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The GU-50 (Russian: ГУ-50) is a power pentode vacuum tube intended for 50 watt operation as a linear RF amplifier on frequencies up to 120 MHz. It is, in fact, a Soviet-produced copy of the Telefunken LS-50 power pentode, [ 1 ] possibly reverse-engineered from German ( Wehrmacht ) military radios captured during World War II , or based on ...
Midway through the 4-Line's run, in 1967, Drake introduced a receiver and transmitter pair meant for the Novice licensee - the 2-C receiver and 2-NT transmitter. The 2-C was an improved receiver based on the 2-B design using a few more solid state devices. Thus, it was a sophisticated design compared to most other receivers targeting Novices.
SDRstick UDPSDR-HF1 [107] Please Note: A functional receiver requires both the UDPSDR-HF1 and a BeMicro SDK FPGA development board: Pre-built 0.1 – 30 MHz ? No 80 Msps 0/1 1G Ethernet via BeMicroCV-A9 Yes Yes Yes Altera (as an add-on) SDR MK1.5 'Andrus' [108] Pre-built, Open Source Design 5 kHz – 31 MHz (1.7 GHz downconverter opt.) ? No 64 MSPS
This is a list of rack-mount or tabletop communications receivers that include short wave frequencies. This list does not include handheld, portable or consumer grade equipment. Those that include VHF or UHF can be termed wideband receivers, whereas those without HF would be termed scanners, or surveillance receivers.
Three-unit receiver racks were still predominant, but the receiver line-up was quite different. One receiver would usually be a R-4A homing receiver, another the VHF R-28/ARC-5, and the last an MF/HF communication receiver. The transmitter rack would hold a VHF T-23/ARC-5 and an MF/HF transmitter corresponding to the MF/HF receiver.
A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load. The term usually refers to a type of radio-frequency (RF) power amplifier , some of which have output power measured in kilowatts , and are used in amateur radio .