF contest 2024 results. Already in 2 days
will be held IARU 1.subregional vhf/uhf Contest 2025. Leave
here your info abt.participation.
Read a bit abt.
RF directional coupler. Complicated &
precise production increase price and decrease volume.
Sharp warmer till March
C-test? If yes, maybe will be
snow again?
OK1TEH name day gift:
active
feed.
Lombardia Contest
video by
I4RGZ. If somewhere shall be feed
through capacitor install it there.
Calculators.
Valvo as a
Microwave
technigues has upgraded circulators.
KH2 EME. Aircraft
reflections and radiotelescope. Sharply will
warm up.
Maybe it would create some
tropo
condx? Will be 9cm segment in EU
still alive for us? Savings on connectors is not good idea.
More. Producers with good
renown, are
not based only on marketing. OK1BAF restored his
web pages. Kenwood brings to
market new simple VHF/UHF
transceiver
TM - D750. Uncertanity in
previous line is related 23cm band.
23cm up are C-tests bands of the
Dresdener Activity C-test. Something like a
Activity Contests on VHF/UHF. Ireland prepare
changes. Some similarity on UHF here? Success
of
OK1TP at
medium waves.
Congrats!
Used PA
deliver
power
2 H.P. SDR
developed for
remote RX.
Clearance sale
of devices in Prague 10. They
have more
connectors.
New opportunities at
24
GHz - rainscatter.
This
video would
be atractive
for FT8 fans,
Nice. This
I seen
elsewhere.
More. 5
stars PA &
Golem OK2PMS. Do you know
60dBm.com?
In EU probably will be replaced
Long wave broadcasting by a data transmission. 23cm
PA design
by
OK2VMC.
1.EME
contest
of the 2025
year already
this week.
Do
you have
QRP or QRO?
QRP Contest &
points distribution OK1OPT
by OK1EF &
ELE.
Winter
BBT of DL3IAS.
2m EME Newsletter. Tomorrow join
NAC /
IAC on 2metres & improved
tropo
condx to North.
News by EI5FK and
I0JXX.
FTX-1F.
Such 70cm
WIFI -> why not on HF?
190km at 10GHz? Test in
different way.
Where in EU to buy
something? Opportunity for
free test of Slovak VHF contest Logger OM3CPW. MS
showers Feb-March. Do you
like it? OK1TEH (as OK2KKW multi op.)
won 2024 evaluation of
OK VKV
Activity
contest on the
23;
9
& 3cm bands.
Good
EME condx this
weekend.
Interesting
battery.
Interdigital
BPF
calc.
OK
QRP
Contest together with
OM.
Antenna relay up to
kW at 2m & 200W na 10GHz.
Remind it? Thermal
compensation of
LDMOS
BIAS More.
JA1WQF
inform us,
that his team completed first EME echo in the 47GHz band
& reception of the sigs. OZ9AAR's upgrade from
satellite operation antenna setup to EME. January
EME Newsletter for 70cm & above.
Within few days will
be OK Winter
QRP Contest
&
BBT.
Weather
forecast seems OK.
From the
history
of BBT. OK1TEH's Aurora logs ->
70MHz,
144MHz
&
432MHz.
Really very big
Telescope.
HW
projects
PG1N's.
Historic 144MHz transmitter. Several access networks don't open
MMMonVHF web. Strange
3m
sporadics. Remind good
EME condx in these
days. HG5AZB made (TNX!) total
MMG Overall results of IARU UHF C-test!
Delayed
report
9A stsns
from Marconi memorial Contest 2024.
And
abt.OK2O
+
DL &
OK
+
OM
MMC results.
Looking for
Kiribati
T30
at 70cm?
More.
WI-FI freq.
and
money aroma.
Table of μW
records.
Log-per
antenna. Amazing QSO by bounce from geostacionary
satellite.
More.
Tin is not the
same as
tin.
EME
session in May. Once agn to IC706 MKIIG
fix of burn out PA transistor from OK2VMC blog, Are such
troubles more
common? OK1EM
fix IC706
MKII without PWR on 2m. Some development
by
hybridization of ordinary integrated circuits? Opportunity
for OK2BRD: Croatian digital (FT8)
competition probably replace Wednesday's
OK Moon Contest. Tomorrow will be held OK+OM Activity
C-test. But as well as
similar 9A
VHF Competition. "Wow
aerials". Another
combiner by OZ9AAR. On Feb.2nd. will be held OK Winter
QRP
C-test. We hhope for better
weather. 90°
70cm (Branch line coupler) -
combiner for HI
PWR by OK1VPZ.
Bands for sale or free for WIFI as always? Rewrite
paper log into EDI by OK2PIN. OK2KKW's Club sad
flashback.
*** Technical papers
library of NTMS. We have
cold weather. But on the end of week could be
tropo
condx. OK1TEH has on his web actual
tropo log.
Nice pics:
1,
2.
PA 2kW for 2m by
OK1UGA. 2m CW
sigs (OM8OM) with QRP 5W & 1100km QRB
(w/o FT8). Last 2024
EME Newsletter for the 70cm and above bands.
Europeans VHF beacons
list for
2m
and
70cm.
Few pics
more to MMC 24 report by OM8OM.
Congrats! OK1DAI from OK1KIR celebrated 80-ies! All the best!
Prefinal Czech results IARU
UHF/SHF Contest 2024.
Tables of OK microwave groups
resullts list by IARU. Prefinal international IARU results of
October
UHF/SHF Contest 2024. It's not the final official results list
yet. IARU R1 Society withdraw preliminary
european evaluation of the September VHF contest. We need wait a
bit.
National results of the VHF Contest
2024:
DL,
OK,
OM,
G,
F,
EA.
HB, OZ,
PA,
LA,
SP,
S5,
YU,
9A,
YO,
UA9
EME Newsletter for 70cm and above bands. Aurora
pics from OM.
Microwave Scatterpoint
Newsletter of 2023. IARU
yesterday (1.ledna) released prefinal EU results of IARU VHF
Contest. You'll find it
here. Wait
please. New year Aurora were active up to
70cm
with unusual high doppler shift.
Pic,
Be healthy and happy rather than be sick and poor.
You can't change your fate.
I wish you all the best in next years.
Contest Romagna 2025 already
Jan.5th. Next info in the
23cm Galileo issue. And CRC? Again nothing?
Spacek
labs - microwaves with Czech roots.
Leo Bodnar - precise frequency references.
Minicircuits
LN MMIC.
Quadrantidis MS on January 2-9th.
Even more. Peak on Jan.4th early morning. EME
2026 at Tenerife? Our
2024 news here.
QRV LIST
for
July
2025 IARU
Reg
I.
3.rd
subregional contest
(Field day contest)
Beacons QRB Maps (1)
(2) (3) (4) Profile
Present MS condx - by
MMMonVHF
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More
contest reports here
An older news from previous years -
please click here:
2023,
2022,
2021,
2020, 19,
18, 17,
16, 15, 14,
13,
12,
11, 10,
09,
08,
07,
06,
05,
2004, 2003,
2002, 2001
& 2000