SCARS LIVE QUESTIONS
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VOIP@SCARSVOIP.COM
LIVE QUESTIONS FOR 11-7 & 8 - 2026
SUPPLIED BY K2HA
1. To fully leverage the "saltwater amplifier effect" with a portable HF vertical antenna on a beach, what is the maximum recommended distance from the water's edge?
A: Distance is irrelevant, as long as the ocean is in line-of-sight.
B: Exactly 1.0 wavelength away to minimize near-field detuning.
C: Within 0.3 wavelengths of the surf, ideally on wet sand.
D: At least 150 feet inland to prevent signal attenuation from humidity.
2. What phenomenon causes permanent capacity loss when charging a LiFePO4 battery below freezing?
A: Electrolyte boiling and rapid internal pressure buildup.
B: Lithium plating on the anode surface.
C: Sulfation of the internal electrodes.
D: Cathode crystallization.
3. If your car key fob battery is dying, what unusual trick can you use to temporarily extend its wireless range and locate your vehicle?
A: Hold the key fob tightly against your chin or temple while pressing the button.
B: Rub the key fob rapidly against your clothing to build up a static charge.
C: Wrap the top of the fob in aluminum foil to create a directional signal beam.
D: Hold the key fob high above your head and point it directly at the parking lot.
4. Your Icom IC-7300 is powered by a 12V LiFePO4 battery. Because Icom’s manual specifies an input voltage of 13.8 V DC ±15%, at what minimum voltage does the transceiver begin operating outside of manufacturer specifications?
A: 12.6V
B: 11.1V
C: 11.73V
D: 10.5V
THE ANSWERS TO THE ABOVE QUESTIONS WILL BE POSTED HERE SHORTLY AFTER THE CONCLUSION OF THE SUNDAY RAGCHEW NET
LIVE QUESTIONS FOR OCTOBER 31 & 11-1 - 2026, SUPPLIED BY K2HA
1. A Blaw-Knox is what kind of radio antenna?
A: A ship-to-shore rhombic wire antenna.
B: A flat-plane satellite antenna having three sides towards the source.
C: A multi-bay, multi-polarization, FM relay antenna.
D: A large, AM broadcast antenna.
2. What is an artificial RF ground?
A: A resonant circuit used to tune a wire to present a low RF impedance at the transmitter.
B: A localized grounding rod that uses chemical gels to artificially increase soil conductivity.
C: A software setting in modern transceivers that digitally isolates the chassis from AC hum.
D: A sacrificial copper braid used exclusively to protect equipment from direct lightning strikes.
3. Operating an HF radio transceiver on a saltwater beach dramatically improves long-distance signal propagation. Why?
A: Ocean humidity creates a tropospheric duct that traps radio waves.
B: High saltwater conductivity creates an ideal ground plane, lowering the antenna's radiation angle.
C: Airborne sodium chloride molecules absorb atmospheric noise, lowering the receiver's noise floor.
D: Tidal movements generate a weak piezoelectric charge that acts as a natural signal pre-amplifier.
4. Switching a 100W portable HF station from SSB voice to FT8 digital mode—while maintaining the same transmit minutes per hour—impacts battery logistics in what way?
A: FT8’s 100% duty cycle draws maximum current continuously during transmissions, roughly doubling the required battery Amp-Hour (Ah) capacity.
B: FT8's automated rapid shifting causes a power cable impedance mismatch, requiring thicker wire to prevent battery thermal runaway.
C: FT8 digital packets suppress the transceiver's power amplifier, cutting average current draw by 50% compared to compressed SSB speech.
D: FT8's phase-shift keying stores energy in internal radio capacitors, completely eliminating the need for daytime solar charging.