How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?

  1. Two inductors are in series between the input and output, and a capacitor is connected between the two inductors and ground
  2. Two capacitors are in series between the input and output, and an inductor is connected between the two capacitors and ground
  3. An inductor is connected between the input and ground, another inductor is connected between the output and ground, and a capacitor is connected between the input and output
  4. A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between input and output


Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor?

  1. It is a low-pass filter
  2. It is a band-pass filter
  3. It is a high-pass filter
  4. It is a notch filter


What advantage does a Pi-L-network have over a regular Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

  1. Greater harmonic suppression
  2. Higher efficiency
  3. Lower losses
  4. Greater transformation range


How does an impedance-matching circuit transform a complex impedance to a resistive impedance?

  1. It introduces negative resistance to cancel the resistive part of impedance
  2. It introduces transconductance to cancel the reactive part of impedance
  3. It cancels the reactive part of the impedance and changes the resistive part to a desired value
  4. Network resistances are substituted for load resistances and reactances are matched to the resistances


Which filter type is described as having ripple in the passband and a sharp cutoff?

  1. A Butterworth filter
  2. An active LC filter
  3. A passive op-amp filter
  4. A Chebyshev filter


What are the distinguishing features of an elliptical filter?

  1. Gradual passband rolloff with minimal stop band ripple
  2. Extremely flat response over its pass band with gradually rounded stop band corners
  3. Extremely sharp cutoff with one or more notches in the stop band
  4. Gradual passband rolloff with extreme stop band ripple


What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?

  1. A band-pass filter
  2. A notch filter
  3. A Pi-network filter
  4. An all-pass filter


Which of the following factors has the greatest effect in helping determine the bandwidth and response shape of a crystal ladder filter?

  1. The relative frequencies of the individual crystals
  2. The DC voltage applied to the quartz crystal
  3. The gain of the RF stage preceding the filter
  4. The amplitude of the signals passing through the filter


What is a Jones filter as used as part of an HF receiver IF stage?

  1. An automatic notch filter
  2. A variable bandwidth crystal lattice filter
  3. A special filter that emphasizes image responses
  4. A filter that removes impulse noise


Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?

  1. A crystal filter
  2. A cavity filter
  3. A DSP filter
  4. An L-C filter


Which of the following is the common name for a filter network which is equivalent to two L-networks connected back-to-back with the two inductors in series and the capacitors in shunt at the input and output?

  1. Pi-L
  2. Cascode
  3. Omega
  4. Pi


Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50 ohm unbalanced output?

  1. A Phase Inverter Load network
  2. A Pi-network with an additional series inductor on the output
  3. A network with only three discrete parts
  4. A matching network in which all components are isolated from ground


What is one advantage of a Pi-matching network over an L-matching network consisting of a single inductor and a single capacitor?

  1. The Q of Pi-networks can be varied depending on the component values chosen
  2. L-networks cannot perform impedance transformation
  3. Pi-networks have fewer components
  4. Pi-networks are designed for balanced input and output


Which mode is most affected by non-linear phase response in a receiver IF filter?

  1. Meteor scatter
  2. Single-Sideband voice
  3. Digital
  4. Video


What is a crystal lattice filter?

  1. A power supply filter made with interlaced quartz crystals
  2. An audio filter made with four quartz crystals that resonate at 1kHz intervals
  3. A filter with wide bandwidth and shallow skirts made using quartz crystals
  4. A filter with narrow bandwidth and steep skirts made using quartz crystals