This application note presents the frequency receiver design notes of the TH71101, TH71102, TH71111 and TH71112. It discusses crystal selection of the receiver, the LNA (RF amplifier) considerations, ...

A six tube tuned radio frequency (TRF) receiver employing 201A triodes. Only one tube is in place. Circuit has three radio frequency stages, a detector and two audio stages with transformer coupling.

Also called a "tuned radio frequency" (TRF) receiver, it is a radio receiver that detects and demodulates the carrier signal broadcast by the station without using an intermediate frequency (IF) stage ...

THE principles upon which radio receivers of various types are designed at the present time have been developed by various technical workers, who have in many cases specialized on particular ...

Five tube tuned radio frequency (TRF) receiver employing Meyers RAC-3 type tubes. Circuitry consists of two RAC-3 type tubes as untuned radio frequency amplifiers, a single 201A detector (missing) and ...

Communications receiver architecture has evolved slowly over the years. The most common and successful configuration is the superheterodyne architecture, which translates the incoming signal to a ...

Testing FM receivers is not that much different than testing other pieces of audio equipment. Appropriate tests include the big six: level, frequency response, THD+N, phase, interchannel crosstalk, ...

The classic radio receiver design is the superheterodyne (superhet) architecture that US Signals Corps officer Edwin Armstrong devised in 1918. In his design submission, Armstrong describes how to ...

As any radio amateur will tell you, the world of radio abounds with exciting possibilities. Probably the simplest pursuit of them all is that of the SWL, or short wave listener, who scours the ...