What is a tuned radio frequency TRF receiver?
The T.R.F. (tuned radio frequency) receiver was among the first designs available in the early days when means of amplification by valves became available. The basic principle was that all r.f. stages simultaneously tuned to the received frequency before detection and subsequent amplification of the audio signal. This electronics tutorials site is totally free for you to use and is financed wholly by click revenue derived from our sponsors who mainly advertise at the top of the pages and some other below. By visiting their different sites you demonstrate your very practical support for this valuable free site and for our sponsors as well. Thank you and enjoy my site. The principle disadvantages were (a) all r.f. stages had to track one another and this is quite difficult to achieve technically, also (b) because of design considerations, the received bandwidth increases with frequency. As an example – if the circuit design Q was 55 at 550 Khz the received bandwidth would be 550 / 55 or
