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Here is OK2KKW and historically as well as OK1KRA. It is our QTH, where we transmit. Join Story of Seifen. American "Holice" - Dayton Hamvention 2024 - video from marketing event of Icom. For us is rather close this. Finální slovenské výsledky květnového 2.s IARU. Aktuální přehled bouřek na území EU. EA8DBM EME. European results of the IARU May 2.subregional Contest 2024 for final check. Delayed I1KFH data of June μWC
We received an invitation to traditional SP6 VHF-SHF convention Zieleniec. It will be held on 16
to 18.8.2024. Would be some coincidence of stratospheric NLC clouds and Sporadic Es layer? More here. OK1KIR's news. Contest weekend extension! Beside our Activity contest will be held on Sunday  Alpe-Adria UHF-SHF Contest. On Saturday will begin analogue (w/o FT8!) IARU C-test at 50MHz band. Es is ON, even QRP will work well :-). SSB at μW bands in OK: 16 part of OK1AIY tale + historical overview. Directional coupler from BY (23 & 13cm).
Preliminary results list of the IARU 2.subr. & May Contest for final check. It seems we won all of our 4 bands. OK1DFC
experiments with EME at 47GHz. Not successfully yet. Hi PWR 13cm coupler by DD1US. Es 3230km
Claimed points list of the June 2024 IARU Microwave contest in OK. Submitted change proposal of C-test rules.
Reports from the last IARU SHF weekend: OK1KUO, DK0NA, OK2VMC, OK1OPT, 9A3AQ, OK5P, OK1ELE. Few weeks ago was discussed issue of the kW SSPA design due to real power at 70cm. Compare ART2K0FE.

Crazy weather... Convention of 9A hamradio Psunj - Saturday 8.June.  LM399 - reference of voltage 10,0000V. After close of IARU SHF contest we were surprized by long Es. More. Nice discovery: 7X2RO speaks Slovak. Due to upcoming heavy rain in JO60JJ area this weekend OK2A team aren't going to be QRV in June SHF :-( Czech Meteo institute is quite sure, that this contests weekend will be in OK very rainy. Chinese 23cm isolator. We received bad news. Our small OK-OM 3cm community lost OM1GX, who passed away into space of DXs. Overview of FT8 QSOs here. Ferrite materials for interference suppression. Compare reality and CRC history. Session of the persons interested in microwave issues on 29.5. Es as usual? Robotic FT8 QSOs as priority? The Nature is some-how out of Es season time list. Condx ordinary were open since 23.5. 70cm LNA w. SAW. First Es opening in 2024 season were on 16.5. Check Es tomorrow or the day after. Important PA2DW info. After 8 years this meeting is almost forgotten but physics is still valid. Ordinary SDR TRX would be good for HF. What new in Texas? 24/47GHz project of W5LUA. Video from Kozákov thrift sale meeting and CB impressions? Contest report from the VHF+up IARU May Contest 2024 by OK2A (OK2KKW). The same C-test by OK2KRT. British, German & Slovak prefinal results of the May VHF/UHF/SHF Contest IARU 2024. Be ready for 2m Es. OK1TEH sent his pics from 10.5.2024 Aurora as it was visible on the North of Prague. DD1US: coaxial cables. Within last decade of May we have in EU usually start of 2m Es season. What abt. 2024?  Good opportunity, Nice summary of Auroral weekend by VE3EN. Simple transverter SP6GZZ 10/2m. Is the FT857 with "D" better? DF2ZC released his new 2m EME NewsLetter. Aurora was visible even after Midnight from SP1.  But all sleeps. 10 - May 2024 were Aurora of decade. Condx were open as well as on 70cm and even Southern to IS0. Final results list of OK participants in the 2024 IARU March Contest. OK1TEH won 3x . EME at 47GHz wave. May contest 2024 by: DR2X, DL1EMY, DA0FF, IQ1KW, OL2J, OL7C, OL7M, OK1KUO, OK1UFF + OK1OPT. May contest 2024 by: ON4KHG, DK0NA, OK1KMP, OK1KKY, OK2PPK, 9A0BB, DL6GCK, S51ZO + S57O. May C-test.OK1KPA. Maybe tomorrow but with higher probability on Saturday await Aurora. ADSB receiver. Small "circlet" antenna for 23cm by HB9SSH and DJ6EP. TEP condx observed again. Test of Haarp transmitter. Claimed list of the IARU May 2024 2.nd subregional contest OK, OM, DL, S5, 9A and DL pics. G4DBN dish. CRC only few days before May VHF/UHF contest IARU discussed changes in terms of OK VHF contests rules. DXs in the May Contest are as usual supported by meteoritic shower / Eta Aquarids. For sure you will join it. International results list of  the IARU March Contest. OK1SPN from CB, PMR, D-Star & FM passed away, RIP! QRV list for May VHF/UHF Contest. Stavba Yagi antény. Microwave session Kozákov on 11.5. OL3Z  & 23cm. Reminder only. End of MFJ. Maybe Au late afternoon? GHz EME CT1BYM. Unique TEP DX QSO at 70cm! Spectrum analyzer up to 20GHz. 1kW PA for 10GHz! PA tranzistor up to 70cm. New license rules in UK. DG7YBN: plastic components for  antena design. HF aerial for 40MHz. 3cm 60W PA unit. Precision voltage ref. Print out the feed for QO100 satellite. End of war celebration. Two years ago. Aged,but still valid health warning. In December we remind Mr. G.Marconi. Now he has 150.birthday. But we shoudn't forget as well as A.S.Popov. Leave your announce about planned participation in the next May IARU 2.nd subregional Contest. TH7DXX. OE1KDA wrote (translated) article abt. simple HF aerials as well as few words abt. V/UHF low bands antennas. Fix your bad taste from FT8 and join 23cm SSB EME contest on May.10 before DUBUS EME contest 11-12.5. Construction of EME station with big dish (part 1). And several ideas by WA6HTP. Mostly "HF" news by EI7GL. Web page SQ1GU focused to hamradio HW at VHF & GHz bands. Seasoning & tests of tetrodes by OK1AMF. Some ham radio meetings: 1, 2, 3, 4, 5, 6. Spring trip KA6U. Cheap spectrum analyzer LTDZ. SPS by Mornsun. The World amateur radio day on 18.4. Jarda OK2UYU passed away. Who know him, remind that decent guy. New 144MHz EME NewsLetter DF2ZC. New EU web of MeanWell PS producer. Update of digi Pluto up to 3cm.
In remembrance of DL7APV
: presentation of his giant 70cm EME monster with 128 yagis. Even maybe Aurora? K2UYH released EME newsletter for 70cm & up. We lost good friend and excellent op Bernd, DL7APV, RIP.. OK1DFC established first 70cm QSO OK-A8OK, congrats. We add QSL card for 1st 9cm QSO OK-Philippines. EME trip SZ5RDS to Rhodos cancelled - DH7FB has back "pain" -> QSP DF2ZC. Dubus EME Contest today. On Monday 14.4 has a birthday ( 97! ) guru of OK VHF communication, Jindra OK1VR. Send him your wish! Spain open new HF band. Belgium is retuning. In OK temporary no change. 144MHz QSO by lightning scatter. How to manage soldering of RF PWR transistors at heatsink of SSPA. Suggestion: use Pb48Sn32Bi. 63 years. Try EME, Condx are still good. As well as TEP condx are open. Dual band GaN 30W PA chip cover 9 and 3cm. FT897 isn't for CB: update + set up and Service manual. Web is QRV already 25 years. Congrats! Prefinal results list > Easter contest. Reports: OK2PPK, OK1KMP, OK1KKY, Antenna  of  OM0MV/UB beacon. Really? Indeed next TEP DX QSOs: A65BR - FR4OO (QRB 5162km) and SV2DCD - V51WW QRB 6613 km. Lyrids MS shower is arriving. Results of the ARRL EME Contest 2023. I1KFH: dual band feed by OM6AA. SZ5RDS - 2m and 70cm EME/MS ctivity DF2ZC + DH7FB on Rhodos island (KM46CK) within 14 - Prefinal list of OK stations in March IARU Contest for last check here. Preliminary list of IARU subregional here. More about TEP opening to EU has written by EI7GL. New TEP beacon ZS6RVC. 4X/OM2IB sent us info ZS4TX. Next TEP DX from EU yesterday: 9H1TX, SV8PEX, 9H1PA completed unique QSO w.V51WW QRB > 6000km. 144MHz TEP DX QSO Greece - Namibia. Nice BPF. March VHF Contest DH3GD. VK3FS & his microwaves. Actual last known version of the IARU VHF Handbook. Overview -> meteoritic showers for MS traffic in April 24. 20W PA for 13cm by SG labs. Blog OK1EM -> view in to history. VK0DS and his target: antarctic EME activity. Don't forget to wish Happy Easter to all and join on Sunday OK Easter Contest 2m22CROSSDX - EME Yagi. Curiosity: just a week after Easter Monday -> on April 8th. 2024 will be in USA visible total eclipse of Sun.  Results of the Winter QRP contest. This video of the I4MEY team were recorded during March OK Activity test. IF transceiver Anan - G2 with 16 bit. A/D converter in the RX way maybe would be suitable even for 144MHz. Converter for HF to your two metre transceiver. DD1US amplifier -> 40W at 2,4GHz. 150W surplus PA 13cm. Maybe this article would be helpful at least for someone. TV reception in the Valley of baffleds -> tech. history. Did u read VHF contests reports of SN7L from IARU VHF Contests 2021, 2022 a 2023? Google AI translation. Late tonight or tomorrow 25.3, you can await quite strong Auroral phenomena. Overview of coax.cables data. Video records of G4CCH, focused to EME traffic. Did you seen VK3OU web? ON5GS: SSB EME with HB9Q. New first QSO abroad -> OK1KIR - LZ4OC at 24GHz. Congrats! 9cm EME Dubus Contest report by VE6BGT. Detailed description of the 10GHz feed for circular polarization in EME. Coaxial relay for higher PWR on 3cm. March subregional IARU VHF+ Contest  by DK0NA. DD1US -> 25W PA for 13cm with MRF21045 transistor. For download is available a new version of the V/U/SHF Contest log SW VUSC version 7.06. N1V on EME agn. Unique 23cm QSO VK7MO we already reported. EI7GL that QSO described in details. 4W driver for 13cm band. Mostly HF Czech publications with hamradio matter for download from OK5NW web. Abt.MS propag. by R&S. Do you remember? A bit abt. EME by R&S. What is WIFI 6E? Why we lost 6cm -> due to silence of CRC? 1.subr.2024 by OK2C, OM3KTR. First 10GHz: OK - Hawaii (OK1KIR - N1V) Congrats! 9cm Dubus EME Contest. March 2024 issue of the 2m EME Newsletter, Remind Aurora 13.3.89? Here is blackout analysis in Canada. News from the Netherlands: March 23cm contest by PA0EHG. PE1RKI produces single 145MHz cavity filter. VHF commitee of IARU R1 & OM3BH suggestions? After 43 years of QRV our OK0EP is "in the band" agn? 1.subr.2024 IARU by:IK4HLQ, OL7C, Abt."Line of sight" & VHF propagation. Newsletter IARU, welcome OM3BH. 1.subr. 2024. IARU by: OL7M, OK2PPK, OK2PVX, OK6M, ON4KHG, OR6T, F6KFH, HA8V, I1KFH, DL3IAS. Standa, OK1MS had birthday, we wish him good health. 23cm record of VK7MO via Lightning Scatter, congrats! Few ideas how to use portable trailer. Transverters of SQ9MTS. EI7GL released his VHF Newsletter. OZ9ARR works on the new EME antenna. Did you prepare similar? BPF filter for cut off  out of band QRM. 1.subr. IARU by: OK1KKY, IQ1KW, S51ZO+S59P. Well known F6BEG passed away, RIP! Aurora 3.3 OK1TEH. 1.subr. IARU by: OK1JFH, OK1KPA, OL2JF8KID. Claimed score from: 9A, S5, OK, OM, PA, G and by  IARU. Already today at 19h. will be held 2m part of NAC, SP-UKF AC & IAC. Invitation to visit Danish V-UHF news. 1st. subregional contest is over. Aurora trembled by HAARP?. Pavel OK1AIY sent next part abt. μW history. CAUTION! change of time frame for logs delivery of V/UHF Contests IARU (incl.Subregionals,μW-C). More here. Low noise frontend of the receiver input for 13cm by DD1US. Don't forget send an announce abt 1.subr. contest. Another HF transceiver XIEGU X6200. Several data like phase noise are not known yet. But FT8 will be sure. BPF for 47GHz, developed for cut off of the mirror frequency products. VHF oscillator with very low phase noise. Within 1st. IARU subregional contest will be running ionosphere heating by experimental HAARP TX. Check Es. DL3IAS - report from Winter BBT. Feb. QRP-C 2020 OK1FEN. Winter QRP: OK1TDO. Dual mode horn OE2IGL. It came from IARU: here, here, here & here. DD1US's LNA with Miteq 121643-15-17 1v0. HS60RAST is QRV. Calendar of Polish VHF/UHF contests here. Until now this record has broken by G4KUX only. SW by W3SZ. New microwave components by Kuhne. BTW as well as 1W PA for 47GHz band. VHF/UHF parts by YU7CF. Not only antenna construction by RW1AW. L.B.Cebik look at antenna a bit different. SSB envelope control. OK1XFJ SK RIP! He had 67 y.only..Omnidirectional horizont. polarized antenna. part 2, part 3, part 4, part 5 +6. K2UYH sent us new EME NewsLetter for UHF & SHF bands. Parabolic dish simple calc for basic parameters. S-parameters and how to take it. 10GHz LNA from satellite LNB. Ladder SSB X-tal filter: design & construction. It's running now. EME antenna WB9UWA pics. On 23cm is suggested to have an ability move up to 1300MHz. Measure of LNA with Miteq AMF5S-040080-12-13P amplifier for GHz "mid-bands". Web is ON again. LNA w. MMIC SPF5189Z article by DD1US. This video confirming again, that banana plug PL259 is not an UHF. Total termination of hamradio traffic in 23cm band is still issue for negotiations. VHF Contest's video IZ0CLS. From: Michigan V/UHF Society, UTAH VHF Society, Texas: retune of circulator. And maybe we missed  Aurora. International evaluation of the VHF Marconi memorial CW Contest in fact completed our Contest Season 2023. UHF antenna with isolated elements - construction details. Adjust Youtube for your language. EME HS60RAST. For download is now a list with the international results of 2023 VHF Contest evaluated by IARU C5 rules. From the same table you can seen as well as last year UHF-SHF Contest IARU and many other contests results.  Using Sun Noise Measure to Evaluate EME System Performance. Actual calendar of italian national contests. From I4CIV blog: connection of two 25Ω antennas into 50Ω feeder. Construction and VHF Contest IZ0CLS. Simple home made filter against TV interference from 2m transmitter. Precise UHF antenna elements lengths. DF2ZC released new 2m EME NewsLetter.  TEP DX-pedition Aruba. VK3FS believes that microwaves are easy. Maybe interesting for someone: Slovak PC logger -> VHF Contest log OM3CPW. Panadapter for IC9700 gear. SMA antenna relay up to 50GHz. Another coax. relays. 20W 2m driver. Calendar of Moon events by DL7APV! CRC released OK results of  MMC2023. On the web archive sheet OK2KKW are available in our usual format. The contest results archive sheet has updated by EU UHF contest 1960 winners. Waiting for EU results 2023. VE7BQH propose again outline of the best hamradio antenna designs from the perspective of noise level. W1GHZ send article abt. Cassegrain subreflector. Adds articles for study here, here. μW soldering of 122GHz. OK1TEH wkd via tropo RA3LBW QRB abt.1296km. On the N5PA VHF web you can find many interesting links. Tiny SA ultra Spectrum analyzer up to 6GHz. How to bend semirigid cables. G4FON web for CW training. Tomorrow, on 28.& 29.1 would be awaited improved tropo condx up to N & NE. Try to look there. Less than.. Mirek OK1DOM invite you to the Winter QRP Contest ČAV on Sunday 04.02.24. More at GL! First 23cm QSO OK- FO0 (Clipperton island) has assigned to OK1DFC. I hope it enjoy him. Tnx 4 info. VK0DS. From the Archive: old 70cm aerials although out of date still works well. Many advices to PWR SSPA projects. Beginners projects by NTMS: A, B, C, D. And a bit more complicated matter: how to solder small SMD devices. Time of 23cm retune is here. However we shall wait for EC decision, if they will confirm ITU negotiation results. Offset 10GHz EME dish KA1GT. Do you know inductance of this coil? EME ops. are moving by 2 MHz. When you will do at 23, or at 13cm bands final contest ODX w.I1KFH, remind they use OM6AA loop feed. Today is a significant day.. Just 50.years ago the Nature prepares special game which changed V/UHF DXing. Translation of one article maybe can help you to set a power attenuators for UHF+ frequency bands at home. OK1VAO released prefinal OK results of the Marconi Memorial Contest 2023 for final check. Chinese battery. Precise RF Wattmeters. KA6U trip ->2m EME DX from EM62 & EM72. Will be the NAC area for FT8 mildew? Results of the RU EME Contest from last year + calendar for 2024. Noise source & noise measurement basics. Yearly rent fee and electricity for operation of OK0EP beacon has paid today. Beacon is QRV already 42 years. DM2AFN SK. RIP!  Update your score of hamradio DX results in OK1VEI's OK toplist. Russian tube for 70cm. What would be good to know about LNA check here. And G4DDK paper about LNA power limits. Even our test.
Nostalgy whiff from time when our hobby was still OK - YU UHF/SHF Bulletins - do you find there your callsign?
SP society SP UKF awake and returns back to organize + evaluate of VHF-SHF contests. Join SP UKF C-test.
January 144MHz EME NewsLetter DF2ZC. 2m LNA. GEMINI PAs for VHF & up bands. IC705 USB connector. Into VHF contests archive has been added Result list of OK stations in the IARU UHF/SHF Contest 2023. Join. CRC (OK1VAO) released final Czech results of the IARU UHF-SHF Contest 2023 by CRC evaluation. See here.
IARU shaping the Future? If yes, why doesn't mention contests & GHz bands? They doesn't take it into plan? Programmable USB generator up to 30GHz with output 1/2 W. Beside MS Quadrantids check 2m EME condx. Any hamradio operator should know, how to do it. 1, 2, 3. New 70cm and above EME NewsLetter for Dec.2023. DU3T send us nice presentation about his 9cm EME effort in December, when he made first QSO DU - OK. 65th.edition of Contest Romagna CW,SSB. 144MHz part will be held already on Jan.7 2024 from 9 to 14h.UT. Did you sometimes consider about future of ham radiocommunication? On 4th. January morning is predicted peak of Qadrantids meteoritic shower. Join any nice MS DX QSO! Try Handy spectrum analyzer with option up to 6 GHz. Suitable 70cm aerials by Antennas-Amplifiers Thanks to OK1VR (96) for new years wish email! Welcome in 2024. Let me wish you all good, rock solid health, joy and sunshine by OK2KKW Radioclub. This year the life will be not easy, but I believe we will surpass all and will meet after such exertion in peace. Our Sun celebrated start of new year by firework before midnight. ČTÚ (Czech radiocom.regulator) reminds us that the Measure of a General Nature informs about the preparation of a document defining measures for the protection of the satellite radionavigation service from amateur operation in the band 23cm & ECC Radiocommunication Committee of EU wkd on decision include report on that matter.
 Our 2023 news here.



VHF - UHF - SHF 2024

76th. OK VHF FIELD DAY 2024

Beacons  QRB Maps (1) (2) (3) (4) Profile

Today EME
Actual EME condx - by MMMonVHF

Present MS condx - by MMMonVHF

Sporadic E web  ES-map    Live MUF



JUNE 2024
01 - 02 Good
08 - 09  Poor -> moderate
15 - 16  Moderate
22 - 23 Very poor
29 - 30 Good -> moderate



An older news from previous years - please click here:
 2023, 2022, 2021, 2020, 1918, 17, 1615, 14, 13, 12, 11, 10, 09, 08, 07, 06, 05, 2004, 2003, 2002, 2001 & 2000