OK VHF club is organizing the 34th annual EME and microwave seminar. This year's date is exceptional - instead of the traditional spring event, the seminar will take place in the fall, October 16–18, 2026, again in the proven venue of the Radešín Balloon Hotel. The change in date is due to the hotel's occupancy in the spring months; the management of the OK VHF club - Franta OK1CA and Zdeněk OK1DFC - also states that the spring date for 2027 is booked in advance.
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Program of the EME and MW seminar Radešín 2026
The core program is scheduled for Saturday, October 17. Friday is reserved for arrival, registration, and informal discussions. Sunday is for free program and departure - rooms must be vacated by 10:00.
| Date and time | Topic | Lecturer |
|---|---|---|
| Friday 16/10/2026, 15:00–20:00 | Arrival, registration, dinner, discussion | – |
| Saturday 17/10/2026, 07:45–08:45 | Breakfast – Main Dining Room | – |
| 09:00–09:25 | Opening ceremony, introduction, presentation of cups and diplomas for the Czech Championship 2025 | OK1CA, OK1DFC |
| 09:25–09:45 | What's new in EME for 2025 | Franta OK1CA |
| 09:45–10:15 | Commemoration of the first EME QSO on 432 MHz with OK1KIR – 50th anniversary | OK1KIR |
| 11:15–12:00 | Lecture (topic to be specified) | – |
| 12:00–13:00 | Lunch – Main Dining Room | – |
| 1:00 PM–1:15 PM | Group photo | Milan OK2IMH |
| 1:15 PM–2:10 PM | First EME QSO on 47 GHz and EME tests on 76 GHz | Zdenek OK1DFC |
| 14:00–15:45 | Other lectures (topics to be specified) | – |
| 4:30 PM–5:30 PM | Discussion, measurement results, exchange of experiences | OK1CA, OK1DFC |
| from 6:00 PM | Dinner – Main Dining Room | – |
| Sunday 18/10/2026 | Free time, departure (rooms must be vacated by 10:00) | – |
Of the fixed lectures, Zdeněk OK1DFC's paper on the first EME QSO on 47 GHz and tests on 76 GHz - which is still a pioneering area by European standards - will be particularly interesting. The 50th anniversary of the first EME QSO on 432 MHz by OK1KIR will also resonate, and will be specially commemorated at the seminar.
Some presentations will be available for download after the seminar in the Files section of the vhf.cz website.
Measurement options – Saturday, October 17, 2026
The measurement of the technical parameters of the devices takes place on Saturday, October 17. The range of available measurement equipment covers the needs of both the ordinary amateur designer and the advanced experimenter in microwave bands.
PSV antennas and loads
SWR measurement is available in the range from 25 MHz to 18 GHz.
Noise figure
Noise figure measurement is possible in the range of 10 MHz to 26.5 GHz. From 1.6 GHz onwards, it is measured exclusively via the TRX itself as an intermediate frequency; direct measurement is available in the range of 10 MHz to 1.6 GHz.
Performance
Power measurement is available up to 50 GHz. The maximum load at individual frequencies will be specified by the interested party individually. In the 1–6 GHz band, the R&S flow attenuation is available with a maximum load of 1 kW and attenuation of 40 dB. For 10 GHz, the load is 100 W with the WR90 and WR75 waveguides, for 24 and 47 GHz also 100 W with the WR42 and WR22 waveguides. Measurement at 47 GHz up to 100 W using the WR22 waveguide is available after prior notification in the application.
Spectrum analyzer
The spectrum analyzer is available up to 26.5 GHz; measurements up to 100 GHz are possible on special request.
Connectors and waveguides
Standard connectors available are N, SMA, 7/16 and waveguides R100, R120 and R220 (corresponding to WR75, WR90, WR42, WR22). If the device uses a different termination, the reduction is provided by the measurement participant himself.
The registration form will be available from August 2026 on the OK VHF club website. Contact the organizers: Zdeněk OK1DFC – ok1dfc@seznam.cz, tel. +420 603 489 480; Franta OK1CA – fr.strihavka@seznam.cz, tel. +420 723 287 549.