SCARS LIVE QUESTIONS

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LIVE QUESTIONS FOR JUNE 28 AND 29, 2025 SUPPLIED BY K2HA

CORRECTION TO THE ANSWER FOR QUESTION 2

THE CORRECT ANSWER IS B

1, Log Book of the World is a free service of the ARRL for many years, how much is the suggested contribution for non ARRL members.

A: One time contribution of $100

B: An annual pledge of $10

C: One time contribution of $50

D: A voluntary contribution of $20

2, What is meant by the term "slope detection?"

A: Tuning an FM receiver to detect an AM signal 

B: Tuning an AM receiver to detect an FM signal

C: Tuning an AM receiver to detect a SSB signal

D: Tuning an FM receiver to detect a SSB signal

3, A vertical (ground plane) antenna radiates in how many degrees of azimuth?

A: 180 degrees

B: 90 degrees

C: 45 degrees

D: 360 degrees

4, What is true when using a broadcast microphone for ham radio?

A: Make sure the pin connections match the audio input of the transmitter.

B: Use a sound board between the microphone and the transmitter to adjust the frequency range.

C: Make sure the transmitted signal is not overdriven.

D: All of the above.

THE ANSWERS TO THE ABOVE QUESTIONS ARE

1D, 2B, 3D AND 4D

LIVE QUESTIONS FOR JULY  5 AND JULY 6, 2025 SUPPLIED BY K2HA

1, In the old days hams would connect two small incandescent bulbs to their open-wire feeders. Why?

A: To prevent static buildup as the wind blew in dry air

B: The lighting effect was considered interesting and was a badge of skill that was visible to others

C: The bulbs helped lower incoming static crashes

D: To get an idea of RF balance in a balanced line feeder

2, An electromagnetic device used to couple lines of differing impedance is called a:

A: Zener diode

B: balun transformer

C: full wave rectifier

D: half wave rectifier

3, The purpose of a low pass filter in the microphone amplifier of an SDR transmitter prior to the analogue to digital converter (ADC) is to:

A: avoid higher frequency signals causing aliases in the digital representation.

B: prevent excessive bandwidth of the transmitted radio frequency signal.

C: minimize the generation of phase noise in the audio modulator.

D: optimize the average to peak power ratio to give maximum power without over-modulation.

4, The most significant safety risk of using a quarter wave vertical antenna at high power without a counterpoise is:

A: excessive noise on receive - resulting in an inability to receive weaker signals.

B: RF currents in the household wiring and power leads.

C: difficulty in getting a low SWR on the feeder to the antenna.

D: frequency instability due to RF getting into other sections of the transmitter circuitry.

THE ANSWERS TO THE ABOVE QUESTIONS WILL BE POSTED HERE SHORTLY AFTER THE CONCLUSION OF THE SUNDAY RAGCHEW NET