SCARS LIVE QUESTIONS
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VOIP@SCARSVOIP.COM
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.
THE ANSWERS TO THE ABOVE QUESTIONS WILL BE POSTED HERE SHORTLY AFTER THE CONCLUSION OF THE SUNDAY RAGCHEW NET
LIVE QUESTIONS FOR OCTOBER 24 & 25 - 2026, SUPPLIED BY K2HA
In June 2026, which historic national radio station permanently stopped broadcasting its official atomic time signals after more than a century on the air?
A: CHU – Canada
B: WWVB – U.S.A.
C: DCF77 – Germany
D: JJY – Japan
2. Cybersecurity researchers recently warned that cheap, unbranded Android smartphones are shipping with factory-embedded malware that covertly turns the devices into proxy relay nodes for a global botnet. What is the name of this threat?
A: Midnight Mimosa
B: Lemon Duck
C: Silver Sparrow
D: Cosmic Strand
3. You take a stunning, high-resolution photo on your phone and send it to a friend, only for them to ask, “Why does this look blurry?” Assuming your original camera focus was perfect, what digital distribution issue caused this drop in image quality?
A: Multipath propagation causing phase-shifted ghosting over the data link.
B: Quantization noise induced by an incorrect analog-to-digital converter clock sync.
C: Bit-stuffed packet padding truncating the image payload at the router boundary.
D: Compression artifacts from aggressive, lossy downscaling by the messaging app's servers.
4. In August 2026, a U.S. Federal Court threw out a key expert witness report in LeDoux v. Outliers, Inc. What data integrity failure caused the judge to exclude it and ultimately dismiss the case "with prejudice"?
A: It contained "hallucinated," entirely fictitious academic citations generated by AI consumer tools.
B: It used uncalibrated telemetry software that violated Federal Rule of Evidence 702 standard modelling.
C: It relied on server metadata corrupted by a documented bit-flip event.
D: It embedded proprietary source code violating active non-disclosure orders.