custom battery packs Regenerative Receiver Design Blocks

Here is a collection of design blocks for creating a regeneration receiver based on your own specifications.You can choose from maximum frequency stability and selectivity to minimum number of components and optimal sensitivity.Design comments are also provided that allow you to further customize component values.
A stable Q multiplier circuit is the core requirement of any regenerative receiver.Compression gain.The gain provided by the amplifier must actually be reduced as the signal strength increases.When you transition through the oscillation threshold, this is necessary to provide smooth control of the regeneration effect.
It is difficult to do this directly using BJT transistor technology without resorting to techniques such as signal strength bias level changes.The circuit in figure 1, however, is a direct solution.The input impedance at the bottom of Q1 is about 5 k when the collector current is 1 mA.
The 10:1 ratio of the capacitor tap C3 and C4 increases the input impedance by about 1 times.The apparent damping impedance of 500 k is given on the LC oscillator and the effect on Q is minimalThe emitter resistance can vary between 220 ohms and 10 k, and other elements change accordingly.The transition to oscillation is very intense at high collector current and you need to reduce C4 to 33pF.
The conversion to oscillation is very smooth at low collection current, but the noise level is higher.Asymmetry of emitter resistance helps to provide smooth regeneration.Figure 2 shows the Q multiplier for bad bounce.
The gain increases as the signal strength increases.This leads to the circuit suddenly from nonWith the advancement of regeneration control, the oscillation state becomes a very strong oscillation state.However, everything is not lost when using it to create a regeneration receiver.
It needs to be coupled to an AM detector that increases the damping of the LC resonance circuit by signal strength.The requirements for AM testing are also somewhat strict.The input impedance of the AM detector must remain stable over time to prevent low-frequency oscillation from occurring.
Ideally, it should also have a slight Dynamic Damping effect.The input impedance of the AM detector should be reduced as the signal strength decreases, which helps to make the control of the regeneration effect smoother.For non-The ideal Q multiplier, as shown in Figure 2, requires a strong dynamic damping effect to control the system.
The best position for AM detection in a regeneration receiver is directly on the LC oscillator.The use of a buffer level can cause excess noise or instability.The best AM detector used is the voltage source bias drain bend FET detector, which is biased only when pinch power off is pressed down.
This gives the minimum damping and maximum frequency stability of the LC oscillator.See figure 3.A more sensitive circuit can be made by operating the FET at a higher drain current.See figure 4.When you need a strong dynamic damping effect, such as the Q multiplier in figure 2, the BJT square law detector in Figure 5 is ideal.
Figure 6 and figure 7 give two possible regenerative receiver circuits built from the circuit block.Figure 8 is a useful audio filter circuit for the regeneration receiver.It allows you to reduce 5 KHz and 10 KHz externalities from powerful adjacent carriers and provides treble enhancements, which are useful for highly selective circuits.
All circuits shown above must be powered by a stable voltage source.The gain of the Q multiplier is directly affected by the supply voltage.The AM detector and filter circuit do not have the power cord noise suppression capability.
Voltage regulator chip is recommended.
If you are using a battery and do not want to use a voltage regulator, then use a separate battery pack for both the regeneration receiver and the audio power amplifier