VHFDesign – Amateur radio development team

Skip to content [#content] VHFDesign Amateur radio development team Main Menu Our team US4ICI US2IDR UR3IQO UR7IJM UR6ISU KITs FAQ Kits list Assembly request Guides How to pay with Paypal guide Custom order Join us How to become an author? About us Contacts Search Search for: AngeliaLite Transceivers / By UR3IQO OpenHPSDR compatible transceiver LDMOS RF Power Amplifier 23cm 300 Watt Power Amplifiers / By US4ICI Power amplifier 23cm Low Noise XTAL Oscillator Transverters / By UR3IQO Low Noise XTAL Oscillator with built in PLL for VHF UHF transverters. Up Converter 13cm for QO-100 Transverters / By US4ICI Up Converter from 144 MHz (430 MHz) to 2400 MHz. Ultra low noise signal source Measurements / By UR3IQO Ultra low noise signal source for HF receivers testing. PA 23cm 300 Watt pallet with controller Power Amplifiers / By US2IDR PA 23cm assembly KIT for your own power amplifier assembly. Sequencer with CW memory keyer Other / By UR3IQO Automatic CW keyer, 4-channel sequencer and simple computer interface for PTT switching and CW manipulation. PA controller Power Amplifiers / By US4ICI The device provides operation control and protection of the power amplifier. LO PLL USB MAX2871 ADF4350 ADF4351 PLL / By UR3IQO Small PLL USB module. LO PLL ADF4350 PLL / By US4ICI Developer: US4ICI PLL contains 2200 — 4400 MHz VCO. VCO frequency divider (multiple of 1/2/4/8/16) allows to synthesize frequencies from 137.5 MHz to 4400 MHz. A good phase noise (approximately -100 dBc/Hz, 10 kHz at a frequency of 1152 MHz). This development designed to be used as SHF LO (beacon, transverter) at a fixed frequency. … LO PLL ADF4350 Read More » PA 23cm 1296 MHz MRFE6S9160 150 Watt Power Amplifiers / By US4ICI Developers: US4ICI & US2IDR Technical specifications Model: PA-23cm-150W-N-female Based on MRFE6S9160HS transistor RF Range: 1260 — 1300 MHz P input TX < 6 Watt Pout = 150 Watt (JT65, FM) Pout = 180 Watt (CW, SSB) Supply operation: 28 V DC at IDQ = 12 A (TX) Impedance: 50 ohms RF connectors: N-female Dimensions: 100 … PA 23cm 1296 MHz MRFE6S9160 150 Watt Read More » LNA QRO with built-in bypass relays for 6m 2m and 70cm bands Low Noise Amplifiers / By US2IDR 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. Transverter MICROSTRIP 5,76 GHz – 435 MHz V.2 Transverters / By UR6ISU Transverter is built on a classical scheme with synthesizer usage. Specifications Model: TRCV-6cm-70cm RF: 5760 MHz LO: 5325 MHz (by default) IF: 435 MHz (by default) Reference oscillator frequency stability (0 … 70 °C): typ. 0.2 ppm max PLL SSB PN @ 10 kHz Offset: -109 dBc/Hz Output power: > 13 dBm IF input power: … Transverter MICROSTRIP 5,76 GHz – 435 MHz V.2 Read More » LNA VOX with built-in bypass relays for 2m and 70cm bands Low Noise Amplifiers / By US4ICI 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. LNA EME ATF531 for 2m and 70cm bands Low Noise Amplifiers / By US4ICI 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. Sequencer PCB for LNA, PA, RF-Relays, Transceiver Other / By US4ICI This sequencer is designed for CO-OP work with VHF radio equipment including transceiver, PA and LNA. The main device’s assignment – ensure the inclusion order of devices listed above with correct order and delays. The circuit solution basis was taken from W6PQL. Some changes were applied to the scheme. This changes allow to use the … Sequencer PCB for LNA, PA, RF-Relays, Transceiver Read More » LNA EME SAV541 for 73cm and 70cm bands Low Noise Amplifiers / By US4ICI 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. LNA EME SKY67151 for 23cm and 21cm bands Low Noise Amplifiers / By US4ICI 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. SHF converter Measurements / By UR6ISU Переносчик спектра СВЧ сигнала У вас возникали проблемы и вопросы при настройке СВЧ аппаратуры? Уверен, кто хоть раз сталкивался с настройкой СВЧ конструкций задумывался о приобретении анализаторов СВЧ цепей. Речь идет о частотах выше 1,3 ГГц. Сегодня нам стали доступны анализаторы спектра до 1- 1,5 ГГц. Но, что быть, если вам захотелось “выше”? Практика применения LNA в тропосферной связи. Low Noise Amplifiers / By US4ICI 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 … Практика применения LNA в тропосферной связи. Read More » Posts navigation 1 2 Next Page → English Russian Categories Low Noise Amplifiers (6) Measurements (3) Other (2) PLL (2) Power Amplifiers (5) Transceivers (1) Transverters (4) Copyright © 2020 VHFDesign