SCARS LIVE QUESTIONS
Come and join the fun. Send us your pictures, riddles, or questions and have them added to our weekly trivia sessions. If interested please send your email including your submission to:
VOIP@SCARSVOIP.COM
LIVE QUESTIONS FOR 11-14 & 15 - 2026, SUPPLIED BY K2HA
1. When custom firmware unlocks "promiscuous mode" (sometimes called Digital Monitor) on a digital ham radio, what specific filtering restriction is bypassed?
A: Frequency Offset matching.
B: Antenna Gain constraints.
C: Talkgroup, Color Code, and Time Slot matching.
D: Encryption Key exchange.
2. Which electromagnetic phenomenon explains why placing a credit card between an iPhone and a wireless charging pad can destroy the card's magnetic strip or overheat its internal chip?
A: Faraday's Law of Induction.
B: Electrostatic Discharge (ESD).
C: Skin Effect.
D: Piezoelectric Effect.
3. What specialized technology allows operators to identify the unique microscopic signature of a rogue or interfering transmitter, even if its frequency or call sign has been changed?
A: Automatic Packet Reporting System (APRS).
B: Radio Frequency (RF) Fingerprinting.
C: Time Difference of Arrival (TDOA).
D: Continuous Tone-Coded Squelch System (CTCSS).
4. The famous "md380tools" custom firmware revolutionized digital ham radio by unlocking "promiscuous mode" on a budget DMR HT. Which radio was the target of this historic firmware reverse-engineering project?
A: Tytera (TYT) MD-380
B: Quansheng UV-K5
C: Radioddity GD-77
D: Baofeng UV-5R
THE ANSWERS TO THE ABOVE QUESTIONS WILL BE POSTED HERE ON THE MONDAY FOLLOWING THE SUNDAY RAGCHEW NET
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