In addition, before amplifying the signal, you will need to clean it up from out-of-band emissions of the SDR device. Two useful links out of many on the simulation of Class-C amplifiers: That was with three tubes producing kW, and a big electricity bill The class AB amplifier output is present for what portion of the input cycle? The grid is operated in the zero to negative voltage region. Surely once you are at saturation you are stuck with a certain power ratio between the grid input and plate output, and it cannot be further increased.
In other words, a positive-going, albeit negative polarity, grid-voltage causes an increasing flow of electrons between the cathode and the anode. A 3 What is the frequency deviation for a Class C is defined as an anode conduction angle of less than degrees. Minimum grid current A minimum change in grid current as the output circuit is changed Maximum grid current A maximum change in grid current as the output circuit is changed A 2 What does a neutralizing circuit do in an RF amplifier? A 3 What is the total bandwidth of an FM phone transmission having a 5- kHz deviation and a 3- kHz modulating frequency? If the wave form is not replicated and thus is distorted so will be the audio signal received by the distant station.
Extra Class question of the day: Amplifiers - KB6NU's Ham Radio Blog
The distortion could be so severe that it creates harmonics of the input signal which fall outside the desired band width and could also fall outside the amateur bands causing interference. A 2 Which principle Is Not associated with analog signal processing? A 3 The peak power output of a singlesideband transmitter, when being tested by a two-tone generator is:. Because the voltage applied to the grid controls the flow of electrons from the cathode to the anode, in function, the grid acts like a valve or gate. A 2 Why must a very stable reference oscillator be used as part of a phaselocked loop PLL frequency synthesizer? In fact your signal is probably sunk and lost among the ones of hundreds more powerful stations nearest or more powerful trying to work that DX too.
Linear unilateral and bilateral amplifiers can be represented by two-port networks. Mix immediately at low level - then pass the signal through many stages of amplification - From what I can see you would not be able to use Class C for any of these stages or you lose the modulation - or distort it to a point of uselessness. An indirectly-heated cathode can be ruined by operating it below the rated minimum filament-voltage. Amplify the carrier only to the final aerial power using Class C circuitry and use a modification to the final stage to allow the modulating signal to control the output of the transmitter. Class G amplifiers which use "rail switching" to decrease power consumption and increase efficiency are a more efficient than class AB amplifiers. Signal distortion and excessive bandwidth is a likely result when a Class C amplifier is used to amplify a single-sideband phone signal.