Pri príprave na rádioamatérske skúšky robí záujemcom aj ťažkosti získať zrozumiteľné podklady, z ktorých by porozumeli otázkam elektrotechniky a rádiotechniky.…
TCVR
A transceiver (TCVR) is a radio that shares common circuitry for receiving and transmitting. In the early days of amateur radio, the receiver and transmitter were separate devices that were operated completely independently. That was not very practical. By combining them into a single unit, a transceiver was created.
Typickými obvodmi transceivera sú zosilňovače, medzifrekvenčné obvody, filtre a oscilátory. Mnohí rádioamatéri – konštruktéri – si transceiver aj v dnešnej dobe postavia svojpomocne. Iní dajú prednosť komerčnej ponuke firiem ako sú Yaesu, Kenwood, Xiegu, Icom, Baofeng, Alinco a Other.
Vďaka súčinnosti Pawła SP9EP, Grzegorza SP9GM, Leszka SP9GOJ, Rafała SP9KH, Waldka SP9AE sa podarilo dať do prevádzky nový 70cm prevádzač…
V prvom článku série som opísal interfejs (rozhranie) pre TCVR Kenwood TS-870S, čím v našej HAM rodine pribudol ďalší mód. V ďalšom pokračovaní…
FX-4C je nový SDR transceiver vyvinutý BG2FX. Pokrýva všetky hlavné sq pásma a zahŕňa možnosti širokopásmového príjmu. Jeho malá veľkosť…
Mať kvalitný signál je vizitkou rádioamatéra. Pritom na dosiahnutie kvalitného SSB signálu máme k dispozícii aj možnosti, ktoré roky dozadu…
Xiegu X6100 sa teší veľkému záujmu. Predsa KV+6 m SDR transceiver, ktorý vyniká malými rozmermi by si zrejme pod vianočným stromčekom…
Baofeng UV-5R radios are popular among radio amateurs and professional users due to their affordable price and wide range of functions. However, in Germany…
Xiegu X6100 je ultra prenosný transceiver SDR (softvérovo definované rádio) pre KV a 6 m. Vysoký výkon a bohatá funkčnosť je…
MOTTO OF THE MEETING: "AGAIN IN HOLICY!" The 31st international meeting of radio amateurs should be held on 27-28 8.2021 traditionally in the vicinity of the cultural center and sports...
In the last article, I described the interface for TCVR Kenwood TS-870S, which added another mode to our HAM family. I deliver without…
What happens to the signal when it is set high? VA3HDL shows how the level setting affects the signal quality…
What QRP TCVR on 10 bands? The QRPver DC-3001 Minion Mini weighs only 430 grams and measures 100x103x30 mm. Structurally, it uses a phase…
According to available information, Yaesu has discontinued production of the KV+6m transceiver FT-DX3000. This model was first introduced in 2012, so it is relatively…
ICOM announces improved firmware for FT8 mode for TCVR-e IC705 IC7300 and IC9700. It should be the first to be available at the end of…
I will loosely link to an article by my brother Martin, OM1MJ, in which he describes the process by which he managed to get DIGI mods working, specifically…
A very successful AGC circuit is the ND6T, but in some constructions a different connection may be useful. the described AGC circuit uses A244D…
Javier EA3GCY is the technical manager of "QRP Ham Radio Kits", a company that has been producing various DIY kits for radio amateurs since 1990. They are…
Andromeda is a combination of a powerful SDR transceiver with a PC on an Intel i5/i7 processor with Windows 10 and THETIS software. This creates KV...