Radio Receiver Design - Reflectional

Reflectional

The reflectional receiver was a design from the early 20th century which consists of a single stage TRF receiver but which used the same amplifying tube to also amplify the audio signal after it had been detected. This was in an era where each tube was seen as a major cost (and recipient of electrical power) so that a substantial increase in the number of passive elements would be seen as preferable to including an additional tube. The design tends to be rather unstable, and is obsolete.