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The 4-metre (70 MHz) band is an amateur radio band within the lower part of the very high frequency (VHF) band.. As only a few countries within and outside of Europe have allocated the band for amateur radio access, the availability of dedicated commercially manufactured equipment is limited.
A direct-conversion receiver (DCR), also known as a homodyne, synchrodyne, zero intermediate frequency or zero-IF receiver, is a radio receiver design that demodulates the incoming radio signal using synchronous detection driven by a local oscillator whose frequency is identical to, or very close to the carrier frequency of the intended signal.
It serves the Yogyakarta Special Region, Surakarta Residency in Central Java (except Wonogiri Regency). This station was the first local television station in Indonesia (the first outside Jakarta), founded in 1965. The TVRI Yogyakarta office and studio are located on Jalan Magelang km 4.5, Sleman, and the transmitter is in Patuk, Gunungkidul. [1]
Radio Kalender Angkasa; MNC Trijaya FM Lahat (98.4 FM) MNC Trijaya FM Baturaja (94.1 FM) MNC Trijaya FM Yogyakarta (97.0 FM) PT. Radio Efkindo; MNC Trijaya FM Pontianak (97.5 FM) MNC Trijaya FM Makasar, via ZIP FM (93.9 FM) MNC Trijaya FM Manado, via CWS-FM (89.4 FM) MNC Trijaya FM Medan (95.1 FM) PT. Radio Prapanca Buana Suara; MNC Trijaya FM ...
A 5-tube superheterodyne receiver manufactured by Toshiba circa 1955 Superheterodyne transistor radio circuit circa 1975. A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.
The Gonset Communicator was a series of vacuum tube VHF AM radio transceivers that were widely sold in the 1950s and early 60s. They were designed by Faust Gonsett and manufactured by the Gonset Division of L. A. Young Spring and Wire Corp. [1] Models were built for amateur radio, aircraft radio and U.S. Civil Defense use.
Rawa Buaya is an administrative village in the Cengkareng district of Jakarta. [1] It formed part of the particuliere landen or private estates of N.V. Landbouw Maatschappij Tan Tiang Po, a colonial company belonging to Luitenant der Chinezen Tan Tiang Po and his son, Tan Liok Tiauw, Landheeren (or landlords) of Batoe-Tjepper.
The complex was built in 1755–1756 (AJ 1682) for Hamengkubuwono I, the first Sultan of Yogyakarta. [1]It was one of the monarch's first acts after the signing of the Treaty of Giyanti, which recognized the creation of the Sultanate of Yogyakarta under the Dutch East India Company. [1]