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Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

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Pencil Tubes

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ANTENTOP- 01- 2012, # 016

Pencil Tubes

 

 

 

 

 

Figure 7 Schematic of RF Power Amplifier for Frequencies Higher the 100- MHz

 

Superregenerative Detector

Receivers made on pencil tubes that was contained a Superregenerative Detector were widely used in military and special application. Figure 8 shows a typical schematic of the Superregenerative Detector. Regenerative circuit made on tube 1, quench generator made on tube 2. Quench voltage at the second grid of the tube 1 should be in limits 20- 25- V.

Level of the voltage more the 25- V just follows to increasing of the pass band. Level of the voltage less the 20- V just decreases sensitivity and stability of the Superregenerative Detector. Sometimes (when saving battery power plays role) regenerative cascade and quench generator combine in one tube. But stability and sensitivity are suffered at this.

 

 

 

Figure 8 Typical Schematic of the Superregenerative Detector

 

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May 3, 2016 23:17

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