Low noise amplifiers for 6m, 2m and 70cm bands with built-in bypass relays, based on PGA-103+ (6m) and ATF-53189 (2m and 70cm), with power through the feeder support, installed in milled aluminum case with N-female input and output connectors.
Low noise amplifiers for 2m and 70cm bands with built-in bypass relays, based on PGA-103+, with power through the feeder support, installed in milled aluminum case with N-female input and output connectors.
Low noise amplifiers for 2m and 70cm bands, based on ATF-53189, with power through the feeder support, installed in milled aluminum case with N-female input and output connectors.
Low noise amplifiers for 73cm and 70cm bands, based on SAV-541+, with power through the feeder support, installed in milled aluminum case with N-female input and output connectors.
Low noise amplifiers for 23cm and 21cm bands, based on SKY67151 (one cascade edition) and SKY67151 in the 1st cascade and PGA103+ in 2nd cascade (two cascades edition), with power through the feeder support, installed in milled aluminum case with N-female input and output connectors.
This LNA is assembled based on chip MMIC SPF5122z. HF356 AXICOM relay is used for path tracing. The main distinction from previous designs consists in RF VOX availability (HF voltage detector in the output of LNA). Such decision allows protecting amplifier from random transmitter power feed to their output. RF VOX functions correctly in CW, …
После ПД 2011 удалось провести эксперименты с МШУ 144 МГц с двумя реле обхода на SPF5122z. МШУ был установлен на UT3IWA вблизи антенны (два ряда по 7 эл, вертикально), фидер 35 метров RG213, трансивер FT847 (Кш=2.4 кТ). LNA NF=0.8 dB Место приема характеризуется изобилием помех в виде широкополосного шума, достигающего с отдельных направлений уровня S7 …
LNA 144/430 MHz на MMIC SPF5122Z The new project of US4ICI and UR7IJM is given for your attention. It is a low noise amplifier for 144 or 430 MHz bands. This amplifier particularity is that it has built on base of one chip which amplification is enough for the proper functioning of system antenna-LNA-feeding cable-transceiver. …