Regenerative detectors were sometimes also used in TRF and superheterodyne receivers.
2.
The audio modulation; when that is done, the circuit is also called a " regenerative detector ".
3.
A regenerative detector operated in this mode is sometimes called a superregenerative detector, but in this circuit there was no separate quenching oscillator.
4.
The detector was usually a grid-leak detector, consisting of a triode tube biased near regenerative detector was used, to increase selectivity.
5.
In any case, adding a preamp stage ( RF stage ) between the antenna and the regenerative detector is often used to further lower the interference.
6.
When the regenerative detector is used in the self-oscillating mode, i . e . without a separate oscillator, it is known as an " autodyne ".
7.
A separate oscillator, sometimes called a BFO ( Beat Frequency Oscillator ) was known from the early days of radio, but was rarely used to improve the regenerative detector.
8.
The type 236 triode ( US vacuum tube, obsolete since the mid-1930s ) had a non-regenerative voltage gain of only 9.2 at 7.2 MHz, but in a regenerative detector, had voltage gain as high as 7900.
9.
The regenerative detector in the radio hat had adequate sensitivity to receive stations much more distant than the stipulated twenty-mile range, but distant stations would not have had a strong enough carrier to block the oscillations and so would be received with an objectionable heterodyne, audible as an astable squealing noise.
10.
A major improvement in stability and a small improvement in available gain is the use of a separate oscillator, which separates the oscillator and its frequency from the rest of the receiver, and also allows the regenerative detector to be set for maximum gain and selectivity-which is always in the non-oscillating condition.
