V hamshacku sa PSV meter často berie ako samozrejmosť. Pripojiť medzi transceiver a anténu, stlačiť PTT, skontrolovať PSV a hotovo.…
Technique
The ability to create a device that receives or transmits radio signals is a specific field of amateur radio operators. But not only that, many other constructions such as amplifiers, filters, power supplies, or antennas are things that skillful hands of a radio amateur can make.
Rádioamatéri radi porovnávajú technické parametre. V datasheetoch sa sleduje IMD, blocking dynamic range, phase noise, ADC architektúra, roofing filtre, DSP…
Každý rádioamatér, ktorý sa niekedy pustil do stavby balunu, anténneho choke, širokopásmového transformátora, LPF, BPF alebo VF zosilňovača, skôr či…
Súčasný rozmach rádioamatérskych satelitov pracujúcich na nízkej obežnej dráhe (LEO) prináša operátorom nové možnosti, ale aj technické výzvy. Či už…
Meranie a optimalizácia anténnych systémov, filtrov a vysokofrekvenčných (VF) obvodov boli po dlhé desaťročia doménou drahých laboratórnych prístrojov. Bežný rádioamatér…
Moderné polovodičové výkonové zosilňovače (PA) osadené LDMOS tranzistormi (napríklad populárne tranzistory radu ART1K6, ART2K0FEU či klasické BLF188XR) priniesli do rádioamatérskych…
Pred vyše dvadsiatimi rokmi som zhotovil PTT nožný spínač do contestov. Konštrukcia bola založená na tele z kuprextitu spojeného pántami,…
Automatic gain control, known as AGC (Automatic Gain Control), is one of the basic functional blocks of any quality receiver. Its task…
In amateur radio practice, we often encounter the need for effective audio path management, especially when transitioning between reception (RX) and transmission...
In the field of antenna design, proper adaptation is one of the basic prerequisites for successful operation. Many radio amateurs encounter the problem of switching between…
Anyone who has ever installed a wire antenna on a tree knows the frustration: throwing weights, pencils, or tennis balls tied to a string,…
On October 9, 2025, Alberto IU1KVL released SATSAGEN version v0.9.3.7, which brings several improvements and bug fixes. The most significant innovation is...
German amateur radio operator Andreas DL6YCL is known for his practical solutions of antenna systems for microwave bands, especially in operation through...
We once talked about the DL-Special DX antenna with Vilo, OM3CAQ. In amateur radio operation, we constantly look for solutions that offer...
In amateur radio practice, we often encounter interference caused by the backflow of high-frequency (HF) signal through the power supply network - therefore...
Another novelty from the Tokyo exhibition is the FTX-1F from Yaesu, a portable transceiver that uses SDR technology and provides an output power of 6...
At the Tokyo Ham Fair, Icom presented the new KV+6m transceiver in the high-end category. The IC-7760 conceptually consists of a removable front panel and a body,…
The possibility to create a modern SDR with small dimensions is proven by SQUARE SDR. Its construction includes a PCB with...
After a successful repair of the AlfaSPID rotor on the RDM-12 tower - replacing the motor unit - I encountered a feature in operation that...
Patrik DC8PAT designed a transmitter for satellite QO-100 that can be made using 3D printing. Currently in version 2.1, which you can purchase...