## Amateur Extra: Digital Time Division Multiplexing

The Extra-Extra-Extra Read All About it question of the week is a real beauty. [E8B12] What is digital time division multiplexing? A. Two or more data streams are assigned to…

## Amateur Extra: Blocking Dynamic Range

Today’s question for you studying to be Extra’s is a real doozy, about receivers. [E4D01] What is meant by the blocking dynamic range of a receiver? A. The difference in…

## Amateur Extra: VHF/UHF Contest Activity

This week in the Amateur Extra spectrum, we’ll look at a question from the “band plan” area of the exam [E2C06] During a VHF/UHF contest, in which band segment would…

## Amateur Extra: Power Factor

Ah, another fine math problem from the Amateur Extra exam (don’t you just love these?) [E5D18] How many watts are consumed in a circuit having a power factor of 0.71…

## Amateur Extra: Network Impedance

The Amateur Extra class question of the week comes from sub-element 5 (electrical principles) section C (polar coordinates) [E5C06] In polar coordinates, what is the impedance of a network consisting…

## Amateur Extra: Minimum Discernable Signal

The Amateur Extra torture question of the week is taken from sub-element 4 (amateur practices) section C (receiver performance) [E4C07] What does the MDS of a receiver represent? A. The…

## Amateur Extra: N-Type Charge Carriers

Extra question of the day is from sub-element 6 (circuit components) section A (n-type semiconductors) [E6A16] What are the majority charge carriers in N-type semiconductor material? A. Holes B. Free…

## Amateur Extra: LC Current at Resonance

This week’s Amateur Extra question is from sub-element 5 (Electrical Principles) group A (characteristics of resonant circuits) [E5A06] What is the magnitude of the circulating current within the components of…

## Amateur Extra: What is a Parametric Amplifier?

Today’s exam question comes from the Amateur Extra exam, Sub-element 7 (Practical Circuits) and Section B, (Amplifiers)…  [E7B20] What is a parametric amplifier? A. A type of bipolar operational amplifier…

## Amateur Extra: Identifying in a Pileup

From the realm of “Good Operating Practice” we get our question of the week from the Amateur Extra exam. [E2C11] How should you generally identify your station when attempting to…