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In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range. QRP operation is a specialized pursuit within the hobby that was first popularized in the early 1920s. QRP operators limit their transmitted RF output power to 5 W or less regardless of mode (Some call 10 W on Phone QRP) . [1]
The (American version) radio's main receiver covers 30 kHz through 60 MHz, 142 MHz through 152 MHz, and 420 through 450 MHz (plus 1240 through 1300 MHz with the "X" model). The sub-receiver tunes between 118 and 174 MHz, and from 220 to 512 MHz (VFO ranges).
A number of radio amateurs also build their own tube receivers and AM voice transmitters. [9] As late as the 1960s, glowbugs were part of many beginner ham stations because of their simple, tube-based designs. Glowbugs are popular among QRP enthusiasts and others with a penchant for constructing their own equipment. Enthusiasts may assemble ...
Kits brought the convenience of all parts being supplied together, with the assurance of a predictable finished product; many Heathkit model numbers became well known in the ham radio community. The HW-101 HF transceiver became so ubiquitous that even today the "Hot Water One-Oh-One" can be found in use, or purchased as used equipment at ...
Kit 7.5 MHz ext No 48 kHz 0/1 USB Yes Yes Yes SoftRock Lite II [113] Kit 1.891 – 1.795 MHz, 3.57 – 3.474 MHz, 7.104 – 7.008 MHz, 10.173 – 10.077 MHz, 14.095 – 13.999 MHz (also purchasable in other tunings) ext No 96 kHz 0/1 USB Yes Yes Yes SoftRock RX Ensemble II LF [114] Kit or Pre-built 180 kHz – 3.0 MHz ext No
Vintage amateur radio is a subset of amateur radio hobby where enthusiasts collect, restore, preserve, build, and operate amateur radio equipment from bygone years, such as those using vacuum tube technology.
It is a protocol, implemented in a computer program, used for weak-signal radio communication between amateur radio operators. The protocol was designed, and a program written initially, by Joe Taylor, K1JT. The software code is now open source and is developed by a small team.
Amateur radio operators take part in portable operations using radio equipment when traveling. "Portable" equipment indicates a configuration that allows for relatively rapid collection, transportation, and deployment of amateur radio gear. A portable station can be anything from a small QRP (Low Power) radio and antenna, to a large transceiver.