On the twenty-first of May 2005, radio amateurs gathered in Vrútky at their regular biannual meeting to exchange knowledge and experience in the operation of low-power transmitters (QRP-5W). These meetings are organized by the Vrútok radio club OM3KFV. Addr: Rádioklub Vrútky, PO Box No. 3, 038 61 Vrútky. E-mail: om3kfv@zoznam.sk
A total of 52 of us gathered, not only QRP enthusiasts but also those who work with higher outputs. In the pleasant environment of the LESNÍK guest house, lectures by our well-known experts were held and their quality was excellent.
Šaňo Rymarenko, OM3TY, talked about QRP designs and demonstrated practical demonstrations of QRP transceivers on the 3.5 7 and 10.1 MHz bands. These home-built devices, which are as good, even better in terms of technical parameters, than factory-made "Black Boxes". It was a joy to listen to on these homemade devices.
Šaňo is our best designer of QRP devices and his work deserves a gold medal. With a little will and effort, there is a home designer hidden in each of us, you just have to make a decision. The difference is also in the price, at home we can build for 1,000 Sk what would cost 10,000 Sk in a store. And besides, we are happy with the home-made device and we are also able to repair this device ourselves and set it to the most advantageous parameters.
Furthermore, Fero, OK1NOF, an old Slovak constructor who "grounded" in the Czech Republic, enriched us technically with his performance. He brought the construction of the excellent VFO, which works on the basis of digital technology, and which can be the heart of any home or factory-made device. In it, he used the latest circuit manufacturing technology using microscopically small surface components that can be soldered only with the use of a large magnifying glass or a microscope. It's simply the technology of the space bonding technique that we've all been holding our breath over. Fero also showed us a complete KV transceiver with this universal VFO.
About QRP transmitters on VHF Jano Gavora, OM3ID, presented his paper. In addition to transmitters, he explained in detail the technique of converters and VHF to HF, the choice of intermediate frequency and the needs of HF receivers and transverters. He explained the advantages of working with QRP on VHF and pointed out the quality of operation with low power and the light weight of the equipment, which can easily be carried even to the highest mountain in Slovakia.
A great benefit of the meeting was a great discussion on all the topics presented, in which practically everyone present took part. Their contributions to the given topics often grew into the shape of their own lecture.
They talked about technical matters, operation, parts, and we didn't even notice that it had already been here for 1 hour. afternoon and time for goulash prepared by the hunting unit of the OM3KFV club. Conversations continued over plates of goulash.
For the visitors of the meeting, we also prepared an exhibition of QRP magazines and books from all over the world, as well as older issues of the Slovak magazine QRP RÁDIO, which we published until recently as an appendix to the QRP column in the magazine RÁDIOŹURNÁL.
There was also a selection of different parts and round cores for different coils for sale. We also had a discussion about the upcoming establishment of the Slovak association of QRP enthusiasts. Since the majority of QRP operators are traditionally telegraphers, we want this association to bring together those interested in QRP and telegraphy under one roof, something like the Slovak Society of QRP and Telegraphists ( SDQT ). All such similar associations in other European countries are also members of the European Association of QRP and Telegraphists, and Slovakia would be the last stone of this great European mosaic. The response to the establishment of the Slovak QRP association was favorable at the meeting. If other radio amateurs have their opinions and comments on this event, please send them to my address or by e-mail to the address: alexanderkorda@hotmail.com. We also need volunteers to run the individual sections of the magazine that we will publish for members, as well as to run the administration.
The only representation of Slovakia on the European and world scene is currently in the G-QRP Club, where 12 members are registered. Some radio amateurs are also in the OK-QRP Club.
A PROCEEDINGS of the lectures from this meeting was also available at the meeting with a lot of interesting schemes and ideas for constructors with the following content:
1. Radio amateur on the waves of the world's seas
2. Interesting website QRP pages of the international computer network
3. Reliable simple oscillator 1-20 MHz
4. Reliable VFO on the 7 MHz band
5. Simple regenerative receiver
6. Receiver for the 7 MHz band
7. Voltage regulators
8. Stabilized source up to 3A
9. Resource for reviving older tube devices
10. Various modifications of the classic QRP transmitter
11. A simple 3W transmitter for the 28 MHz band
12. Final stage 1.5 W on the 7 MHz band
13. Transceiver 2W QSK TY40a
14. Frequency counter with VFO/BFO inputs
15. Microbug
16. Circular cores T, inductance/number of turns
17. Small two-element turn signal at 7 MHz
18. Marking of outputs of transistors and linear integrated circuits
19. Labeling of transistor and linear IO cases
20. Dipole at 28, 21 and 18.05 MHz
21. Rotary dipole at 14 MHz
22. Shortened half-wave monopole for the 3.5 MHz band
When we parted in the afternoon, we were full of joy and satisfaction from a successful meeting that brought us a lot of new knowledge and experience.
Alexander Korda OM6SA
Vrútky 25.V.2005